diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index bb26e0ceda..73c72e7a2d 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -614,6 +614,12 @@ tasks:
# working_directory: examples/zig_cross_compiling
# build_targets:
# - "//..."
+ nix_cross_compiling:
+ name: Nix cross compiling test
+ platform: nixos
+ working_directory: examples/nix_cross_compiling
+ build_targets:
+ - "//:nix_cross_compiling"
buildifier:
version: latest
diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000000..3550a30f2d
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/examples/nix_cross_compiling/.bazelrc b/examples/nix_cross_compiling/.bazelrc
new file mode 100644
index 0000000000..6686d26d11
--- /dev/null
+++ b/examples/nix_cross_compiling/.bazelrc
@@ -0,0 +1,15 @@
+# Sensible Defaults
+build --sandbox_default_allow_network=false
+build --incompatible_strict_action_env
+build --action_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1
+build --incompatible_enable_cc_toolchain_resolution=true
+
+# Require Platform Transitions
+## This works by setting the targte platform to an invalid platform
+## and each `x_binary()` and `x_library()` rule unfortunately needs
+## to tag itself with `platform_missing` to get excluded from glob
+## builds like `build //...` but still have a way to include them
+## by removing the filter line for things like Rust Analyzer.
+build --host_platform=//bazel/platforms:host
+build --platforms=//bazel/platforms:missing
+build --build_tag_filters=-platform_missing
diff --git a/examples/nix_cross_compiling/.envrc b/examples/nix_cross_compiling/.envrc
new file mode 100644
index 0000000000..3550a30f2d
--- /dev/null
+++ b/examples/nix_cross_compiling/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/examples/nix_cross_compiling/.gitignore b/examples/nix_cross_compiling/.gitignore
new file mode 100644
index 0000000000..a6ef824c1f
--- /dev/null
+++ b/examples/nix_cross_compiling/.gitignore
@@ -0,0 +1 @@
+/bazel-*
diff --git a/examples/nix_cross_compiling/BUILD.bazel b/examples/nix_cross_compiling/BUILD.bazel
new file mode 100644
index 0000000000..2fe78721e6
--- /dev/null
+++ b/examples/nix_cross_compiling/BUILD.bazel
@@ -0,0 +1,167 @@
+load("@aspect_bazel_lib//lib:transitions.bzl", "platform_transition_binary")
+
+# Disabled targets need the user to supply a sysroot in `flake.nix` first.
+
+# Explicit filegroup as globbed `//...` will skip targets without an error if
+# `cargo-bazel` doesn't generate a target for a given platform.
+filegroup(
+ name = "nix_cross_compiling",
+ srcs = [
+ # "cc_binary_aarch64-apple-darwin",
+ # "cc_binary_aarch64-apple-ios",
+ "cc_binary_aarch64-linux-android",
+ "cc_binary_aarch64-unknown-linux-gnu",
+ "cc_binary_wasm32-unknown-unknown",
+ "cc_binary_wasm32-wasi",
+ # "cc_binary_x86_64-apple-darwin",
+ # "cc_binary_x86_64-pc-windows-msvc",
+ "cc_binary_x86_64-unknown-linux-gnu",
+ "cc_binary_x86_64-unknown-nixos-gnu",
+ # "rust_binary_aarch64-apple-darwin",
+ # "rust_binary_aarch64-apple-ios",
+ "rust_binary_aarch64-linux-android",
+ "rust_binary_aarch64-unknown-linux-gnu",
+ "rust_binary_wasm32-unknown-unknown",
+ "rust_binary_wasm32-wasi",
+ # "rust_binary_x86_64-apple-darwin",
+ # "rust_binary_x86_64-pc-windows-msvc",
+ "rust_binary_x86_64-unknown-linux-gnu",
+ "rust_binary_x86_64-unknown-nixos-gnu",
+ ],
+)
+
+"""
+platform_transition_binary(
+ name = "cc_binary_aarch64-apple-darwin",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:aarch64-apple-darwin",
+)
+"""
+
+"""
+platform_transition_binary(
+ name = "cc_binary_aarch64-apple-ios",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:aarch64-apple-ios",
+)
+"""
+
+platform_transition_binary(
+ name = "cc_binary_aarch64-linux-android",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:aarch64-linux-android",
+)
+
+platform_transition_binary(
+ name = "cc_binary_aarch64-unknown-linux-gnu",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:aarch64-unknown-linux-gnu",
+)
+
+platform_transition_binary(
+ name = "cc_binary_wasm32-unknown-unknown",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:wasm32-unknown-unknown",
+)
+
+platform_transition_binary(
+ name = "cc_binary_wasm32-wasi",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:wasm32-wasi",
+)
+
+"""
+platform_transition_binary(
+ name = "cc_binary_x86_64-apple-darwin",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:x86_64-apple-darwin",
+)
+"""
+
+"""
+platform_transition_binary(
+ name = "cc_binary_x86_64-pc-windows-msvc",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:x86_64-pc-windows-msvc",
+)
+"""
+
+platform_transition_binary(
+ name = "cc_binary_x86_64-unknown-linux-gnu",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:x86_64-unknown-linux-gnu",
+)
+
+platform_transition_binary(
+ name = "cc_binary_x86_64-unknown-nixos-gnu",
+ binary = "//cc_binary",
+ target_platform = "//bazel/platforms:x86_64-unknown-nixos-gnu",
+)
+
+"""
+platform_transition_binary(
+ name = "rust_binary_aarch64-apple-darwin",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:aarch64-apple-darwin",
+)
+"""
+
+"""
+platform_transition_binary(
+ name = "rust_binary_aarch64-apple-ios",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:aarch64-apple-ios",
+)
+"""
+
+platform_transition_binary(
+ name = "rust_binary_aarch64-linux-android",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:aarch64-linux-android",
+)
+
+platform_transition_binary(
+ name = "rust_binary_aarch64-unknown-linux-gnu",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:aarch64-unknown-linux-gnu",
+)
+
+platform_transition_binary(
+ name = "rust_binary_wasm32-unknown-unknown",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:wasm32-unknown-unknown",
+)
+
+platform_transition_binary(
+ name = "rust_binary_wasm32-wasi",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:wasm32-wasi",
+)
+
+"""
+platform_transition_binary(
+ name = "rust_binary_x86_64-apple-darwin",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:x86_64-apple-darwin",
+)
+"""
+
+"""
+platform_transition_binary(
+ name = "rust_binary_x86_64-pc-windows-msvc",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:x86_64-pc-windows-msvc",
+)
+"""
+
+platform_transition_binary(
+ name = "rust_binary_x86_64-unknown-linux-gnu",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:x86_64-unknown-linux-gnu",
+)
+
+platform_transition_binary(
+ name = "rust_binary_x86_64-unknown-nixos-gnu",
+ binary = "//rust_binary",
+ target_platform = "//bazel/platforms:x86_64-unknown-nixos-gnu",
+)
diff --git a/examples/nix_cross_compiling/README.md b/examples/nix_cross_compiling/README.md
new file mode 100644
index 0000000000..8438fafd8c
--- /dev/null
+++ b/examples/nix_cross_compiling/README.md
@@ -0,0 +1,3 @@
+# Nix + Bazel Cross Compiling
+
+Blog Post:
diff --git a/examples/nix_cross_compiling/WORKSPACE.bazel b/examples/nix_cross_compiling/WORKSPACE.bazel
new file mode 100644
index 0000000000..d00f7a2d0a
--- /dev/null
+++ b/examples/nix_cross_compiling/WORKSPACE.bazel
@@ -0,0 +1,99 @@
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+# Aspect Bazel Lib
+http_archive(
+ name = "aspect_bazel_lib",
+ sha256 = "97fa63d95cc9af006c4c7b2123ddd2a91fb8d273012f17648e6423bae2c69470",
+ strip_prefix = "bazel-lib-1.30.2",
+ url = "https://github.com/aspect-build/bazel-lib/releases/download/v1.30.2/bazel-lib-v1.30.2.tar.gz",
+)
+
+load("@aspect_bazel_lib//lib:repositories.bzl", "aspect_bazel_lib_dependencies")
+
+aspect_bazel_lib_dependencies()
+
+# Nix
+http_archive(
+ name = "io_tweag_rules_nixpkgs",
+ sha256 = "657db2e70d933f252735a5a5c9f532c4cd5e77018b9d7256bc9c7b80a01e96b5",
+ strip_prefix = "rules_nixpkgs-816e913f41d161659cbd1e49ff77694853398a3a",
+ urls = ["https://github.com/tweag/rules_nixpkgs/archive/816e913f41d161659cbd1e49ff77694853398a3a.tar.gz"],
+)
+
+load("@io_tweag_rules_nixpkgs//nixpkgs:repositories.bzl", "rules_nixpkgs_dependencies")
+
+rules_nixpkgs_dependencies()
+
+load("//bazel:nix_repositories.bzl", "nix_repositories")
+
+nix_repositories()
+
+# Rust
+local_repository(
+ name = "rules_rust",
+ path = "../..",
+)
+
+load("@rules_rust//rust:repositories.bzl", "rules_rust_dependencies")
+
+rules_rust_dependencies()
+
+load("@rules_rust//crate_universe:defs.bzl", "crates_repository", "render_config", "splicing_config")
+load("//bazel/cargo:crates_repository.bzl", CARGO_ANNOTATIONS = "ANNOTATIONS", CARGO_PACKAGES = "PACKAGES")
+
+crates_repository(
+ name = "crate_index",
+ annotations = CARGO_ANNOTATIONS,
+ cargo_lockfile = "//bazel/cargo:Cargo.lock",
+ generate_build_scripts = False,
+ generator = "@cargo-bazel//:bin/cargo-bazel",
+ lockfile = "//bazel/cargo:cargo-bazel-lock.json",
+ packages = CARGO_PACKAGES,
+ render_config = render_config(
+ platforms_template = "@//bazel/cargo/platforms:{triple}",
+ ),
+ rust_toolchain_cargo_template = "@nix_rust//:bin/{tool}",
+ rust_toolchain_rustc_template = "@nix_rust//:bin/{tool}",
+ splicing_config = splicing_config(
+ resolver_version = "2",
+ ),
+ supported_platform_triples = [
+ "aarch64-apple-darwin",
+ "aarch64-apple-ios",
+ "aarch64-linux-android",
+ "aarch64-unknown-linux-gnu",
+ "wasm32-unknown-unknown",
+ "wasm32-wasi",
+ "x86_64-apple-darwin",
+ "x86_64-pc-windows-msvc",
+ "x86_64-unknown-linux-gnu",
+ ],
+)
+
+load("@crate_index//:defs.bzl", "crate_repositories")
+
+crate_repositories()
+
+# Toolchains
+register_toolchains(
+ "//bazel/toolchains/cc/aarch64-apple-darwin:toolchain",
+ "//bazel/toolchains/cc/aarch64-apple-ios:toolchain",
+ "//bazel/toolchains/cc/aarch64-linux-android:toolchain",
+ "//bazel/toolchains/cc/aarch64-unknown-linux-gnu:toolchain",
+ "//bazel/toolchains/cc/wasm32-unknown-unknown:toolchain",
+ "//bazel/toolchains/cc/wasm32-wasi:toolchain",
+ "//bazel/toolchains/cc/x86_64-apple-darwin:toolchain",
+ "//bazel/toolchains/cc/x86_64-pc-windows-msvc:toolchain",
+ "//bazel/toolchains/cc/x86_64-unknown-linux-gnu:toolchain",
+ "//bazel/toolchains/cc/x86_64-unknown-nixos-gnu:toolchain",
+ "//bazel/toolchains/rust/aarch64-apple-darwin:toolchain",
+ "//bazel/toolchains/rust/aarch64-apple-ios:toolchain",
+ "//bazel/toolchains/rust/aarch64-linux-android:toolchain",
+ "//bazel/toolchains/rust/aarch64-unknown-linux-gnu:toolchain",
+ "//bazel/toolchains/rust/wasm32-unknown-unknown:toolchain",
+ "//bazel/toolchains/rust/wasm32-wasi:toolchain",
+ "//bazel/toolchains/rust/x86_64-apple-darwin:toolchain",
+ "//bazel/toolchains/rust/x86_64-pc-windows-msvc:toolchain",
+ "//bazel/toolchains/rust/x86_64-unknown-linux-gnu:toolchain",
+ "//bazel/toolchains/rust/x86_64-unknown-nixos-gnu:toolchain",
+)
diff --git a/examples/nix_cross_compiling/bazel/BUILD b/examples/nix_cross_compiling/bazel/BUILD
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/examples/nix_cross_compiling/bazel/cargo/BUILD b/examples/nix_cross_compiling/bazel/cargo/BUILD
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/examples/nix_cross_compiling/bazel/cargo/Cargo.lock b/examples/nix_cross_compiling/bazel/cargo/Cargo.lock
new file mode 100644
index 0000000000..90eda90c90
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/cargo/Cargo.lock
@@ -0,0 +1,365 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "addr2line"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
+[[package]]
+name = "anyhow"
+version = "1.0.75"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "backtrace"
+version = "0.3.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2089b7e3f35b9dd2d0ed921ead4f6d318c27680d4a5bd167b3ee120edb105837"
+dependencies = [
+ "addr2line",
+ "cc",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bytes"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
+
+[[package]]
+name = "cc"
+version = "1.0.84"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f8e7c90afad890484a21653d08b6e209ae34770fb5ee298f9c699fcc1e5c856"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "direct-cargo-bazel-deps"
+version = "0.0.1"
+dependencies = [
+ "anyhow",
+ "tokio",
+]
+
+[[package]]
+name = "gimli"
+version = "0.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6fb8d784f27acf97159b40fc4db5ecd8aa23b9ad5ef69cdd136d3bc80665f0c0"
+
+[[package]]
+name = "hermit-abi"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d77f7ec81a6d05a3abb01ab6eb7590f6083d08449fe5a1c8b1e620283546ccb7"
+
+[[package]]
+name = "libc"
+version = "0.2.150"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89d92a4743f9a61002fae18374ed11e7973f530cb3a3255fb354818118b2203c"
+
+[[package]]
+name = "lock_api"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c168f8615b12bc01f9c17e2eb0cc07dcae1940121185446edc3744920e8ef45"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
+[[package]]
+name = "memchr"
+version = "2.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+
+[[package]]
+name = "miniz_oxide"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7810e0be55b428ada41041c41f32c9f1a42817901b4ccf45fa3d4b6561e74c7"
+dependencies = [
+ "adler",
+]
+
+[[package]]
+name = "mio"
+version = "0.8.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3dce281c5e46beae905d4de1870d8b1509a9142b62eedf18b443b011ca8343d0"
+dependencies = [
+ "libc",
+ "wasi",
+ "windows-sys",
+]
+
+[[package]]
+name = "num_cpus"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
+[[package]]
+name = "object"
+version = "0.32.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9cf5f9dd3933bd50a9e1f149ec995f39ae2c496d31fd772c1fd45ebc27e902b0"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c42a9226546d68acdd9c0a280d17ce19bfe27a46bf68784e4066115788d008e"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-targets",
+]
+
+[[package]]
+name = "pin-project-lite"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8afb450f006bf6385ca15ef45d71d2288452bc3683ce2e2cacc0d18e4be60b58"
+
+[[package]]
+name = "proc-macro2"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "134c189feb4956b20f6f547d2cf727d4c0fe06722b20a0eec87ed445a97f92da"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4722d768eff46b75989dd134e5c353f0d6296e5aaa3132e776cbdb56be7731aa"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "rustc-demangle"
