feat: gcc toolchain (#1)

* feat: gcc toolchain

Signed-off-by: Thulio Ferraz Assis <[email protected]>

* fix: generated header

* fix: set -lstdc++ by default

Many libraries under Bazel rely on this behaviour by default.

Signed-off-by: Thulio Ferraz Assis <[email protected]>

* fix: set -I and -isystem flags

Signed-off-by: Thulio Ferraz Assis <[email protected]>

* feat: switch to use bootlin pre-compiled tools

Signed-off-by: Thulio Ferraz Assis <[email protected]>

* feat: explicit search dirs

Signed-off-by: Thulio Ferraz Assis <[email protected]>

* refactor: reduce hops and expose more attrs

Signed-off-by: Thulio Ferraz Assis <[email protected]>

* fix: use header substitution

Signed-off-by: Thulio Ferraz Assis <[email protected]>

.bazelrc

@@ -0,0 +1,6 @@
+build --extra_toolchains=@gcc_toolchain//:toolchain --incompatible_enable_cc_toolchain_resolution
+
+test --sandbox_default_allow_network=false
+test --test_output=errors
+
+build:debug --verbose_failures --sandbox_debug --toolchain_resolution_debug

.gitignore

@@ -0,0 +1 @@
+bazel-*

WORKSPACE

@@ -0,0 +1,32 @@
+workspace(name = "bazel_gcc_toolchain")
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "bazel_skylib",
+    urls = [
+        "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.2.1/bazel-skylib-1.2.1.tar.gz",
+        "https://github.com/bazelbuild/bazel-skylib/releases/download/1.2.1/bazel-skylib-1.2.1.tar.gz",
+    ],
+    sha256 = "f7be3474d42aae265405a592bb7da8e171919d74c16f082a5457840f06054728",
+)
+
+load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")
+
+bazel_skylib_workspace()
+
+http_archive(
+    name = "rules_cc",
+    urls = ["https://github.com/bazelbuild/rules_cc/releases/download/0.0.1/rules_cc-0.0.1.tar.gz"],
+    sha256 = "4dccbfd22c0def164c8f47458bd50e0c7148f3d92002cdb459c2a96a68498241",
+)
+
+load("//toolchain:defs.bzl", "gcc_register_toolchain")
+
+gcc_register_toolchain(
+    name = "gcc_toolchain",
+    url = "https://toolchains.bootlin.com/downloads/releases/toolchains/x86-64/tarballs/x86-64--glibc--stable-2021.11-5.tar.bz2",
+    sha256 = "6fe812add925493ea0841365f1fb7ca17fd9224bab61a731063f7f12f3a621b0",
+    strip_prefix = "x86-64--glibc--stable-2021.11-5",
+    target_arch = "x86_64",
+)

examples/hello_world_c/BUILD.bazel

@@ -0,0 +1,4 @@
+cc_binary(
+    name = "hello_world_c",
+    srcs = ["main.c"],
+)

examples/hello_world_c/main.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main()
+{
+    printf("Hello World!\n");
+    return 0;
+}

examples/hello_world_cpp/BUILD.bazel

@@ -0,0 +1,5 @@
+cc_binary(
+    name = "hello_world_cpp",
+    srcs = ["main.cpp"],
+    linkopts = ["-lstdc++"],
+)

examples/hello_world_cpp/main.cpp

@@ -0,0 +1,7 @@
+#include <iostream>
+
+int main()
+{
+    std::cout << "Hello World!" << std::endl;
+    return 0;
+}