+version = "0.1.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
+
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
+[[package]]
+name = "signal-hook-registry"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4dccd0940a2dcdf68d092b8cbab7dc0ad8fa938bf95787e1b916b0e3d0e8e970"
+
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index 0000000000..1b267f47f4
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+ "sha256": "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "wasi",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "wasi",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "crate_features": {
+ "common": [
+ "default",
+ "std"
+ ],
+ "selects": {}
+ },
+ "edition": "2018",
+ "version": "0.11.0+wasi-snapshot-preview1"
+ },
+ "license": "Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT"
+ },
+ "windows-sys 0.48.0": {
+ "name": "windows-sys",
+ "version": "0.48.0",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows-sys/0.48.0/download",
+ "sha256": "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_sys",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_sys",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "crate_features": {
+ "common": [
+ "Win32",
+ "Win32_Foundation",
+ "Win32_Networking",
+ "Win32_Networking_WinSock",
+ "Win32_Security",
+ "Win32_Storage",
+ "Win32_Storage_FileSystem",
+ "Win32_System",
+ "Win32_System_Console",
+ "Win32_System_IO",
+ "Win32_System_Pipes",
+ "Win32_System_SystemServices",
+ "Win32_System_Threading",
+ "Win32_System_WindowsProgramming",
+ "default"
+ ],
+ "selects": {}
+ },
+ "deps": {
+ "common": [
+ {
+ "id": "windows-targets 0.48.5",
+ "target": "windows_targets"
+ }
+ ],
+ "selects": {}
+ },
+ "edition": "2018",
+ "version": "0.48.0"
+ },
+ "license": "MIT OR Apache-2.0"
+ },
+ "windows-targets 0.48.5": {
+ "name": "windows-targets",
+ "version": "0.48.5",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows-targets/0.48.5/download",
+ "sha256": "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_targets",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_targets",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "deps": {
+ "common": [],
+ "selects": {
+ "aarch64-pc-windows-gnullvm": [
+ {
+ "id": "windows_aarch64_gnullvm 0.48.5",
+ "target": "windows_aarch64_gnullvm"
+ }
+ ],
+ "cfg(all(target_arch = \"aarch64\", target_env = \"msvc\", not(windows_raw_dylib)))": [
+ {
+ "id": "windows_aarch64_msvc 0.48.5",
+ "target": "windows_aarch64_msvc"
+ }
+ ],
+ "cfg(all(target_arch = \"x86\", target_env = \"gnu\", not(windows_raw_dylib)))": [
+ {
+ "id": "windows_i686_gnu 0.48.5",
+ "target": "windows_i686_gnu"
+ }
+ ],
+ "cfg(all(target_arch = \"x86\", target_env = \"msvc\", not(windows_raw_dylib)))": [
+ {
+ "id": "windows_i686_msvc 0.48.5",
+ "target": "windows_i686_msvc"
+ }
+ ],
+ "cfg(all(target_arch = \"x86_64\", target_env = \"gnu\", not(target_abi = \"llvm\"), not(windows_raw_dylib)))": [
+ {
+ "id": "windows_x86_64_gnu 0.48.5",
+ "target": "windows_x86_64_gnu"
+ }
+ ],
+ "cfg(all(target_arch = \"x86_64\", target_env = \"msvc\", not(windows_raw_dylib)))": [
+ {
+ "id": "windows_x86_64_msvc 0.48.5",
+ "target": "windows_x86_64_msvc"
+ }
+ ],
+ "x86_64-pc-windows-gnullvm": [
+ {
+ "id": "windows_x86_64_gnullvm 0.48.5",
+ "target": "windows_x86_64_gnullvm"
+ }
+ ]
+ }
+ },
+ "edition": "2018",
+ "version": "0.48.5"
+ },
+ "license": "MIT OR Apache-2.0"
+ },
+ "windows_aarch64_gnullvm 0.48.5": {
+ "name": "windows_aarch64_gnullvm",
+ "version": "0.48.5",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows_aarch64_gnullvm/0.48.5/download",
+ "sha256": "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_aarch64_gnullvm",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_aarch64_gnullvm",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "edition": "2018",
+ "version": "0.48.5"
+ },
+ "license": "MIT OR Apache-2.0"
+ },
+ "windows_aarch64_msvc 0.48.5": {
+ "name": "windows_aarch64_msvc",
+ "version": "0.48.5",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows_aarch64_msvc/0.48.5/download",
+ "sha256": "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_aarch64_msvc",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_aarch64_msvc",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "edition": "2018",
+ "version": "0.48.5"
+ },
+ "license": "MIT OR Apache-2.0"
+ },
+ "windows_i686_gnu 0.48.5": {
+ "name": "windows_i686_gnu",
+ "version": "0.48.5",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows_i686_gnu/0.48.5/download",
+ "sha256": "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_i686_gnu",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_i686_gnu",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "edition": "2018",
+ "version": "0.48.5"
+ },
+ "license": "MIT OR Apache-2.0"
+ },
+ "windows_i686_msvc 0.48.5": {
+ "name": "windows_i686_msvc",
+ "version": "0.48.5",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows_i686_msvc/0.48.5/download",
+ "sha256": "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_i686_msvc",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_i686_msvc",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "edition": "2018",
+ "version": "0.48.5"
+ },
+ "license": "MIT OR Apache-2.0"
+ },
+ "windows_x86_64_gnu 0.48.5": {
+ "name": "windows_x86_64_gnu",
+ "version": "0.48.5",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows_x86_64_gnu/0.48.5/download",
+ "sha256": "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_x86_64_gnu",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_x86_64_gnu",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "edition": "2018",
+ "version": "0.48.5"
+ },
+ "license": "MIT OR Apache-2.0"
+ },
+ "windows_x86_64_gnullvm 0.48.5": {
+ "name": "windows_x86_64_gnullvm",
+ "version": "0.48.5",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows_x86_64_gnullvm/0.48.5/download",
+ "sha256": "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_x86_64_gnullvm",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_x86_64_gnullvm",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "edition": "2018",
+ "version": "0.48.5"
+ },
+ "license": "MIT OR Apache-2.0"
+ },
+ "windows_x86_64_msvc 0.48.5": {
+ "name": "windows_x86_64_msvc",
+ "version": "0.48.5",
+ "repository": {
+ "Http": {
+ "url": "https://crates.io/api/v1/crates/windows_x86_64_msvc/0.48.5/download",
+ "sha256": "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+ }
+ },
+ "targets": [
+ {
+ "Library": {
+ "crate_name": "windows_x86_64_msvc",
+ "crate_root": "src/lib.rs",
+ "srcs": [
+ "**/*.rs"
+ ]
+ }
+ }
+ ],
+ "library_target_name": "windows_x86_64_msvc",
+ "common_attrs": {
+ "compile_data_glob": [
+ "**"
+ ],
+ "edition": "2018",
+ "version": "0.48.5"
+ },
+ "license": "MIT OR Apache-2.0"
+ }
+ },
+ "binary_crates": [],
+ "workspace_members": {
+ "direct-cargo-bazel-deps 0.0.1": ""
+ },
+ "conditions": {
+ "aarch64-apple-darwin": [
+ "aarch64-apple-darwin"
+ ],
+ "aarch64-apple-ios": [
+ "aarch64-apple-ios"
+ ],
+ "aarch64-linux-android": [
+ "aarch64-linux-android"
+ ],
+ "aarch64-pc-windows-gnullvm": [],
+ "aarch64-unknown-linux-gnu": [
+ "aarch64-unknown-linux-gnu"
+ ],
+ "cfg(all(target_arch = \"aarch64\", target_env = \"msvc\", not(windows_raw_dylib)))": [],
+ "cfg(all(target_arch = \"x86\", target_env = \"gnu\", not(windows_raw_dylib)))": [],
+ "cfg(all(target_arch = \"x86\", target_env = \"msvc\", not(windows_raw_dylib)))": [],
+ "cfg(all(target_arch = \"x86_64\", target_env = \"gnu\", not(target_abi = \"llvm\"), not(windows_raw_dylib)))": [
+ "x86_64-unknown-linux-gnu"
+ ],
+ "cfg(all(target_arch = \"x86_64\", target_env = \"msvc\", not(windows_raw_dylib)))": [
+ "x86_64-pc-windows-msvc"
+ ],
+ "cfg(not(all(windows, target_env = \"msvc\", not(target_vendor = \"uwp\"))))": [
+ "aarch64-apple-darwin",
+ "aarch64-apple-ios",
+ "aarch64-linux-android",
+ "aarch64-unknown-linux-gnu",
+ "wasm32-unknown-unknown",
+ "wasm32-wasi",
+ "x86_64-apple-darwin",
+ "x86_64-unknown-linux-gnu"
+ ],
+ "cfg(not(target_family = \"wasm\"))": [
+ "aarch64-apple-darwin",
+ "aarch64-apple-ios",
+ "aarch64-linux-android",
+ "aarch64-unknown-linux-gnu",
+ "x86_64-apple-darwin",
+ "x86_64-pc-windows-msvc",
+ "x86_64-unknown-linux-gnu"
+ ],
+ "cfg(not(windows))": [
+ "aarch64-apple-darwin",
+ "aarch64-apple-ios",
+ "aarch64-linux-android",
+ "aarch64-unknown-linux-gnu",
+ "wasm32-unknown-unknown",
+ "wasm32-wasi",
+ "x86_64-apple-darwin",
+ "x86_64-unknown-linux-gnu"
+ ],
+ "cfg(target_os = \"hermit\")": [],
+ "cfg(target_os = \"redox\")": [],
+ "cfg(target_os = \"wasi\")": [
+ "wasm32-wasi"
+ ],
+ "cfg(tokio_taskdump)": [],
+ "cfg(unix)": [
+ "aarch64-apple-darwin",
+ "aarch64-apple-ios",
+ "aarch64-linux-android",
+ "aarch64-unknown-linux-gnu",
+ "x86_64-apple-darwin",
+ "x86_64-unknown-linux-gnu"
+ ],
+ "cfg(windows)": [
+ "x86_64-pc-windows-msvc"
+ ],
+ "wasm32-unknown-unknown": [
+ "wasm32-unknown-unknown"
+ ],
+ "wasm32-wasi": [
+ "wasm32-wasi"
+ ],
+ "x86_64-apple-darwin": [
+ "x86_64-apple-darwin"
+ ],
+ "x86_64-pc-windows-gnullvm": [],
+ "x86_64-pc-windows-msvc": [
+ "x86_64-pc-windows-msvc"
+ ],
+ "x86_64-unknown-linux-gnu": [
+ "x86_64-unknown-linux-gnu"
+ ]
+ }
+}
diff --git a/examples/nix_cross_compiling/bazel/cargo/crates/BUILD b/examples/nix_cross_compiling/bazel/cargo/crates/BUILD
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/examples/nix_cross_compiling/bazel/cargo/crates/libc.bzl b/examples/nix_cross_compiling/bazel/cargo/crates/libc.bzl
new file mode 100644
index 0000000000..fd92d19e3a
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/cargo/crates/libc.bzl
@@ -0,0 +1,20 @@
+load("@rules_rust//crate_universe:defs.bzl", "crate")
+
+ANNOTATION = crate.annotation(
+ rustc_flags = [
+ "--cfg=freebsd11",
+ "--cfg=libc_priv_mod_use",
+ "--cfg=libc_union",
+ "--cfg=libc_const_size_of",
+ "--cfg=libc_align",
+ "--cfg=libc_int128",
+ "--cfg=libc_core_cvoid",
+ "--cfg=libc_packedN",
+ "--cfg=libc_cfg_target_vendor",
+ "--cfg=libc_non_exhaustive",
+ "--cfg=libc_long_array",
+ "--cfg=libc_ptr_addr_of",
+ "--cfg=libc_underscore_const_names",
+ "--cfg=libc_const_extern_fn",
+ ],
+)
diff --git a/examples/nix_cross_compiling/bazel/cargo/crates/proc-macro2.bzl b/examples/nix_cross_compiling/bazel/cargo/crates/proc-macro2.bzl
new file mode 100644
index 0000000000..5f99586884
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/cargo/crates/proc-macro2.bzl
@@ -0,0 +1,10 @@
+load("@rules_rust//crate_universe:defs.bzl", "crate")
+
+ANNOTATION = crate.annotation(
+ rustc_flags = [
+ "--cfg=proc_macro_span",
+ "--cfg=span_locations",
+ "--cfg=use_proc_macro",
+ "--cfg=wrap_proc_macro",
+ ],
+)
diff --git a/examples/nix_cross_compiling/bazel/cargo/crates/syn.bzl b/examples/nix_cross_compiling/bazel/cargo/crates/syn.bzl
new file mode 100644
index 0000000000..25ff244b01
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/cargo/crates/syn.bzl
@@ -0,0 +1,16 @@
+load("@rules_rust//crate_universe:defs.bzl", "crate")
+
+ANNOTATION = crate.annotation(
+ crate_features = [
+ "clone-impls",
+ "derive",
+ "extra-traits",
+ "fold",
+ "full",
+ "parsing",
+ "printing",
+ "proc-macro",
+ "visit-mut",
+ "visit",
+ ],
+)
diff --git a/examples/nix_cross_compiling/bazel/cargo/crates_repository.bzl b/examples/nix_cross_compiling/bazel/cargo/crates_repository.bzl
new file mode 100644
index 0000000000..169420922b
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/cargo/crates_repository.bzl
@@ -0,0 +1,22 @@
+load("@rules_rust//crate_universe:defs.bzl", "crate")
+load("//bazel/cargo/crates:libc.bzl", libc = "ANNOTATION")
+load("//bazel/cargo/crates:proc-macro2.bzl", proc_macro2 = "ANNOTATION")
+load("//bazel/cargo/crates:syn.bzl", syn = "ANNOTATION")
+
+PACKAGES = {
+ "anyhow": crate.spec(
+ version = "1.0.75",
+ ),
+ "tokio": crate.spec(
+ version = "1.34.0",
+ features = [
+ "full",
+ ],
+ ),
+}
+
+ANNOTATIONS = {
+ "libc": [libc],
+ "proc-macro2": [proc_macro2],
+ "syn": [syn],
+}
diff --git a/examples/nix_cross_compiling/bazel/cargo/platforms/BUILD b/examples/nix_cross_compiling/bazel/cargo/platforms/BUILD
new file mode 100644
index 0000000000..0fff2254cd
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/cargo/platforms/BUILD
@@ -0,0 +1,109 @@
+load("@bazel_skylib//lib:selects.bzl", "selects")
+
+config_setting(
+ name = "aarch64-apple-darwin",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:macos",
+ ],
+)
+
+config_setting(
+ name = "aarch64-apple-ios",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:ios",
+ ],
+)
+
+config_setting(
+ name = "aarch64-linux-android",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:android",
+ ],
+)
+
+# This seems like the best way for the Cargo generated dependencies to be
+# aware of `aarch64-unknown-nixos-gnu`.
+selects.config_setting_group(
+ name = "aarch64-unknown-linux-gnu",
+ match_any = [
+ ":aarch64-unknown-linux-gnu_linux",
+ ":aarch64-unknown-linux-gnu_nixos",
+ ],
+)
+
+config_setting(
+ name = "aarch64-unknown-linux-gnu_linux",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:linux",
+ ],
+)
+
+config_setting(
+ name = "aarch64-unknown-linux-gnu_nixos",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:nixos",
+ ],
+)
+
+config_setting(
+ name = "wasm32-unknown-unknown",
+ constraint_values = [
+ "@platforms//cpu:wasm32",
+ "@platforms//os:none",
+ ],
+)
+
+config_setting(
+ name = "wasm32-wasi",
+ constraint_values = [
+ "@platforms//cpu:wasm32",
+ "@platforms//os:wasi",
+ ],
+)
+
+config_setting(
+ name = "x86_64-apple-darwin",
+ constraint_values = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:macos",
+ ],
+)
+
+config_setting(
+ name = "x86_64-pc-windows-msvc",
+ constraint_values = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:windows",
+ ],
+)
+
+# This seems like the best way for the Cargo generated dependencies to be
+# aware of `x86_64-unknown-nixos-gnu`.
+selects.config_setting_group(
+ name = "x86_64-unknown-linux-gnu",
+ match_any = [
+ ":x86_64-unknown-linux-gnu_linux",
+ ":x86_64-unknown-linux-gnu_nixos",
+ ],
+)
+
+config_setting(
+ name = "x86_64-unknown-linux-gnu_linux",
+ constraint_values = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:linux",
+ ],
+)
+
+config_setting(
+ name = "x86_64-unknown-linux-gnu_nixos",
+ constraint_values = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+)
diff --git a/examples/nix_cross_compiling/bazel/nix_repositories.bzl b/examples/nix_cross_compiling/bazel/nix_repositories.bzl
new file mode 100644
index 0000000000..980b667061
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/nix_repositories.bzl
@@ -0,0 +1,231 @@
+load("@io_tweag_rules_nixpkgs//nixpkgs:nixpkgs.bzl", "nixpkgs_flake_package")
+
+_CONFIG_BUILD_FILE_CONTENT = """
+package(default_visibility = ["//visibility:public"])
+
+exports_files(["config.bzl"])
+"""
+
+_RUST_BUILD_FILE_CONTENT = """
+load("@rules_rust//rust:toolchain.bzl", "rust_stdlib_filegroup")
+
+package(default_visibility = ["//visibility:public"])
+
+# https://github.com/tweag/rules_nixpkgs/blob/master/toolchains/rust/rust.bzl#L33-L116
+filegroup(
+ name = "rustc",
+ srcs = ["bin/rustc"],
+)
+
+filegroup(
+ name = "rustdoc",
+ srcs = ["bin/rustdoc"],
+)
+
+filegroup(
+ name = "rustfmt",
+ srcs = ["bin/rustfmt"],
+)
+
+filegroup(
+ name = "cargo",
+ srcs = ["bin/cargo"],
+)
+
+filegroup(
+ name = "clippy_driver",
+ srcs = ["bin/clippy-driver"],
+)
+
+filegroup(
+ name = "proc_macro_srv",
+ srcs = ["libexec/rust-analyzer-proc-macro-srv"],
+)
+
+filegroup(
+ name = "rustc_lib",
+ srcs = glob(
+ [
+ "bin/*.so",
+ "lib/*.so",
+ "lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/*.so",
+ "lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/*.dylib",
+ "lib/rustlib/x86_64-unknown-linux-gnu/bin/*",
+ "lib/rustlib/x86_64-unknown-linux-gnu/lib/*.so",
+ "lib/rustlib/x86_64-unknown-linux-gnu/lib/*.dylib",
+ ],
+ allow_empty = True,
+ ),
+)
+
+filegroup(
+ name = "rust-src",
+ srcs = glob(["lib/rustlib/src/**/*"]),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-aarch64-apple-darwin",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/aarch64-apple-darwin/lib/*.rlib",
+ "rust/lib/rustlib/aarch64-apple-darwin/lib/*.so",
+ "rust/lib/rustlib/aarch64-apple-darwin/lib/*.dylib",
+ "rust/lib/rustlib/aarch64-apple-darwin/lib/*.a",
+ "rust/lib/rustlib/aarch64-apple-darwin/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-aarch64-apple-ios",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/aarch64-apple-ios/lib/*.rlib",
+ "rust/lib/rustlib/aarch64-apple-ios/lib/*.so",
+ "rust/lib/rustlib/aarch64-apple-ios/lib/*.dylib",
+ "rust/lib/rustlib/aarch64-apple-ios/lib/*.a",
+ "rust/lib/rustlib/aarch64-apple-ios/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-aarch64-linux-android",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/aarch64-linux-android/lib/*.rlib",
+ "rust/lib/rustlib/aarch64-linux-android/lib/*.so",
+ "rust/lib/rustlib/aarch64-linux-android/lib/*.dylib",
+ "rust/lib/rustlib/aarch64-linux-android/lib/*.a",
+ "rust/lib/rustlib/aarch64-linux-android/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-aarch64-unknown-linux-gnu",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/aarch64-unknown-linux-gnu/lib/*.rlib",
+ "rust/lib/rustlib/aarch64-unknown-linux-gnu/lib/*.so",
+ "rust/lib/rustlib/aarch64-unknown-linux-gnu/lib/*.dylib",
+ "rust/lib/rustlib/aarch64-unknown-linux-gnu/lib/*.a",
+ "rust/lib/rustlib/aarch64-unknown-linux-gnu/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-wasm32-unknown-unknown",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/wasm32-unknown-unknown/lib/*.rlib",
+ "rust/lib/rustlib/wasm32-unknown-unknown/lib/*.so",
+ "rust/lib/rustlib/wasm32-unknown-unknown/lib/*.dylib",
+ "rust/lib/rustlib/wasm32-unknown-unknown/lib/*.a",
+ "rust/lib/rustlib/wasm32-unknown-unknown/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-wasm32-wasi",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/wasm32-wasi/lib/*.rlib",
+ "rust/lib/rustlib/wasm32-wasi/lib/*.so",
+ "rust/lib/rustlib/wasm32-wasi/lib/*.dylib",
+ "rust/lib/rustlib/wasm32-wasi/lib/*.a",
+ "rust/lib/rustlib/wasm32-wasi/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-x86_64-apple-darwin",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/x86_64-apple-darwin/lib/*.rlib",
+ "rust/lib/rustlib/x86_64-apple-darwin/lib/*.so",
+ "rust/lib/rustlib/x86_64-apple-darwin/lib/*.dylib",
+ "rust/lib/rustlib/x86_64-apple-darwin/lib/*.a",
+ "rust/lib/rustlib/x86_64-apple-darwin/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-x86_64-pc-windows-msvc",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/x86_64-pc-windows-msvc/lib/*.rlib",
+ "rust/lib/rustlib/x86_64-pc-windows-msvc/lib/*.so",
+ "rust/lib/rustlib/x86_64-pc-windows-msvc/lib/*.dylib",
+ "rust/lib/rustlib/x86_64-pc-windows-msvc/lib/*.a",
+ "rust/lib/rustlib/x86_64-pc-windows-msvc/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+
+rust_stdlib_filegroup(
+ name = "rust_std-x86_64-unknown-linux-gnu",
+ srcs = glob(
+ [
+ "rust/lib/rustlib/x86_64-unknown-linux-gnu/lib/*.rlib",
+ "rust/lib/rustlib/x86_64-unknown-linux-gnu/lib/*.so",
+ "rust/lib/rustlib/x86_64-unknown-linux-gnu/lib/*.dylib",
+ "rust/lib/rustlib/x86_64-unknown-linux-gnu/lib/*.a",
+ "rust/lib/rustlib/x86_64-unknown-linux-gnu/lib/self-contained/**",
+ ],
+ # Some patterns (e.g. `lib/*.a`) don't match anything, see https://github.com/bazelbuild/rules_rust/pull/245
+ allow_empty = True,
+ ),
+)
+"""
+
+_CARGO_BAZEL_BUILD_FILE_CONTENT = """
+package(default_visibility = ["//visibility:public"])
+
+exports_files(["bin/cargo-bazel"])
+"""
+
+def nix_repositories():
+ nixpkgs_flake_package(
+ name = "nix_config",
+ nix_flake_file = "//:flake.nix",
+ nix_flake_lock_file = "//:flake.lock",
+ package = "bazel.config",
+ build_file_content = _CONFIG_BUILD_FILE_CONTENT,
+ )
+
+ nixpkgs_flake_package(
+ name = "nix_rust",
+ nix_flake_file = "//:flake.nix",
+ nix_flake_lock_file = "//:flake.lock",
+ package = "bazel.rust",
+ build_file_content = _RUST_BUILD_FILE_CONTENT,
+ )
+
+ nixpkgs_flake_package(
+ name = "cargo-bazel",
+ nix_flake_file = "//:flake.nix",
+ nix_flake_lock_file = "//:flake.lock",
+ package = "bazel.cargo-bazel",
+ build_file_content = _CARGO_BAZEL_BUILD_FILE_CONTENT,
+ )
diff --git a/examples/nix_cross_compiling/bazel/platforms/BUILD b/examples/nix_cross_compiling/bazel/platforms/BUILD
new file mode 100644
index 0000000000..55f7faca12
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/platforms/BUILD
@@ -0,0 +1,104 @@
+package(default_visibility = ["//visibility:public"])
+
+# Host
+platform(
+ name = "host",
+ constraint_values = ["@platforms//os:nixos"],
+ parents = ["@local_config_platform//:host"],
+)
+
+# Platforms
+platform(
+ name = "aarch64-apple-darwin",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:macos",
+ ],
+)
+
+platform(
+ name = "aarch64-apple-ios",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:ios",
+ ],
+)
+
+platform(
+ name = "aarch64-linux-android",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:android",
+ ],
+)
+
+platform(
+ name = "aarch64-unknown-linux-gnu",
+ constraint_values = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:linux",
+ ],
+)
+
+platform(
+ name = "wasm32-unknown-unknown",
+ constraint_values = [
+ "@platforms//cpu:wasm32",
+ "@platforms//os:none",
+ ],
+)
+
+platform(
+ name = "wasm32-wasi",
+ constraint_values = [
+ "@platforms//cpu:wasm32",
+ "@platforms//os:wasi",
+ ],
+)
+
+platform(
+ name = "x86_64-apple-darwin",
+ constraint_values = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:macos",
+ ],
+)
+
+platform(
+ name = "x86_64-pc-windows-msvc",
+ constraint_values = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:windows",
+ ],
+)
+
+platform(
+ name = "x86_64-unknown-linux-gnu",
+ constraint_values = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:linux",
+ ],
+)
+
+platform(
+ name = "x86_64-unknown-nixos-gnu",
+ constraint_values = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+)
+
+# Sentinel to catch implicit target platform usage
+platform(
+ name = "missing",
+ constraint_values = [
+ ":missing_constraint_value",
+ ],
+)
+
+constraint_setting(name = "missing_constraint_setting")
+
+constraint_value(
+ name = "missing_constraint_value",
+ constraint_setting = ":missing_constraint_setting",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/BUILD b/examples/nix_cross_compiling/bazel/toolchain_rules/BUILD
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/BUILD b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/BUILD
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/clang.bzl b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/clang.bzl
new file mode 100644
index 0000000000..71e5c02d2a
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/clang.bzl
@@ -0,0 +1,188 @@
+load(
+ "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "action_config",
+ "flag_group",
+ "flag_set",
+ "tool",
+ "with_feature_set",
+)
+load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
+
+BAZEL_COMPILE_FLAG_SET = flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-MD", "-MF", "%{dependency_file}"],
+ expand_if_available = "dependency_file",
+ ),
+ flag_group(
+ flags = ["-frandom-seed=%{output_file}"],
+ expand_if_available = "output_file",
+ ),
+ flag_group(
+ flags = ["-D%{preprocessor_defines}"],
+ iterate_over = "preprocessor_defines",
+ ),
+ flag_group(
+ flags = ["-include", "%{includes}"],
+ iterate_over = "includes",
+ expand_if_available = "includes",
+ ),
+ flag_group(
+ flags = ["-iquote", "%{quote_include_paths}"],
+ iterate_over = "quote_include_paths",
+ ),
+ flag_group(
+ flags = ["-I%{include_paths}"],
+ iterate_over = "include_paths",
+ ),
+ flag_group(
+ flags = ["-isystem", "%{system_include_paths}"],
+ iterate_over = "system_include_paths",
+ ),
+ flag_group(
+ flags = ["-isystem", "%{external_include_paths}"],
+ iterate_over = "external_include_paths",
+ expand_if_available = "external_include_paths",
+ ),
+ flag_group(
+ flags = ["%{user_compile_flags}"],
+ iterate_over = "user_compile_flags",
+ expand_if_available = "user_compile_flags",
+ ),
+ flag_group(
+ flags = ["-c", "%{source_file}"],
+ expand_if_available = "source_file",
+ ),
+ flag_group(
+ flags = ["-o", "%{output_file}"],
+ expand_if_available = "output_file",
+ ),
+ ],
+)
+
+def compile_action_configs(
+ clang,
+ target,
+ builtin_include_directories,
+ builtin_framework_directories,
+ compile_flags,
+ dbg_compile_flags,
+ fastbuild_compile_flags,
+ opt_compile_flags,
+ remap_path_prefix):
+ builtin_include_directory_compile_flags = []
+ for builtin_include_directory in builtin_include_directories:
+ builtin_include_directory_compile_flags += ["-isystem", builtin_include_directory]
+
+ builtin_framework_directory_compile_flags = []
+ for builtin_framework_directory in builtin_framework_directories:
+ builtin_framework_directory_compile_flags += ["-iframework", builtin_framework_directory]
+
+ required_compile_flags = ([
+ "--target={}".format(target),
+ "-nostdinc",
+
+ # `unix_cc_toolchain_config`
+ "-Wno-builtin-macro-redefined",
+ "-D__DATE__=\"redacted\"",
+ "-D__TIMESTAMP__=\"redacted\"",
+ "-D__TIME__=\"redacted\"",
+ "-fdebug-prefix-map=${{pwd}}={}".format(remap_path_prefix),
+ ] +
+ builtin_include_directory_compile_flags +
+ builtin_framework_directory_compile_flags)
+ required_compile_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_compile_flags),
+ ] if required_compile_flags else []),
+ )
+
+ compile_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = compile_flags),
+ ] if compile_flags else []),
+ )
+
+ dbg_compile_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = dbg_compile_flags),
+ ] if dbg_compile_flags else []),
+ with_features = [with_feature_set(features = ["dbg"])],
+ )
+
+ fastbuild_compile_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = fastbuild_compile_flags),
+ ] if fastbuild_compile_flags else []),
+ with_features = [with_feature_set(features = ["fastbuild"])],
+ )
+
+ opt_compile_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = opt_compile_flags),
+ ] if opt_compile_flags else []),
+ with_features = [with_feature_set(features = ["opt"])],
+ )
+
+ return [
+ action_config(
+ action_name = ACTION_NAMES.assemble,
+ tools = [tool(path = "{}/bin/clang".format(clang))],
+ flag_sets = [
+ required_compile_flag_set,
+ compile_flag_set,
+ dbg_compile_flag_set,
+ fastbuild_compile_flag_set,
+ opt_compile_flag_set,
+ BAZEL_COMPILE_FLAG_SET,
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.preprocess_assemble,
+ tools = [tool(path = "{}/bin/clang".format(clang))],
+ flag_sets = [
+ required_compile_flag_set,
+ compile_flag_set,
+ dbg_compile_flag_set,
+ fastbuild_compile_flag_set,
+ opt_compile_flag_set,
+ BAZEL_COMPILE_FLAG_SET,
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.c_compile,
+ tools = [tool(path = "{}/bin/clang".format(clang))],
+ flag_sets = [
+ required_compile_flag_set,
+ compile_flag_set,
+ dbg_compile_flag_set,
+ fastbuild_compile_flag_set,
+ opt_compile_flag_set,
+ BAZEL_COMPILE_FLAG_SET,
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_compile,
+ tools = [tool(path = "{}/bin/clang".format(clang))],
+ flag_sets = [
+ required_compile_flag_set,
+ compile_flag_set,
+ dbg_compile_flag_set,
+ fastbuild_compile_flag_set,
+ opt_compile_flag_set,
+ BAZEL_COMPILE_FLAG_SET,
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_header_parsing,
+ tools = [tool(path = "{}/bin/clang".format(clang))],
+ flag_sets = [
+ required_compile_flag_set,
+ compile_flag_set,
+ dbg_compile_flag_set,
+ fastbuild_compile_flag_set,
+ opt_compile_flag_set,
+ BAZEL_COMPILE_FLAG_SET,
+ ],
+ ),
+ ]
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/ld.lld.bzl b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/ld.lld.bzl
new file mode 100644
index 0000000000..7120bf059b
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/ld.lld.bzl
@@ -0,0 +1,286 @@
+load(
+ "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "action_config",
+ "flag_group",
+ "flag_set",
+ "tool",
+ "variable_with_value",
+ "with_feature_set",
+)
+load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
+
+BAZEL_LINK_FLAG_SET = flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["%{linkstamp_paths}"],
+ iterate_over = "linkstamp_paths",
+ expand_if_available = "linkstamp_paths",
+ ),
+ flag_group(
+ iterate_over = "runtime_library_search_directories",
+ flag_groups = [
+ flag_group(
+ flags = [
+ "-Xlinker",
+ "-rpath",
+ "-Xlinker",
+ "$ORIGIN/%{runtime_library_search_directories}",
+ ],
+ ),
+ ],
+ expand_if_available =
+ "runtime_library_search_directories",
+ ),
+ flag_group(
+ flags = ["-L%{library_search_directories}"],
+ iterate_over = "library_search_directories",
+ expand_if_available = "library_search_directories",
+ ),
+ flag_group(
+ iterate_over = "libraries_to_link",
+ flag_groups = [
+ flag_group(
+ flags = ["--start-lib"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ flag_group(
+ flags = ["-whole-archive"],
+ expand_if_true =
+ "libraries_to_link.is_whole_archive",
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.object_files}"],
+ iterate_over = "libraries_to_link.object_files",
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "interface_library",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "static_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-l%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "dynamic_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-l:%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "versioned_dynamic_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-no-whole-archive"],
+ expand_if_true = "libraries_to_link.is_whole_archive",
+ ),
+ flag_group(
+ flags = ["--end-lib"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ ],
+ expand_if_available = "libraries_to_link",
+ ),
+ flag_group(
+ flags = ["@%{thinlto_param_file}"],
+ expand_if_true = "thinlto_param_file",
+ ),
+ flag_group(
+ flags = ["%{user_link_flags}"],
+ iterate_over = "user_link_flags",
+ expand_if_available = "user_link_flags",
+ ),
+ flag_group(
+ flags = ["-o", "%{output_execpath}"],
+ expand_if_available = "output_execpath",
+ ),
+ ],
+)
+
+def link_action_configs(
+ llvm,
+ target,
+ builtin_library_directories,
+ builtin_libraries,
+ builtin_framework_directories,
+ builtin_frameworks,
+ builtin_executable_objects,
+ link_flags,
+ dbg_link_flags,
+ fastbuild_link_flags,
+ opt_link_flags):
+ builtin_library_directory_link_flags = []
+ for builtin_library_directory in builtin_library_directories:
+ builtin_library_directory_link_flags += ["-L", builtin_library_directory]
+
+ builtin_library_link_flags = []
+ for builtin_library in builtin_libraries:
+ builtin_library_link_flags += ["-l{}".format(builtin_library)]
+
+ if builtin_framework_directories:
+ fail("Frameworks not supported by `ld.lld`")
+
+ if builtin_frameworks:
+ fail("Frameworks not supported by `ld.lld`")
+
+ builtin_executable_objects_link_flags = []
+ for builtin_executable_object in builtin_executable_objects:
+ builtin_executable_objects_link_flags += ["-l{}".format(builtin_executable_object)]
+
+ required_link_flags = (["-nostdlib"] +
+ builtin_library_directory_link_flags +
+ builtin_library_link_flags)
+ required_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_link_flags),
+ ] if required_link_flags else []),
+ )
+
+ required_executable_link_flags = (builtin_executable_objects_link_flags)
+ required_executable_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_executable_link_flags),
+ ] if required_executable_link_flags else []),
+ )
+
+ link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = link_flags),
+ ] if link_flags else []),
+ )
+
+ dbg_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = dbg_link_flags),
+ ] if dbg_link_flags else []),
+ with_features = [with_feature_set(features = ["dbg"])],
+ )
+
+ fastbuild_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = fastbuild_link_flags),
+ ] if fastbuild_link_flags else []),
+ with_features = [with_feature_set(features = ["fastbuild"])],
+ )
+
+ opt_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = opt_link_flags),
+ ] if opt_link_flags else []),
+ with_features = [with_feature_set(features = ["opt"])],
+ )
+
+ return [
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_dynamic_library,
+ tools = [tool(path = "{}/bin/ld.lld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-shared"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+ tools = [tool(path = "{}/bin/ld.lld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-shared"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_executable,
+ tools = [tool(path = "{}/bin/ld.lld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ required_executable_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-pie"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ ]
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/ld64.lld.bzl b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/ld64.lld.bzl
new file mode 100644
index 0000000000..8865f7e6d7
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/ld64.lld.bzl
@@ -0,0 +1,282 @@
+load(
+ "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "action_config",
+ "flag_group",
+ "flag_set",
+ "tool",
+ "variable_with_value",
+ "with_feature_set",
+)
+load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
+
+BAZEL_LINK_FLAG_SET = flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["%{linkstamp_paths}"],
+ iterate_over = "linkstamp_paths",
+ expand_if_available = "linkstamp_paths",
+ ),
+ flag_group(
+ iterate_over = "runtime_library_search_directories",
+ flag_groups = [
+ flag_group(
+ flags = [
+ "-Xlinker",
+ "-rpath",
+ "-Xlinker",
+ "$ORIGIN/%{runtime_library_search_directories}",
+ ],
+ ),
+ ],
+ expand_if_available =
+ "runtime_library_search_directories",
+ ),
+ flag_group(
+ flags = ["-L%{library_search_directories}"],
+ iterate_over = "library_search_directories",
+ expand_if_available = "library_search_directories",
+ ),
+ flag_group(
+ iterate_over = "libraries_to_link",
+ flag_groups = [
+ flag_group(
+ flags = ["--start-lib"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ flag_group(
+ flags = ["-whole-archive"],
+ expand_if_true =
+ "libraries_to_link.is_whole_archive",
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.object_files}"],
+ iterate_over = "libraries_to_link.object_files",
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "interface_library",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "static_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-l%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "dynamic_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-l:%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "versioned_dynamic_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-no-whole-archive"],
+ expand_if_true = "libraries_to_link.is_whole_archive",
+ ),
+ flag_group(
+ flags = ["--end-lib"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ ],
+ expand_if_available = "libraries_to_link",
+ ),
+ flag_group(
+ flags = ["@%{thinlto_param_file}"],
+ expand_if_true = "thinlto_param_file",
+ ),
+ flag_group(
+ flags = ["%{user_link_flags}"],
+ iterate_over = "user_link_flags",
+ expand_if_available = "user_link_flags",
+ ),
+ flag_group(
+ flags = ["-o", "%{output_execpath}"],
+ expand_if_available = "output_execpath",
+ ),
+ ],
+)
+
+def link_action_configs(
+ llvm,
+ target,
+ builtin_library_directories,
+ builtin_libraries,
+ builtin_framework_directories,
+ builtin_frameworks,
+ builtin_executable_objects,
+ link_flags,
+ dbg_link_flags,
+ fastbuild_link_flags,
+ opt_link_flags):
+ builtin_library_directory_link_flags = []
+ for builtin_library_directory in builtin_library_directories:
+ builtin_library_directory_link_flags += ["-L", builtin_library_directory]
+
+ builtin_library_link_flags = []
+ for builtin_library in builtin_libraries:
+ builtin_library_link_flags += ["-l{}".format(builtin_library)]
+
+ builtin_framework_directory_link_flags = []
+ for builtin_framework_directory in builtin_framework_directories:
+ builtin_framework_directory_link_flags += ["-F", builtin_framework_directory]
+
+ builtin_framework_link_flags = []
+ for builtin_framework in builtin_frameworks:
+ builtin_framework_link_flags += ["-framework", builtin_framework]
+
+ builtin_executable_objects_link_flags = []
+ for builtin_executable_object in builtin_executable_objects:
+ builtin_executable_objects_link_flags += ["-l{}".format(builtin_executable_object)]
+
+ required_link_flags = (builtin_library_directory_link_flags +
+ builtin_library_link_flags +
+ builtin_framework_directory_link_flags +
+ builtin_framework_link_flags)
+ required_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_link_flags),
+ ] if required_link_flags else []),
+ )
+
+ required_executable_link_flags = (builtin_executable_objects_link_flags)
+ required_executable_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_executable_link_flags),
+ ] if required_executable_link_flags else []),
+ )
+
+ link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = link_flags),
+ ] if link_flags else []),
+ )
+
+ dbg_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = dbg_link_flags),
+ ] if dbg_link_flags else []),
+ with_features = [with_feature_set(features = ["dbg"])],
+ )
+
+ fastbuild_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = fastbuild_link_flags),
+ ] if fastbuild_link_flags else []),
+ with_features = [with_feature_set(features = ["fastbuild"])],
+ )
+
+ opt_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = opt_link_flags),
+ ] if opt_link_flags else []),
+ with_features = [with_feature_set(features = ["opt"])],
+ )
+
+ return [
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_dynamic_library,
+ tools = [tool(path = "{}/bin/ld64.lld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-dylib"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+ tools = [tool(path = "{}/bin/ld64.lld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-dylib"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_executable,
+ tools = [tool(path = "{}/bin/ld64.lld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ required_executable_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ ],
+ ),
+ ]
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/lld-link.bzl b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/lld-link.bzl
new file mode 100644
index 0000000000..81b5c55e46
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/lld-link.bzl
@@ -0,0 +1,279 @@
+load(
+ "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "action_config",
+ "flag_group",
+ "flag_set",
+ "tool",
+ "variable_with_value",
+ "with_feature_set",
+)
+load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
+
+BAZEL_LINK_FLAG_SET = flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["%{linkstamp_paths}"],
+ iterate_over = "linkstamp_paths",
+ expand_if_available = "linkstamp_paths",
+ ),
+ flag_group(
+ iterate_over = "runtime_library_search_directories",
+ flag_groups = [
+ flag_group(
+ flags = [
+ "-Xlinker",
+ "-rpath",
+ "-Xlinker",
+ "$ORIGIN/%{runtime_library_search_directories}",
+ ],
+ ),
+ ],
+ expand_if_available =
+ "runtime_library_search_directories",
+ ),
+ flag_group(
+ flags = ["/libpath:%{library_search_directories}"],
+ iterate_over = "library_search_directories",
+ expand_if_available = "library_search_directories",
+ ),
+ flag_group(
+ iterate_over = "libraries_to_link",
+ flag_groups = [
+ flag_group(
+ flags = ["/start-lib"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.object_files}"],
+ iterate_over = "libraries_to_link.object_files",
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "interface_library",
+ ),
+ ),
+ flag_group(
+ flag_groups = [
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_false = "libraries_to_link.is_whole_archive",
+ ),
+ flag_group(
+ flags = ["/wholearchive:%{libraries_to_link.name}"],
+ expand_if_true = "libraries_to_link.is_whole_archive",
+ ),
+ ],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "static_library",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "dynamic_library",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "versioned_dynamic_library",
+ ),
+ ),
+ flag_group(
+ flags = ["/end-lib"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ ],
+ expand_if_available = "libraries_to_link",
+ ),
+ flag_group(
+ flags = ["@%{thinlto_param_file}"],
+ expand_if_true = "thinlto_param_file",
+ ),
+ flag_group(
+ flags = ["%{user_link_flags}"],
+ iterate_over = "user_link_flags",
+ expand_if_available = "user_link_flags",
+ ),
+ flag_group(
+ flags = ["/out:%{output_execpath}"],
+ expand_if_available = "output_execpath",
+ ),
+ ],
+)
+
+def link_action_configs(
+ llvm,
+ target,
+ builtin_executable_objects,
+ builtin_library_directories,
+ builtin_libraries,
+ builtin_framework_directories,
+ builtin_frameworks,
+ link_flags,
+ dbg_link_flags,
+ fastbuild_link_flags,
+ opt_link_flags):
+ builtin_library_directory_link_flags = []
+ for builtin_library_directory in builtin_library_directories:
+ builtin_library_directory_link_flags += ["/libpath:{}".format(builtin_library_directory)]
+
+ builtin_library_link_flags = []
+ for builtin_library in builtin_libraries:
+ builtin_library_link_flags += [builtin_library]
+
+ if builtin_framework_directories:
+ fail("Frameworks not supported by `lld-link`")
+
+ if builtin_frameworks:
+ fail("Frameworks not supported by `lld-link`")
+
+ builtin_executable_objects_link_flags = []
+ for builtin_executable_object in builtin_executable_objects:
+ builtin_executable_objects_link_flags += [builtin_executable_object]
+
+ required_link_flags = (["/nodefaultlib"] +
+ builtin_library_directory_link_flags +
+ builtin_library_link_flags)
+ required_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_link_flags),
+ ] if required_link_flags else []),
+ )
+
+ required_executable_link_flags = (builtin_executable_objects_link_flags)
+ required_executable_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_executable_link_flags),
+ ] if required_executable_link_flags else []),
+ )
+
+ link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = link_flags),
+ ] if link_flags else []),
+ )
+
+ dbg_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = dbg_link_flags),
+ ] if dbg_link_flags else []),
+ with_features = [with_feature_set(features = ["dbg"])],
+ )
+
+ fastbuild_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = fastbuild_link_flags),
+ ] if fastbuild_link_flags else []),
+ with_features = [with_feature_set(features = ["fastbuild"])],
+ )
+
+ opt_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = opt_link_flags),
+ ] if opt_link_flags else []),
+ with_features = [with_feature_set(features = ["opt"])],
+ )
+
+ return [
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_dynamic_library,
+ tools = [tool(path = "{}/bin/lld-link".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["/dll"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+ tools = [tool(path = "{}/bin/lld-link".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["/dll"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_executable,
+ tools = [tool(path = "{}/bin/lld-link".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ required_executable_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ ],
+ ),
+ ]
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/llvm-ar.bzl b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/llvm-ar.bzl
new file mode 100644
index 0000000000..49bb1d7f1c
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/llvm-ar.bzl
@@ -0,0 +1,64 @@
+load(
+ "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "action_config",
+ "flag_group",
+ "flag_set",
+ "tool",
+ "variable_with_value",
+)
+load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
+
+BASE_ARCHIVER_FLAG_SET = flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-rcsD", "%{output_execpath}"],
+ expand_if_available = "output_execpath",
+ ),
+ flag_group(
+ iterate_over = "libraries_to_link",
+ flag_groups = [
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.object_files}"],
+ iterate_over = "libraries_to_link.object_files",
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ ],
+ expand_if_available = "libraries_to_link",
+ ),
+ ],
+)
+
+def archive_action_configs(llvm, archive_flags):
+ archive_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = archive_flags),
+ ] if archive_flags else []),
+ )
+
+ return [action_config(
+ action_name = ACTION_NAMES.cpp_link_static_library,
+ tools = [tool(path = "{}/bin/llvm-ar".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ archive_flag_set,
+ BASE_ARCHIVER_FLAG_SET,
+ ],
+ )]
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/llvm-strip.bzl b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/llvm-strip.bzl
new file mode 100644
index 0000000000..e5e219914d
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/llvm-strip.bzl
@@ -0,0 +1,30 @@
+load(
+ "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "action_config",
+ "flag_group",
+ "flag_set",
+ "tool",
+)
+load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
+
+def strip_action_configs(llvm):
+ return [action_config(
+ action_name = ACTION_NAMES.strip,
+ tools = [tool(path = "{}/bin/llvm-strip".format(llvm))],
+ flag_sets = [
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-S", "-p", "-o", "%{output_file}"],
+ ),
+ flag_group(
+ iterate_over = "stripopts",
+ flags = ["%{stripopts}"],
+ ),
+ flag_group(
+ flags = ["%{input_file}"],
+ ),
+ ],
+ ),
+ ],
+ )]
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/wasm-ld.bzl b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/wasm-ld.bzl
new file mode 100644
index 0000000000..b2eb031043
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchain_rules/cc_tools/wasm-ld.bzl
@@ -0,0 +1,278 @@
+load(
+ "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "action_config",
+ "flag_group",
+ "flag_set",
+ "tool",
+ "variable_with_value",
+ "with_feature_set",
+)
+load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
+
+BAZEL_LINK_FLAG_SET = flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["%{linkstamp_paths}"],
+ iterate_over = "linkstamp_paths",
+ expand_if_available = "linkstamp_paths",
+ ),
+ flag_group(
+ iterate_over = "runtime_library_search_directories",
+ flag_groups = [
+ flag_group(
+ flags = [
+ "-Xlinker",
+ "-rpath",
+ "-Xlinker",
+ "$ORIGIN/%{runtime_library_search_directories}",
+ ],
+ ),
+ ],
+ expand_if_available =
+ "runtime_library_search_directories",
+ ),
+ flag_group(
+ flags = ["-L%{library_search_directories}"],
+ iterate_over = "library_search_directories",
+ expand_if_available = "library_search_directories",
+ ),
+ flag_group(
+ iterate_over = "libraries_to_link",
+ flag_groups = [
+ flag_group(
+ flags = ["--start-lib"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ flag_group(
+ flags = ["-whole-archive"],
+ expand_if_true =
+ "libraries_to_link.is_whole_archive",
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.object_files}"],
+ iterate_over = "libraries_to_link.object_files",
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "interface_library",
+ ),
+ ),
+ flag_group(
+ flags = ["%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "static_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-l%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "dynamic_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-l:%{libraries_to_link.name}"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "versioned_dynamic_library",
+ ),
+ ),
+ flag_group(
+ flags = ["-no-whole-archive"],
+ expand_if_true = "libraries_to_link.is_whole_archive",
+ ),
+ flag_group(
+ flags = ["--end-lib"],
+ expand_if_equal = variable_with_value(
+ name = "libraries_to_link.type",
+ value = "object_file_group",
+ ),
+ ),
+ ],
+ expand_if_available = "libraries_to_link",
+ ),
+ flag_group(
+ flags = ["@%{thinlto_param_file}"],
+ expand_if_true = "thinlto_param_file",
+ ),
+ flag_group(
+ flags = ["%{user_link_flags}"],
+ iterate_over = "user_link_flags",
+ expand_if_available = "user_link_flags",
+ ),
+ flag_group(
+ flags = ["-o", "%{output_execpath}"],
+ expand_if_available = "output_execpath",
+ ),
+ ],
+)
+
+def link_action_configs(
+ llvm,
+ target,
+ builtin_library_directories,
+ builtin_libraries,
+ builtin_framework_directories,
+ builtin_frameworks,
+ builtin_executable_objects,
+ link_flags,
+ dbg_link_flags,
+ fastbuild_link_flags,
+ opt_link_flags):
+ builtin_library_directory_link_flags = []
+ for builtin_library_directory in builtin_library_directories:
+ builtin_library_directory_link_flags += ["-L", builtin_library_directory]
+
+ builtin_library_link_flags = []
+ for builtin_library in builtin_libraries:
+ builtin_library_link_flags += ["-l{}".format(builtin_library)]
+
+ if builtin_framework_directories:
+ fail("Frameworks not supported by `wasm-ld`")
+
+ if builtin_frameworks:
+ fail("Frameworks not supported by `wasm-ld`")
+
+ builtin_executable_objects_link_flags = []
+ for builtin_executable_object in builtin_executable_objects:
+ builtin_executable_objects_link_flags += ["-l{}".format(builtin_executable_object)]
+
+ required_link_flags = (builtin_library_directory_link_flags +
+ builtin_library_link_flags)
+ required_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_link_flags),
+ ] if required_link_flags else []),
+ )
+
+ required_executable_link_flags = (builtin_executable_objects_link_flags)
+ required_executable_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = required_executable_link_flags),
+ ] if required_executable_link_flags else []),
+ )
+
+ link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = link_flags),
+ ] if link_flags else []),
+ )
+
+ dbg_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = dbg_link_flags),
+ ] if dbg_link_flags else []),
+ with_features = [with_feature_set(features = ["dbg"])],
+ )
+
+ fastbuild_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = fastbuild_link_flags),
+ ] if fastbuild_link_flags else []),
+ with_features = [with_feature_set(features = ["fastbuild"])],
+ )
+
+ opt_link_flag_set = flag_set(
+ flag_groups = ([
+ flag_group(flags = opt_link_flags),
+ ] if opt_link_flags else []),
+ with_features = [with_feature_set(features = ["opt"])],
+ )
+
+ return [
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_dynamic_library,
+ tools = [tool(path = "{}/bin/wasm-ld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-shared"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+ tools = [tool(path = "{}/bin/wasm-ld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["-shared"],
+ ),
+ ],
+ ),
+ ],
+ ),
+ action_config(
+ action_name = ACTION_NAMES.cpp_link_executable,
+ tools = [tool(path = "{}/bin/wasm-ld".format(llvm))],
+ flag_sets = [
+ # Mandatory, no link flags come through on command line.
+ flag_set(
+ flag_groups = [
+ flag_group(
+ flags = ["@%{linker_param_file}"],
+ expand_if_available = "linker_param_file",
+ ),
+ ],
+ ),
+ required_link_flag_set,
+ required_executable_link_flag_set,
+ link_flag_set,
+ dbg_link_flag_set,
+ fastbuild_link_flag_set,
+ opt_link_flag_set,
+ BAZEL_LINK_FLAG_SET,
+ ],
+ ),
+ ]
diff --git a/examples/nix_cross_compiling/bazel/toolchain_rules/llvm_cc_toolchain_config.bzl b/examples/nix_cross_compiling/bazel/toolchain_rules/llvm_cc_toolchain_config.bzl
new file mode 100644
index 0000000000..75bdd0c87e
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchain_rules/llvm_cc_toolchain_config.bzl
@@ -0,0 +1,229 @@
+load(
+ "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "artifact_name_pattern",
+ "feature",
+)
+load("//bazel/toolchain_rules/cc_tools:clang.bzl", clang_compile_action_configs = "compile_action_configs")
+load("//bazel/toolchain_rules/cc_tools:ld.lld.bzl", ld_lld_link_action_configs = "link_action_configs")
+load("//bazel/toolchain_rules/cc_tools:ld64.lld.bzl", ld64_lld_link_action_configs = "link_action_configs")
+load("//bazel/toolchain_rules/cc_tools:lld-link.bzl", lld_link_link_action_configs = "link_action_configs")
+load("//bazel/toolchain_rules/cc_tools:llvm-ar.bzl", llvm_ar_archive_action_configs = "archive_action_configs")
+load("//bazel/toolchain_rules/cc_tools:llvm-strip.bzl", llvm_strip_strip_action_configs = "strip_action_configs")
+load("//bazel/toolchain_rules/cc_tools:wasm-ld.bzl", wasm_ld_link_action_configs = "link_action_configs")
+
+APPLE_ARTIFACT_NAME_PATTERNS = [
+ # Artifact name patterns differ from the defaults only for dynamic libraries.
+ artifact_name_pattern(
+ category_name = "dynamic_library",
+ prefix = "lib",
+ extension = ".dylib",
+ ),
+]
+
+LINUX_ARTIFACT_NAME_PATTERNS = [
+ # Artifact name patterns are the default.
+]
+
+WASM_ARTIFACT_NAME_PATTERNS = [
+ # Artifact name patterns differ from the defaults only for executables.
+ artifact_name_pattern(
+ category_name = "executable",
+ prefix = "",
+ extension = ".wasm",
+ ),
+]
+
+WINDOWS_ARTIFACT_NAME_PATTERNS = [
+ artifact_name_pattern(
+ category_name = "object_file",
+ prefix = "",
+ extension = ".obj",
+ ),
+ artifact_name_pattern(
+ category_name = "static_library",
+ prefix = "",
+ extension = ".lib",
+ ),
+ artifact_name_pattern(
+ category_name = "alwayslink_static_library",
+ prefix = "",
+ extension = ".lo.lib",
+ ),
+ artifact_name_pattern(
+ category_name = "executable",
+ prefix = "",
+ extension = ".exe",
+ ),
+ artifact_name_pattern(
+ category_name = "dynamic_library",
+ prefix = "",
+ extension = ".dll",
+ ),
+ artifact_name_pattern(
+ category_name = "interface_library",
+ prefix = "",
+ extension = ".if.lib",
+ ),
+]
+
+TARGET_CONFIG = {
+ "aarch64-apple-darwin": struct(
+ artifact_name_patterns = APPLE_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = ld64_lld_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+ "aarch64-apple-ios": struct(
+ artifact_name_patterns = APPLE_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = ld64_lld_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+ "aarch64-linux-android": struct(
+ artifact_name_patterns = LINUX_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = ld_lld_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+ "aarch64-unknown-linux-gnu": struct(
+ artifact_name_patterns = LINUX_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = ld_lld_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+ "wasm32-unknown-unknown": struct(
+ artifact_name_patterns = WASM_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = wasm_ld_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+ "wasm32-wasi": struct(
+ artifact_name_patterns = WASM_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = wasm_ld_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+ "x86_64-apple-darwin": struct(
+ artifact_name_patterns = APPLE_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = ld64_lld_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+ "x86_64-pc-windows-msvc": struct(
+ artifact_name_patterns = WINDOWS_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = lld_link_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+ "x86_64-unknown-linux-gnu": struct(
+ artifact_name_patterns = LINUX_ARTIFACT_NAME_PATTERNS,
+ compile_action_configs = clang_compile_action_configs,
+ archive_action_configs = llvm_ar_archive_action_configs,
+ link_action_configs = ld_lld_link_action_configs,
+ strip_action_configs = llvm_strip_strip_action_configs,
+ ),
+}
+
+def _llvm_cc_toolchain_config_impl(ctx):
+ target_config = TARGET_CONFIG[ctx.attr.target]
+
+ compile_action_configs = target_config.compile_action_configs(
+ clang = ctx.attr.clang,
+ target = ctx.attr.target,
+ builtin_include_directories = ctx.attr.builtin_include_directories,
+ builtin_framework_directories = ctx.attr.builtin_framework_directories,
+ compile_flags = ctx.attr.compile_flags,
+ dbg_compile_flags = ctx.attr.dbg_compile_flags,
+ fastbuild_compile_flags = ctx.attr.fastbuild_compile_flags,
+ opt_compile_flags = ctx.attr.opt_compile_flags,
+ remap_path_prefix = ctx.attr.remap_path_prefix,
+ )
+
+ archive_action_configs = target_config.archive_action_configs(
+ llvm = ctx.attr.llvm,
+ archive_flags = ctx.attr.archive_flags,
+ )
+
+ link_action_configs = target_config.link_action_configs(
+ llvm = ctx.attr.llvm,
+ target = ctx.attr.target,
+ builtin_library_directories = ctx.attr.builtin_library_directories,
+ builtin_libraries = ctx.attr.builtin_libraries,
+ builtin_framework_directories = ctx.attr.builtin_framework_directories,
+ builtin_frameworks = ctx.attr.builtin_frameworks,
+ builtin_executable_objects = ctx.attr.builtin_executable_objects,
+ link_flags = ctx.attr.link_flags,
+ dbg_link_flags = ctx.attr.dbg_link_flags,
+ fastbuild_link_flags = ctx.attr.fastbuild_link_flags,
+ opt_link_flags = ctx.attr.opt_link_flags,
+ )
+
+ strip_action_configs = target_config.strip_action_configs(
+ llvm = ctx.attr.llvm,
+ )
+
+ return cc_common.create_cc_toolchain_config_info(
+ ctx = ctx,
+ features = [
+ feature(name = "no_legacy_features", enabled = True),
+ feature(name = "supports_start_end_lib", enabled = ctx.attr.supports_start_end_lib),
+ feature(name = "supports_interface_shared_libraries", enabled = False),
+ feature(name = "supports_dynamic_linker", enabled = True),
+ feature(name = "has_configured_linker_path", enabled = True),
+ feature(name = "static_link_cpp_runtimes", enabled = False),
+ feature(name = "supports_pic", enabled = True),
+ ],
+ action_configs = compile_action_configs +
+ archive_action_configs +
+ link_action_configs +
+ strip_action_configs,
+ artifact_name_patterns = target_config.artifact_name_patterns,
+ cxx_builtin_include_directories = ctx.attr.builtin_include_directories,
+ toolchain_identifier = ctx.attr.name,
+ host_system_name = None,
+ target_system_name = ctx.attr.target,
+ target_cpu = "unused",
+ target_libc = "unused",
+ compiler = "unused",
+ abi_version = None,
+ abi_libc_version = None,
+ tool_paths = [],
+ make_variables = [],
+ builtin_sysroot = None,
+ cc_target_os = None,
+ )
+
+llvm_cc_toolchain_config = rule(
+ implementation = _llvm_cc_toolchain_config_impl,
+ attrs = {
+ "target": attr.string(mandatory = True),
+ "llvm": attr.string(mandatory = True),
+ "clang": attr.string(mandatory = True),
+ "builtin_include_directories": attr.string_list(),
+ "builtin_library_directories": attr.string_list(),
+ "builtin_libraries": attr.string_list(),
+ "builtin_framework_directories": attr.string_list(),
+ "builtin_frameworks": attr.string_list(),
+ "builtin_executable_objects": attr.string_list(),
+ "compile_flags": attr.string_list(),
+ "dbg_compile_flags": attr.string_list(),
+ "fastbuild_compile_flags": attr.string_list(),
+ "opt_compile_flags": attr.string_list(),
+ "link_flags": attr.string_list(),
+ "dbg_link_flags": attr.string_list(),
+ "fastbuild_link_flags": attr.string_list(),
+ "opt_link_flags": attr.string_list(),
+ "archive_flags": attr.string_list(),
+ "remap_path_prefix": attr.string(),
+ "supports_start_end_lib": attr.bool(default = True),
+ },
+ provides = [CcToolchainConfigInfo],
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-apple-darwin/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-apple-darwin/BUILD
new file mode 100644
index 0000000000..e21c95e5dd
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-apple-darwin/BUILD
@@ -0,0 +1,100 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LLVM",
+ "SDK_UNIVERSAL_APPLE_DARWIN",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [],
+ builtin_framework_directories = [
+ "{}/System/Library/Frameworks".format(SDK_UNIVERSAL_APPLE_DARWIN),
+ ],
+ builtin_frameworks = [],
+ builtin_include_directories = [
+ "{}/usr/include/c++/v1".format(SDK_UNIVERSAL_APPLE_DARWIN),
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/usr/include".format(SDK_UNIVERSAL_APPLE_DARWIN),
+ ],
+ builtin_libraries = [],
+ builtin_library_directories = [
+ "{}/usr/lib".format(SDK_UNIVERSAL_APPLE_DARWIN),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [
+ "-g",
+ "-fstandalone-debug",
+ ],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "-fatal_warnings",
+ "-arch",
+ "arm64",
+ "-macos_version_min",
+ "13.0.0",
+ "-platform_version",
+ "macos",
+ "13.0.0",
+ "13.1",
+ "-headerpad_max_install_names",
+ "-undefined",
+ "dynamic_lookup",
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [
+ "-g0",
+ "-O2",
+ "-D_FORTIFY_SOURCE=1",
+ "-DNDEBUG",
+ "-ffunction-sections",
+ "-fdata-sections",
+ ],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ tags = ["manual"],
+ target = "aarch64-apple-darwin",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:macos",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-apple-ios/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-apple-ios/BUILD
new file mode 100644
index 0000000000..5f02ebdac9
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-apple-ios/BUILD
@@ -0,0 +1,98 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LLVM",
+ "SDK_UNIVERSAL_APPLE_IOS",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [],
+ builtin_framework_directories = [
+ "{}/System/Library/Frameworks".format(SDK_UNIVERSAL_APPLE_IOS),
+ ],
+ builtin_frameworks = [],
+ builtin_include_directories = [
+ "{}/usr/include/c++/v1".format(SDK_UNIVERSAL_APPLE_IOS),
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/usr/include".format(SDK_UNIVERSAL_APPLE_IOS),
+ ],
+ builtin_libraries = [],
+ builtin_library_directories = [
+ "{}/usr/lib".format(SDK_UNIVERSAL_APPLE_IOS),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [
+ "-g",
+ "-fstandalone-debug",
+ ],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "-fatal_warnings",
+ "-arch",
+ "arm64",
+ "-platform_version",
+ "ios",
+ "16.0.0",
+ "16.2",
+ "-headerpad_max_install_names",
+ "-undefined",
+ "dynamic_lookup",
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [
+ "-g0",
+ "-O2",
+ "-D_FORTIFY_SOURCE=1",
+ "-DNDEBUG",
+ "-ffunction-sections",
+ "-fdata-sections",
+ ],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ tags = ["manual"],
+ target = "aarch64-apple-ios",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:ios",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-linux-android/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-linux-android/BUILD
new file mode 100644
index 0000000000..c2797b245f
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-linux-android/BUILD
@@ -0,0 +1,113 @@
+load(
+ "@nix_config//:config.bzl",
+ "ANDROID_NDK_VERSION",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LLVM",
+ "SDK_UNIVERSAL_LINUX_ANDROID",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [
+ ":crtbegin_dynamic.o",
+ ":crtend_android.o",
+ ],
+ builtin_include_directories = [
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/local/include".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/aarch64-linux-android".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ ],
+ builtin_libraries = [
+ "c",
+ "dl",
+ "m",
+ "unwind",
+ "stdc++",
+ "c++",
+ "c++abi",
+ ],
+ builtin_library_directories = [
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.7".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.7/lib/linux/aarch64".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/aarch64-linux-android/24".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/aarch64-linux-android".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ "{}/share/android-sdk/ndk/{}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib".format(SDK_UNIVERSAL_LINUX_ANDROID, ANDROID_NDK_VERSION),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-DANDROID",
+ "-D_FORTIFY_SOURCE=2",
+ "-fdata-sections",
+ "-ffunction-sections",
+ "-fno-exceptions",
+ "-fstack-protector-strong",
+ "-funwind-tables",
+ "-no-canonical-prefixes",
+ "-Wall",
+ "-Werror",
+ "-Werror=format-security",
+ "-Wformat",
+ "-Wself-assign",
+ "-Wthread-safety",
+ ],
+ dbg_compile_flags = [
+ "-g",
+ "-fno-limit-debug-info",
+ ],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "--fatal-warnings",
+ "--sysroot={}/toolchains/llvm/prebuilt/linux-x86_64/sysroot".format(SDK_UNIVERSAL_LINUX_ANDROID),
+ "--dynamic-linker=/system/bin/linker64",
+ "--build-id=md5",
+ "--hash-style=gnu",
+ "-z",
+ "relro",
+ "-z",
+ "now",
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ tags = ["manual"],
+ target = "aarch64-linux-android",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:android",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-unknown-linux-gnu/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-unknown-linux-gnu/BUILD
new file mode 100644
index 0000000000..bb390b3588
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/aarch64-unknown-linux-gnu/BUILD
@@ -0,0 +1,102 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LLVM",
+ "SDK_AARCH64_UNKNOWN_LINUX_GNU",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [
+ ":Scrt1.o",
+ ":crti.o",
+ ":crtbeginS.o",
+ ":crtendS.o",
+ ":crtn.o",
+ ],
+ builtin_include_directories = [
+ "{}/usr/include/c++/10".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ "{}/usr/include/aarch64-linux-gnu/c++/10".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ "{}/usr/include/c++/10/backward".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/usr/include/aarch64-linux-gnu".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ "{}/usr/include".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ ],
+ builtin_libraries = [
+ "c",
+ "dl",
+ "gcc_s",
+ "gcc",
+ "m",
+ "pthread",
+ "stdc++",
+ ],
+ builtin_library_directories = [
+ "{}/lib/aarch64-linux-gnu".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ "{}/usr/lib/gcc/aarch64-linux-gnu/10".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ "{}/usr/lib/aarch64-linux-gnu".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "--fatal-warnings",
+ "--sysroot={}".format(SDK_AARCH64_UNKNOWN_LINUX_GNU),
+ "--dynamic-linker=/lib64/ld-linux-aarch64.so.1",
+ "--build-id=md5",
+ "--hash-style=gnu",
+ "-z",
+ "relro",
+ "-z",
+ "now",
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ tags = ["manual"],
+ target = "aarch64-unknown-linux-gnu",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:linux",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/wasm32-unknown-unknown/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/wasm32-unknown-unknown/BUILD
new file mode 100644
index 0000000000..24be2e24e6
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/wasm32-unknown-unknown/BUILD
@@ -0,0 +1,74 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LIBCLANG_RT_WASM32",
+ "LLVM",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [],
+ builtin_include_directories = [
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ ],
+ builtin_libraries = [],
+ builtin_library_directories = [],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "--fatal-warnings",
+ # `wasm-ld` doesn't respect the verbatim `-l:` syntax.
+ "{}/lib/wasi/libclang_rt.builtins-wasm32.a".format(LIBCLANG_RT_WASM32),
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ supports_start_end_lib = False,
+ tags = ["manual"],
+ target = "wasm32-unknown-unknown",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:wasm32",
+ "@platforms//os:none",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/wasm32-wasi/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/wasm32-wasi/BUILD
new file mode 100644
index 0000000000..6c3e032cd7
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/wasm32-wasi/BUILD
@@ -0,0 +1,85 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LIBCLANG_RT_WASM32",
+ "LLVM",
+ "SDK_WASM32_WASI",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [],
+ builtin_include_directories = [
+ "{}/wasi-sysroot/include/c++/v1".format(SDK_WASM32_WASI),
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/wasi-sysroot/include".format(SDK_WASM32_WASI),
+ ],
+ builtin_libraries = [
+ "c",
+ "c++",
+ "c++abi",
+ "m",
+ ],
+ builtin_library_directories = [
+ "{}/wasi-sysroot/lib/wasm32-wasi".format(SDK_WASM32_WASI),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "--fatal-warnings",
+ # `wasm-ld` doesn't respect the verbatim `-l:` syntax.
+ "{}/lib/wasi/libclang_rt.builtins-wasm32.a".format(LIBCLANG_RT_WASM32),
+ "{}/wasi-sysroot/lib/wasm32-wasi/crt1.o".format(SDK_WASM32_WASI),
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ supports_start_end_lib = False,
+ tags = ["manual"],
+ target = "wasm32-wasi",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:wasm32",
+ "@platforms//os:wasi",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-apple-darwin/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-apple-darwin/BUILD
new file mode 100644
index 0000000000..2b5eb334bb
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-apple-darwin/BUILD
@@ -0,0 +1,100 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LLVM",
+ "SDK_UNIVERSAL_APPLE_DARWIN",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [],
+ builtin_framework_directories = [
+ "{}/System/Library/Frameworks".format(SDK_UNIVERSAL_APPLE_DARWIN),
+ ],
+ builtin_frameworks = [],
+ builtin_include_directories = [
+ "{}/usr/include/c++/v1".format(SDK_UNIVERSAL_APPLE_DARWIN),
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/usr/include".format(SDK_UNIVERSAL_APPLE_DARWIN),
+ ],
+ builtin_libraries = [],
+ builtin_library_directories = [
+ "{}/usr/lib".format(SDK_UNIVERSAL_APPLE_DARWIN),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [
+ "-g",
+ "-fstandalone-debug",
+ ],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "-fatal_warnings",
+ "-arch",
+ "x86_64",
+ "-macos_version_min",
+ "13.0.0",
+ "-platform_version",
+ "macos",
+ "13.0.0",
+ "13.1",
+ "-headerpad_max_install_names",
+ "-undefined",
+ "dynamic_lookup",
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [
+ "-g0",
+ "-O2",
+ "-D_FORTIFY_SOURCE=1",
+ "-DNDEBUG",
+ "-ffunction-sections",
+ "-fdata-sections",
+ ],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ tags = ["manual"],
+ target = "x86_64-apple-darwin",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:macos",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-pc-windows-msvc/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-pc-windows-msvc/BUILD
new file mode 100644
index 0000000000..481e468f56
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-pc-windows-msvc/BUILD
@@ -0,0 +1,92 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LLVM",
+ "SDK_X86_64_PC_WINDOWS_MSVC",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [],
+ builtin_include_directories = [
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/crt/include".format(SDK_X86_64_PC_WINDOWS_MSVC),
+ "{}/sdk/include/ucrt".format(SDK_X86_64_PC_WINDOWS_MSVC),
+ "{}/sdk/include/shared".format(SDK_X86_64_PC_WINDOWS_MSVC),
+ "{}/sdk/include/um".format(SDK_X86_64_PC_WINDOWS_MSVC),
+ "{}/sdk/include/winrt".format(SDK_X86_64_PC_WINDOWS_MSVC),
+ ],
+ builtin_libraries = [
+ "advapi32.lib",
+ "bcrypt.lib",
+ "kernel32.lib",
+ "libcmt.lib",
+ "libcpmt.lib",
+ "libucrt.lib",
+ "libvcruntime.lib",
+ "ntdll.lib",
+ "userenv.lib",
+ "uuid.lib",
+ "ws2_32.lib",
+ ],
+ builtin_library_directories = [
+ "{}/crt/lib/x86_64".format(SDK_X86_64_PC_WINDOWS_MSVC),
+ "{}/sdk/lib/um/x86_64".format(SDK_X86_64_PC_WINDOWS_MSVC),
+ "{}/sdk/lib/ucrt/x86_64".format(SDK_X86_64_PC_WINDOWS_MSVC),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "/wx", # Treat warnings as errors
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [],
+ opt_link_flags = [
+ "/opt:icf,ref",
+ ],
+ tags = ["manual"],
+ target = "x86_64-pc-windows-msvc",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:windows",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-unknown-linux-gnu/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-unknown-linux-gnu/BUILD
new file mode 100644
index 0000000000..fe72ac8786
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-unknown-linux-gnu/BUILD
@@ -0,0 +1,102 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LLVM",
+ "SDK_X86_64_UNKNOWN_LINUX_GNU",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [
+ ":Scrt1.o",
+ ":crti.o",
+ ":crtbeginS.o",
+ ":crtendS.o",
+ ":crtn.o",
+ ],
+ builtin_include_directories = [
+ "{}/usr/include/c++/10".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ "{}/usr/include/x86_64-linux-gnu/c++/10".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ "{}/usr/include/c++/10/backward".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/usr/include/x86_64-linux-gnu".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ "{}/usr/include".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ ],
+ builtin_libraries = [
+ "c",
+ "dl",
+ "gcc_s",
+ "gcc",
+ "m",
+ "pthread",
+ "stdc++",
+ ],
+ builtin_library_directories = [
+ "{}/lib/x86_64-linux-gnu".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ "{}/usr/lib/gcc/x86_64-linux-gnu/10".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ "{}/usr/lib/x86_64-linux-gnu".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "--fatal-warnings",
+ "--sysroot={}".format(SDK_X86_64_UNKNOWN_LINUX_GNU),
+ "--dynamic-linker=/lib64/ld-linux-x86-64.so.2",
+ "--build-id=md5",
+ "--hash-style=gnu",
+ "-z",
+ "relro",
+ "-z",
+ "now",
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ tags = ["manual"],
+ target = "x86_64-unknown-linux-gnu",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:linux",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-unknown-nixos-gnu/BUILD b/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-unknown-nixos-gnu/BUILD
new file mode 100644
index 0000000000..3bfe4bf7d5
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/cc/x86_64-unknown-nixos-gnu/BUILD
@@ -0,0 +1,98 @@
+load(
+ "@nix_config//:config.bzl",
+ "CLANG",
+ "CLANG_LIB",
+ "CLANG_LIB_VERSION",
+ "LLVM",
+ "NIXOS_DYNAMIC_LINKER",
+ "SDK_X86_64_UNKNOWN_NIXOS_GNU",
+)
+load("//bazel/toolchain_rules:llvm_cc_toolchain_config.bzl", "llvm_cc_toolchain_config")
+
+llvm_cc_toolchain_config(
+ name = "cc_toolchain_config",
+ archive_flags = [],
+ builtin_executable_objects = [
+ ":Scrt1.o",
+ ":crti.o",
+ ":crtbeginS.o",
+ ":crtendS.o",
+ ":crtn.o",
+ ],
+ builtin_include_directories = [
+ "{}/include/c++/v1".format(SDK_X86_64_UNKNOWN_NIXOS_GNU),
+ "{}/lib/clang/{}/include".format(CLANG_LIB, CLANG_LIB_VERSION),
+ "{}/include".format(SDK_X86_64_UNKNOWN_NIXOS_GNU),
+ ],
+ builtin_libraries = [
+ ":libunwind.a",
+ ":libc.so",
+ ":libc++.a",
+ ":libc++abi.a",
+ "dl",
+ "m",
+ "pthread",
+ ],
+ builtin_library_directories = [
+ "{}/lib".format(SDK_X86_64_UNKNOWN_NIXOS_GNU),
+ "{}/lib/gcc/x86_64-unknown-linux-gnu/13.2.0".format(SDK_X86_64_UNKNOWN_NIXOS_GNU),
+ ],
+ clang = CLANG,
+ compile_flags = [
+ "-fno-exceptions",
+ "-Werror",
+ "-Wall",
+ "-Wthread-safety",
+ "-Wself-assign",
+ ],
+ dbg_compile_flags = [],
+ dbg_link_flags = [],
+ fastbuild_compile_flags = [],
+ fastbuild_link_flags = [],
+ link_flags = [
+ "--fatal-warnings",
+ "--dynamic-linker={}".format(NIXOS_DYNAMIC_LINKER),
+ "--build-id=md5",
+ "--hash-style=gnu",
+ "-z",
+ "relro",
+ "-z",
+ "now",
+ ],
+ llvm = LLVM,
+ opt_compile_flags = [],
+ opt_link_flags = [
+ "--gc-sections",
+ ],
+ tags = ["manual"],
+ target = "x86_64-unknown-linux-gnu",
+)
+
+cc_toolchain(
+ name = "cc_toolchain",
+ all_files = "@nix_config//:config.bzl",
+ ar_files = "@nix_config//:config.bzl",
+ as_files = "@nix_config//:config.bzl",
+ compiler_files = "@nix_config//:config.bzl",
+ coverage_files = "@nix_config//:config.bzl",
+ dwp_files = "@nix_config//:config.bzl",
+ linker_files = "@nix_config//:config.bzl",
+ objcopy_files = "@nix_config//:config.bzl",
+ strip_files = "@nix_config//:config.bzl",
+ tags = ["manual"],
+ toolchain_config = "cc_toolchain_config",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ toolchain = ":cc_toolchain",
+ toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-apple-darwin/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-apple-darwin/BUILD
new file mode 100644
index 0000000000..ee0f84bac2
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-apple-darwin/BUILD
@@ -0,0 +1,43 @@
+load("@nix_config//:config.bzl", "SDK_UNIVERSAL_APPLE_DARWIN")
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = "",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".so",
+ env = {
+ "SDKROOT": SDK_UNIVERSAL_APPLE_DARWIN,
+ },
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [
+ "-Clinker-flavor=ld64.lld",
+ ],
+ extra_rustc_flags = [
+ "-Clinker-flavor=ld64.lld",
+ ],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-aarch64-apple-darwin",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "aarch64-apple-darwin",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:macos",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-apple-ios/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-apple-ios/BUILD
new file mode 100644
index 0000000000..d0ae508179
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-apple-ios/BUILD
@@ -0,0 +1,43 @@
+load("@nix_config//:config.bzl", "SDK_UNIVERSAL_APPLE_IOS")
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = "",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".so",
+ env = {
+ "SDKROOT": SDK_UNIVERSAL_APPLE_IOS,
+ },
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [
+ "-Clinker-flavor=ld64.lld",
+ ],
+ extra_rustc_flags = [
+ "-Clinker-flavor=ld64.lld",
+ ],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-aarch64-apple-ios",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "aarch64-apple-ios",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:ios",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-linux-android/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-linux-android/BUILD
new file mode 100644
index 0000000000..3c56b48333
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-linux-android/BUILD
@@ -0,0 +1,36 @@
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = "",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".so",
+ env = {},
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [],
+ extra_rustc_flags = [],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-aarch64-linux-android",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "aarch64-linux-android",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:android",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-unknown-linux-gnu/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-unknown-linux-gnu/BUILD
new file mode 100644
index 0000000000..215b7d74d1
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/aarch64-unknown-linux-gnu/BUILD
@@ -0,0 +1,36 @@
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = "",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".so",
+ env = {},
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [],
+ extra_rustc_flags = [],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-aarch64-unknown-linux-gnu",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "aarch64-unknown-linux-gnu",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:aarch64",
+ "@platforms//os:linux",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/wasm32-unknown-unknown/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/wasm32-unknown-unknown/BUILD
new file mode 100644
index 0000000000..409d1dfe1a
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/wasm32-unknown-unknown/BUILD
@@ -0,0 +1,36 @@
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = ".wasm",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".so",
+ env = {},
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [],
+ extra_rustc_flags = [],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-wasm32-unknown-unknown",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "wasm32-unknown-unknown",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:wasm32",
+ "@platforms//os:none",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/wasm32-wasi/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/wasm32-wasi/BUILD
new file mode 100644
index 0000000000..f9494a07af
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/wasm32-wasi/BUILD
@@ -0,0 +1,36 @@
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = ".wasm",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".so",
+ env = {},
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [],
+ extra_rustc_flags = [],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-wasm32-wasi",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "wasm32-wasi",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:wasm32",
+ "@platforms//os:wasi",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-apple-darwin/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-apple-darwin/BUILD
new file mode 100644
index 0000000000..9ad447eefa
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-apple-darwin/BUILD
@@ -0,0 +1,43 @@
+load("@nix_config//:config.bzl", "SDK_UNIVERSAL_APPLE_DARWIN")
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = "",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".dylib",
+ env = {
+ "SDKROOT": SDK_UNIVERSAL_APPLE_DARWIN,
+ },
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [
+ "-Clinker-flavor=ld64.lld",
+ ],
+ extra_rustc_flags = [
+ "-Clinker-flavor=ld64.lld",
+ ],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-x86_64-apple-darwin",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "x86_64-apple-darwin",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:macos",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-pc-windows-msvc/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-pc-windows-msvc/BUILD
new file mode 100644
index 0000000000..d03d580879
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-pc-windows-msvc/BUILD
@@ -0,0 +1,36 @@
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = ".exe",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".dll",
+ env = {},
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [],
+ extra_rustc_flags = [],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-x86_64-pc-windows-msvc",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".lib",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "x86_64-pc-windows-msvc",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:windows",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-unknown-linux-gnu/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-unknown-linux-gnu/BUILD
new file mode 100644
index 0000000000..3a79e39705
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-unknown-linux-gnu/BUILD
@@ -0,0 +1,36 @@
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = "",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".so",
+ env = {},
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [],
+ extra_rustc_flags = [],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-x86_64-unknown-linux-gnu",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "x86_64-unknown-linux-gnu",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:linux",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-unknown-nixos-gnu/BUILD b/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-unknown-nixos-gnu/BUILD
new file mode 100644
index 0000000000..d237d28fbc
--- /dev/null
+++ b/examples/nix_cross_compiling/bazel/toolchains/rust/x86_64-unknown-nixos-gnu/BUILD
@@ -0,0 +1,36 @@
+load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
+
+rust_toolchain(
+ name = "rust_toolchain",
+ binary_ext = "",
+ cargo = "@nix_rust//:cargo",
+ clippy_driver = "@nix_rust//:clippy_driver",
+ default_edition = "2021",
+ dylib_ext = ".so",
+ env = {},
+ exec_triple = "x86_64-unknown-nixos-gnu",
+ extra_exec_rustc_flags = [],
+ extra_rustc_flags = [],
+ rust_doc = "@nix_rust//:rustdoc",
+ rust_std = "@nix_rust//:rust_std-x86_64-unknown-linux-gnu",
+ rustc = "@nix_rust//:rustc",
+ rustc_lib = "@nix_rust//:rustc_lib",
+ staticlib_ext = ".a",
+ stdlib_linkflags = [],
+ tags = ["manual"],
+ target_triple = "x86_64-unknown-linux-gnu",
+)
+
+toolchain(
+ name = "toolchain",
+ exec_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ target_compatible_with = [
+ "@platforms//cpu:x86_64",
+ "@platforms//os:nixos",
+ ],
+ toolchain = ":rust_toolchain",
+ toolchain_type = "@rules_rust//rust:toolchain_type",
+)
diff --git a/examples/nix_cross_compiling/cc_binary/BUILD b/examples/nix_cross_compiling/cc_binary/BUILD
new file mode 100644
index 0000000000..e769f2d690
--- /dev/null
+++ b/examples/nix_cross_compiling/cc_binary/BUILD
@@ -0,0 +1,15 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_binary(
+ name = "cc_binary",
+ srcs = select({
+ # See comment in `cc_binary_wasm32.cc`.
+ "@platforms//os:none": ["cc_binary_wasm32-unknown-unknown.cc"],
+ "//conditions:default": ["cc_binary.cc"],
+ }),
+ tags = ["platform_missing"],
+ deps = [
+ "//cc_library",
+ "//rust_library:rust_library_cc",
+ ],
+)
diff --git a/examples/nix_cross_compiling/cc_binary/cc_binary.cc b/examples/nix_cross_compiling/cc_binary/cc_binary.cc
new file mode 100644
index 0000000000..26a84be72a
--- /dev/null
+++ b/examples/nix_cross_compiling/cc_binary/cc_binary.cc
@@ -0,0 +1,13 @@
+#include
+
+#include
+
+extern "C" int cc_double_value(int value);
+extern "C" int rust_double_value(int value);
+
+int main() {
+ printf("Hello World!\n");
+ std::cout << "CC: " << cc_double_value(5) << std::endl;
+ std::cout << "Rust: " << rust_double_value(5) << std::endl;
+ return 0;
+}
diff --git a/examples/nix_cross_compiling/cc_binary/cc_binary_wasm32-unknown-unknown.cc b/examples/nix_cross_compiling/cc_binary/cc_binary_wasm32-unknown-unknown.cc
new file mode 100644
index 0000000000..2a1959e548
--- /dev/null
+++ b/examples/nix_cross_compiling/cc_binary/cc_binary_wasm32-unknown-unknown.cc
@@ -0,0 +1,10 @@
+extern "C" int cc_double_value(int value);
+extern "C" int rust_double_value(int value);
+
+// `wasm32-unknown-unknown` is very barebones, so we have to define `_start()`
+// and we don't have access to `stdio.h` or `iostream`, so we can't output
+// anything, but we can still call the functions.
+extern "C" void _start() {
+ cc_double_value(5);
+ rust_double_value(5);
+}
diff --git a/examples/nix_cross_compiling/cc_library/BUILD b/examples/nix_cross_compiling/cc_library/BUILD
new file mode 100644
index 0000000000..6860c546b3
--- /dev/null
+++ b/examples/nix_cross_compiling/cc_library/BUILD
@@ -0,0 +1,9 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+ name = "cc_library",
+ srcs = ["cc_library.cc"],
+ linkstatic = True,
+ tags = ["platform_missing"],
+ deps = [],
+)
diff --git a/examples/nix_cross_compiling/cc_library/cc_library.cc b/examples/nix_cross_compiling/cc_library/cc_library.cc
new file mode 100644
index 0000000000..2153c0d096
--- /dev/null
+++ b/examples/nix_cross_compiling/cc_library/cc_library.cc
@@ -0,0 +1 @@
+extern "C" int cc_double_value(int value) { return value * 2; }
diff --git a/examples/nix_cross_compiling/flake.lock b/examples/nix_cross_compiling/flake.lock
new file mode 100644
index 0000000000..862cec1484
--- /dev/null
+++ b/examples/nix_cross_compiling/flake.lock
@@ -0,0 +1,265 @@
+{
+ "nodes": {
+ "android-nixpkgs": {
+ "inputs": {
+ "devshell": "devshell",
+ "flake-utils": "flake-utils",
+ "nixpkgs": [
+ "nixpkgs"
+ ]
+ },
+ "locked": {
+ "lastModified": 1699906521,
+ "narHash": "sha256-y3wil4k2hFPs6Mu3nh20G6sA0fJbjOln6cMThnzMGtQ=",
+ "owner": "tadfisher",
+ "repo": "android-nixpkgs",
+ "rev": "1d4aa9a9af71623ff9da4764772abafe28c2d6e4",
+ "type": "github"
+ },
+ "original": {
+ "owner": "tadfisher",
+ "repo": "android-nixpkgs",
+ "type": "github"
+ }
+ },
+ "devshell": {
+ "inputs": {
+ "nixpkgs": [
+ "android-nixpkgs",
+ "nixpkgs"
+ ],
+ "systems": "systems"
+ },
+ "locked": {
+ "lastModified": 1698410321,
+ "narHash": "sha256-MphuSlgpmKwtJncGMohryHiK55J1n6WzVQ/OAfmfoMc=",
+ "owner": "numtide",
+ "repo": "devshell",
+ "rev": "1aed986e3c81a4f6698e85a7452cbfcc4b31a36e",
+ "type": "github"
+ },
+ "original": {
+ "owner": "numtide",
+ "repo": "devshell",
+ "type": "github"
+ }
+ },
+ "fenix": {
+ "inputs": {
+ "nixpkgs": [
+ "nixpkgs"
+ ],
+ "rust-analyzer-src": "rust-analyzer-src"
+ },
+ "locked": {
+ "lastModified": 1699856538,
+ "narHash": "sha256-Fr3ehKE3ruGUKDzq/rb48N7oLarA3a5nROMjP8O13/o=",
+ "owner": "nix-community",
+ "repo": "fenix",
+ "rev": "6807e7b6e855a095a3d0cb35e6cfa6935f384085",
+ "type": "github"
+ },
+ "original": {
+ "owner": "nix-community",
+ "repo": "fenix",
+ "type": "github"
+ }
+ },
+ "fenix_2": {
+ "inputs": {
+ "nixpkgs": [
+ "rules_rust",
+ "nixpkgs"
+ ],
+ "rust-analyzer-src": "rust-analyzer-src_2"
+ },
+ "locked": {
+ "lastModified": 1686896497,
+ "narHash": "sha256-IphIS1KpiFXp/j0v7mEMhtw51uvU5F0mqF2j4//7VAA=",
+ "owner": "nix-community",
+ "repo": "fenix",
+ "rev": "9c69d11badcd78710d7d8665bc3d2e1adc450ffe",
+ "type": "github"
+ },
+ "original": {
+ "owner": "nix-community",
+ "repo": "fenix",
+ "type": "github"
+ }
+ },
+ "flake-utils": {
+ "inputs": {
+ "systems": "systems_2"
+ },
+ "locked": {
+ "lastModified": 1694529238,
+ "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+ "owner": "numtide",
+ "repo": "flake-utils",
+ "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+ "type": "github"
+ },
+ "original": {
+ "owner": "numtide",
+ "repo": "flake-utils",
+ "type": "github"
+ }
+ },
+ "flake-utils_2": {
+ "inputs": {
+ "systems": "systems_3"
+ },
+ "locked": {
+ "lastModified": 1685518550,
+ "narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
+ "owner": "numtide",
+ "repo": "flake-utils",
+ "rev": "a1720a10a6cfe8234c0e93907ffe81be440f4cef",
+ "type": "github"
+ },
+ "original": {
+ "owner": "numtide",
+ "repo": "flake-utils",
+ "type": "github"
+ }
+ },
+ "nixpkgs": {
+ "locked": {
+ "lastModified": 1699725108,
+ "narHash": "sha256-NTiPW4jRC+9puakU4Vi8WpFEirhp92kTOSThuZke+FA=",
+ "owner": "NixOS",
+ "repo": "nixpkgs",
+ "rev": "911ad1e67f458b6bcf0278fa85e33bb9924fed7e",
+ "type": "github"
+ },
+ "original": {
+ "owner": "NixOS",
+ "ref": "nixpkgs-unstable",
+ "repo": "nixpkgs",
+ "type": "github"
+ }
+ },
+ "nixpkgs_2": {
+ "locked": {
+ "lastModified": 1686869522,
+ "narHash": "sha256-tbJ9B8WLCTnVP/LwESRlg0dII6Zyg2LmUU/mB9Lu98E=",
+ "owner": "NixOS",
+ "repo": "nixpkgs",
+ "rev": "7c67f006ea0e7d0265f16d7df07cc076fdffd91f",
+ "type": "github"
+ },
+ "original": {
+ "owner": "NixOS",
+ "ref": "nixos-unstable",
+ "repo": "nixpkgs",
+ "type": "github"
+ }
+ },
+ "root": {
+ "inputs": {
+ "android-nixpkgs": "android-nixpkgs",
+ "fenix": "fenix",
+ "nixpkgs": "nixpkgs",
+ "rules_rust": "rules_rust"
+ }
+ },
+ "rules_rust": {
+ "inputs": {
+ "fenix": "fenix_2",
+ "flake-utils": "flake-utils_2",
+ "nixpkgs": "nixpkgs_2"
+ },
+ "locked": {
+ "lastModified": 0,
+ "narHash": "sha256-/0m/XSTcee0sB4Q84BGVe8AJ41BhX+fo85Ud9F7qLoc=",
+ "path": "../..",
+ "type": "path"
+ },
+ "original": {
+ "path": "../..",
+ "type": "path"
+ }
+ },
+ "rust-analyzer-src": {
+ "flake": false,
+ "locked": {
+ "lastModified": 1699808862,
+ "narHash": "sha256-gjMqmlCvLVlptL35HHvALrOKrFyxjg5hryXbbpVyoeY=",
+ "owner": "rust-lang",
+ "repo": "rust-analyzer",
+ "rev": "416e9c856a792ce2214c449677ca0a1f38965248",
+ "type": "github"
+ },
+ "original": {
+ "owner": "rust-lang",
+ "ref": "nightly",
+ "repo": "rust-analyzer",
+ "type": "github"
+ }
+ },
+ "rust-analyzer-src_2": {
+ "flake": false,
+ "locked": {
+ "lastModified": 1686818168,
+ "narHash": "sha256-yyoJmC17T6mXqthzgGiTKSdUJ0cTEuqQmkmd3iW4ay8=",
+ "owner": "rust-lang",
+ "repo": "rust-analyzer",
+ "rev": "ff864fbb9fc21f0cdae408fe8f5b2f43141b45a7",
+ "type": "github"
+ },
+ "original": {
+ "owner": "rust-lang",
+ "ref": "nightly",
+ "repo": "rust-analyzer",
+ "type": "github"
+ }
+ },
+ "systems": {
+ "locked": {
+ "lastModified": 1681028828,
+ "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+ "owner": "nix-systems",
+ "repo": "default",
+ "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+ "type": "github"
+ },
+ "original": {
+ "owner": "nix-systems",
+ "repo": "default",
+ "type": "github"
+ }
+ },
+ "systems_2": {
+ "locked": {
+ "lastModified": 1681028828,
+ "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+ "owner": "nix-systems",
+ "repo": "default",
+ "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+ "type": "github"
+ },
+ "original": {
+ "owner": "nix-systems",
+ "repo": "default",
+ "type": "github"
+ }
+ },
+ "systems_3": {
+ "locked": {
+ "lastModified": 1681028828,
+ "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+ "owner": "nix-systems",
+ "repo": "default",
+ "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+ "type": "github"
+ },
+ "original": {
+ "owner": "nix-systems",
+ "repo": "default",
+ "type": "github"
+ }
+ }
+ },
+ "root": "root",
+ "version": 7
+}
diff --git a/examples/nix_cross_compiling/flake.nix b/examples/nix_cross_compiling/flake.nix
new file mode 100644
index 0000000000..6679a92986
--- /dev/null
+++ b/examples/nix_cross_compiling/flake.nix
@@ -0,0 +1,176 @@
+{
+ inputs = {
+ nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+ fenix = {
+ url = "github:nix-community/fenix";
+ inputs.nixpkgs.follows = "nixpkgs";
+ };
+
+ android-nixpkgs = {
+ url = "github:tadfisher/android-nixpkgs";
+ inputs.nixpkgs.follows = "nixpkgs";
+ };
+
+ rules_rust = {
+ url = "path:../..";
+ };
+ };
+
+ outputs = { self, nixpkgs, fenix, android-nixpkgs, rules_rust, ... }:
+ let
+ pkgs = import nixpkgs { system = "x86_64-linux"; };
+
+ llvm = pkgs.llvmPackages_16;
+
+ rust = with fenix.packages."x86_64-linux"; combine [
+ complete.cargo
+ complete.clippy
+ complete.rustc
+ complete.rustfmt
+ complete.rust-src
+ complete.rust-analyzer
+ targets."aarch64-apple-darwin".latest.rust-std
+ targets."aarch64-apple-ios".latest.rust-std
+ targets."aarch64-linux-android".latest.rust-std
+ targets."aarch64-unknown-linux-gnu".latest.rust-std
+ targets."wasm32-unknown-unknown".latest.rust-std
+ targets."wasm32-wasi".latest.rust-std
+ targets."x86_64-apple-darwin".latest.rust-std
+ targets."x86_64-pc-windows-msvc".latest.rust-std
+ targets."x86_64-unknown-linux-gnu".latest.rust-std
+ ];
+
+ fetchVendor = { name, url, sha256, stripComponents ? 0 }:
+ let
+ authorization =
+ if (pkgs.lib.hasPrefix "https://raw.githubusercontent.com//" url) then
+ ''-H "Authorization: Bearer "''
+ else
+ "";
+ in
+ pkgs.runCommandLocal "vendor-${name}"
+ {
+ buildInputs = [ pkgs.cacert ];
+ outputHashMode = "recursive";
+ outputHashAlgo = "sha256";
+ outputHash = sha256;
+ } ''
+ # Empty URL special cased for example
+ mkdir --parents $out
+ if [ -n "${url}" ]; then
+ ${pkgs.curl}/bin/curl -s -S -L ${authorization} "${url}" | ${pkgs.libarchive}/bin/bsdtar -C $out -xf - --strip-components ${toString stripComponents}
+ fi
+ '';
+
+ libclang_rt_wasm32 = fetchVendor {
+ name = "libclang_rt_wasm32";
+ url = "https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-20/libclang_rt.builtins-wasm32-wasi-20.0.tar.gz";
+ sha256 = "AdRe1XrGeBuai1p5IMUTR7T7nhNlD1RZ8grZjVoHAKs=";
+ };
+
+ sdk_aarch64-unknown-linux-gnu = fetchVendor {
+ name = "sdk_aarch64-unknown-linux-gnu";
+ url = "https://commondatastorage.googleapis.com/chrome-linux-sysroot/toolchain/80fc74e431f37f590d0c85f16a9d8709088929e8/debian_bullseye_arm64_sysroot.tar.xz";
+ sha256 = "VwHx6SjTmnGWvEoevjThR2oxNEe9NIdnSIJ9RBgKPE8=";
+ };
+
+ sdk_universal-apple-darwin = fetchVendor {
+ name = "sdk_universal-apple-darwin";
+ url = ""; # User needs to supply.
+ sha256 = "pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo="; # User needs to supply.
+ };
+
+ sdk_universal-apple-ios = fetchVendor {
+ name = "sdk_universal-apple-ios";
+ url = ""; # User needs to supply.
+ sha256 = "pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo="; # User needs to supply.
+ };
+
+ sdk_universal-linux-android = android-nixpkgs.sdk."x86_64-linux" (sdkPkgs: with sdkPkgs; [
+ cmdline-tools-latest
+ build-tools-33-0-2
+ platform-tools
+ platforms-android-33
+ ndk-25-2-9519653
+ ]);
+
+ sdk_wasm32-wasi = fetchVendor {
+ name = "sdk_wasm32-wasi";
+ url = "https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-20/wasi-sysroot-20.0.tar.gz";
+ sha256 = "aePDwDYWopPPDSO802BO3YWM4d/J4a4CmGP/hDPF8FY=";
+ };
+
+ sdk_x86_64-pc-windows-msvc = fetchVendor {
+ name = "sdk_x86_64-pc-windows-msvc";
+ url = ""; # User needs to supply.
+ sha256 = "pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo="; # User needs to supply.
+ };
+
+ sdk_x86_64-unknown-linux-gnu = fetchVendor {
+ name = "sdk_x86_64-unknown-linux-gnu";
+ url = "https://commondatastorage.googleapis.com/chrome-linux-sysroot/toolchain/f5f68713249b52b35db9e08f67184cac392369ab/debian_bullseye_amd64_sysroot.tar.xz";
+ sha256 = "+pqXDAsKY1BCBGFD3PDqMv1YiU+0/B2LXXryTFIUaWk=";
+ };
+
+ sdk_x86_64-unknown-nixos-gnu = pkgs.symlinkJoin {
+ name = "sdk_x86_64-unknown-nixos-gnu";
+ paths = [
+ llvm.libcxx.out
+ llvm.libcxx.dev
+ llvm.libcxxabi.out
+ llvm.libunwind.out
+ pkgs.gcc13.cc.libgcc.out
+ pkgs.gcc13.cc.libgcc.libgcc
+ pkgs.glibc.dev
+ pkgs.glibc.libgcc.out
+ pkgs.glibc.out
+ ];
+ };
+ in
+ {
+ packages."x86_64-linux".bazel = {
+ config = pkgs.writeTextFile {
+ name = "bazel-config";
+ destination = "/config.bzl";
+ text = ''
+ LLVM = "${llvm.bintools-unwrapped}"
+ CLANG = "${llvm.clang-unwrapped}"
+ CLANG_LIB = "${llvm.clang-unwrapped.lib}"
+ CLANG_LIB_VERSION = "16"
+
+ NIXOS_DYNAMIC_LINKER = "${pkgs.glibc.out}/lib64/ld-linux-x86-64.so.2"
+ LIBCLANG_RT_WASM32 = "${libclang_rt_wasm32}"
+ ANDROID_NDK_VERSION = "25.2.9519653"
+
+ SDK_AARCH64_UNKNOWN_LINUX_GNU = "${sdk_aarch64-unknown-linux-gnu}"
+ SDK_UNIVERSAL_APPLE_DARWIN = "${sdk_universal-apple-darwin}"
+ SDK_UNIVERSAL_APPLE_IOS = "${sdk_universal-apple-ios}"
+ SDK_UNIVERSAL_LINUX_ANDROID = "${sdk_universal-linux-android}"
+ SDK_WASM32_WASI = "${sdk_wasm32-wasi}"
+ SDK_X86_64_PC_WINDOWS_MSVC = "${sdk_x86_64-pc-windows-msvc}"
+ SDK_X86_64_UNKNOWN_LINUX_GNU = "${sdk_x86_64-unknown-linux-gnu}"
+ SDK_X86_64_UNKNOWN_NIXOS_GNU = "${sdk_x86_64-unknown-nixos-gnu}"
+ '';
+ };
+
+ rust = rust;
+
+ cargo-bazel = rules_rust.packages."x86_64-linux".cargo-bazel;
+ };
+
+ devShells."x86_64-linux".default = pkgs.mkShellNoCC
+ {
+ packages = [
+ llvm.bintools-unwrapped
+ llvm.clang-unwrapped
+ rust
+
+ pkgs.bazel-buildtools
+ pkgs.bazel_6
+ pkgs.cacert
+ pkgs.nix
+ ];
+ };
+ };
+}
diff --git a/examples/nix_cross_compiling/rust_binary/BUILD b/examples/nix_cross_compiling/rust_binary/BUILD
new file mode 100644
index 0000000000..71368e7b1e
--- /dev/null
+++ b/examples/nix_cross_compiling/rust_binary/BUILD
@@ -0,0 +1,28 @@
+load("@rules_rust//rust:defs.bzl", "rust_binary")
+
+package(default_visibility = ["//visibility:public"])
+
+rust_binary(
+ name = "rust_binary",
+ srcs = select({
+ # See comments in `rust_binary_wasm32-unknown-unknown.rs`.
+ "@platforms//os:none": ["rust_binary_wasm32-unknown-unknown.rs"],
+ # See comments in `rust_binary_wasm32-wasi.rs`.
+ "@platforms//os:wasi": ["rust_binary_wasm32-wasi.rs"],
+ "//conditions:default": ["rust_binary.rs"],
+ }),
+ tags = ["platform_missing"],
+ deps = [
+ "//cc_library",
+ "//rust_library",
+ "@crate_index//:anyhow",
+ ] + select({
+ "@platforms//os:none": [],
+ # To be removed once the `wasm32-wasi` version of `tokio` can `select()`
+ # over different features.
+ "@platforms//os:wasi": [],
+ "//conditions:default": [
+ "@crate_index//:tokio",
+ ],
+ }),
+)
diff --git a/examples/nix_cross_compiling/rust_binary/rust_binary.rs b/examples/nix_cross_compiling/rust_binary/rust_binary.rs
new file mode 100644
index 0000000000..47cd9e0efb
--- /dev/null
+++ b/examples/nix_cross_compiling/rust_binary/rust_binary.rs
@@ -0,0 +1,14 @@
+use anyhow::Result;
+
+use rust_library::rust_double_value;
+
+extern "C" { fn cc_double_value(value: i32) -> i32; }
+
+#[tokio::main]
+async fn main() -> Result<()> {
+ println!("Hello World!");
+ println!("CC: {}", unsafe{ cc_double_value(5) });
+ println!("Rust: {}", rust_double_value(5));
+
+ Ok(())
+}
diff --git a/examples/nix_cross_compiling/rust_binary/rust_binary_wasm32-unknown-unknown.rs b/examples/nix_cross_compiling/rust_binary/rust_binary_wasm32-unknown-unknown.rs
new file mode 100644
index 0000000000..b242ef0bcb
--- /dev/null
+++ b/examples/nix_cross_compiling/rust_binary/rust_binary_wasm32-unknown-unknown.rs
@@ -0,0 +1,17 @@
+use anyhow::Result;
+
+use rust_library::rust_double_value;
+
+extern "C" {
+ fn cc_double_value(value: i32) -> i32;
+}
+
+// `wasm32-unknown-unknown` is very barebones, so we don't have access to
+// printing or `tokio`, so we can't output anything or use `async main`,
+// but we can still call the functions.
+fn main() -> Result<()> {
+ unsafe { cc_double_value(5) };
+ rust_double_value(5);
+
+ Ok(())
+}
diff --git a/examples/nix_cross_compiling/rust_binary/rust_binary_wasm32-wasi.rs b/examples/nix_cross_compiling/rust_binary/rust_binary_wasm32-wasi.rs
new file mode 100644
index 0000000000..8a51ea20e3
--- /dev/null
+++ b/examples/nix_cross_compiling/rust_binary/rust_binary_wasm32-wasi.rs
@@ -0,0 +1,22 @@
+use anyhow::Result;
+
+use rust_library::rust_double_value;
+
+extern "C" {
+ fn cc_double_value(value: i32) -> i32;
+}
+
+// `tokio` currently blocked on needing the `wasm32-wasi` version of `tokio`
+// to `select()` over different features.
+
+// `wasm32-wasi` has limited support for `tokio` presently, so we can use the
+// example but only with the single threaded executor.
+// #[tokio::main(flavor = "current_thread")]
+// async fn main() -> Result<()> {
+fn main() -> Result<()> {
+ println!("Hello World!");
+ println!("CC: {}", unsafe { cc_double_value(5) });
+ println!("Rust: {}", rust_double_value(5));
+
+ Ok(())
+}
diff --git a/examples/nix_cross_compiling/rust_library/BUILD b/examples/nix_cross_compiling/rust_library/BUILD
new file mode 100644
index 0000000000..f7dee8cb8e
--- /dev/null
+++ b/examples/nix_cross_compiling/rust_library/BUILD
@@ -0,0 +1,19 @@
+load("@rules_rust//rust:defs.bzl", "rust_library", "rust_static_library")
+
+package(default_visibility = ["//visibility:public"])
+
+rust_library(
+ name = "rust_library",
+ srcs = ["rust_library.rs"],
+ tags = ["platform_missing"],
+ deps = [],
+)
+
+# CC needs to link against a Rust `staticlib` crate which includes
+# all the Rust `std` symbols.
+rust_static_library(
+ name = "rust_library_cc",
+ srcs = ["rust_library.rs"],
+ tags = ["platform_missing"],
+ deps = [],
+)
diff --git a/examples/nix_cross_compiling/rust_library/rust_library.rs b/examples/nix_cross_compiling/rust_library/rust_library.rs
new file mode 100644
index 0000000000..f7b84d98ba
--- /dev/null
+++ b/examples/nix_cross_compiling/rust_library/rust_library.rs
@@ -0,0 +1,4 @@
+#[no_mangle]
+pub fn rust_double_value(value: i32) -> i32 {
+ value * 2
+}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000000..7acf2fed8b
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,100 @@
+{
+ "nodes": {
+ "fenix": {
+ "inputs": {
+ "nixpkgs": [
+ "nixpkgs"
+ ],
+ "rust-analyzer-src": "rust-analyzer-src"
+ },
+ "locked": {
+ "lastModified": 1699856538,
+ "narHash": "sha256-Fr3ehKE3ruGUKDzq/rb48N7oLarA3a5nROMjP8O13/o=",
+ "owner": "nix-community",
+ "repo": "fenix",
+ "rev": "6807e7b6e855a095a3d0cb35e6cfa6935f384085",
+ "type": "github"
+ },
+ "original": {
+ "owner": "nix-community",
+ "repo": "fenix",
+ "type": "github"
+ }
+ },
+ "flake-utils": {
+ "inputs": {
+ "systems": "systems"
+ },
+ "locked": {
+ "lastModified": 1694529238,
+ "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+ "owner": "numtide",
+ "repo": "flake-utils",
+ "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+ "type": "github"
+ },
+ "original": {
+ "owner": "numtide",
+ "repo": "flake-utils",
+ "type": "github"
+ }
+ },
+ "nixpkgs": {
+ "locked": {
+ "lastModified": 1699725108,
+ "narHash": "sha256-NTiPW4jRC+9puakU4Vi8WpFEirhp92kTOSThuZke+FA=",
+ "owner": "NixOS",
+ "repo": "nixpkgs",
+ "rev": "911ad1e67f458b6bcf0278fa85e33bb9924fed7e",
+ "type": "github"
+ },
+ "original": {
+ "owner": "NixOS",
+ "ref": "nixpkgs-unstable",
+ "repo": "nixpkgs",
+ "type": "github"
+ }
+ },
+ "root": {
+ "inputs": {
+ "fenix": "fenix",
+ "flake-utils": "flake-utils",
+ "nixpkgs": "nixpkgs"
+ }
+ },
+ "rust-analyzer-src": {
+ "flake": false,
+ "locked": {
+ "lastModified": 1699808862,
+ "narHash": "sha256-gjMqmlCvLVlptL35HHvALrOKrFyxjg5hryXbbpVyoeY=",
+ "owner": "rust-lang",
+ "repo": "rust-analyzer",
+ "rev": "416e9c856a792ce2214c449677ca0a1f38965248",
+ "type": "github"
+ },
+ "original": {
+ "owner": "rust-lang",
+ "ref": "nightly",
+ "repo": "rust-analyzer",
+ "type": "github"
+ }
+ },
+ "systems": {
+ "locked": {
+ "lastModified": 1681028828,
+ "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+ "owner": "nix-systems",
+ "repo": "default",
+ "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+ "type": "github"
+ },
+ "original": {
+ "owner": "nix-systems",
+ "repo": "default",
+ "type": "github"
+ }
+ }
+ },
+ "root": "root",
+ "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000000..78080fa3d8
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,48 @@
+{
+ inputs = {
+ nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+ flake-utils.url = "github:numtide/flake-utils";
+
+ fenix = {
+ url = "github:nix-community/fenix";
+ inputs.nixpkgs.follows = "nixpkgs";
+ };
+ };
+
+ outputs = { self, nixpkgs, flake-utils, fenix, ... }:
+ flake-utils.lib.eachDefaultSystem (system:
+ let
+ pkgs = import nixpkgs { inherit system; };
+
+ rust = fenix.packages.${system}.default.toolchain;
+ in
+ {
+ packages.cargo-bazel = (pkgs.makeRustPlatform {
+ cargo = rust;
+ rustc = rust;
+ }).buildRustPackage {
+ pname = "cargo-bazel";
+ version = "0.8.0";
+
+ src = ./crate_universe;
+ cargoLock.lockFile = ./crate_universe/Cargo.lock;
+
+ # Tests cannot be run via Cargo due to the dependency on the
+ # Bazel `runfiles` crate.
+ doCheck = false;
+ };
+
+ devShells.default = pkgs.mkShellNoCC
+ {
+ packages = [
+ rust
+
+ pkgs.bazel-buildtools
+ pkgs.bazel_6
+ pkgs.cacert
+ pkgs.nix
+ ];
+ };
+ });
+}