set fixed compiler builtins version

src/.gitignore

@@ -0,0 +1 @@
+libc

src/bootstrap/bootstrap.py

@@ -447,8 +447,6 @@ def fix_executable(fname):
 
         if not os.path.exists("/etc/NIXOS"):
             return
-        if os.path.exists("/lib"):
-            return
 
         # At this point we're pretty sure the user is running NixOS
         nix_os_msg = "info: you seem to be running NixOS. Attempting to patch"

src/liballoc/Cargo.toml

@@ -12,7 +12,7 @@ path = "lib.rs"
 
 [dependencies]
 core = { path = "../libcore" }
-compiler_builtins = { version = "0.1.10", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "=0.1.27", features = ['rustc-dep-of-std'] }
 
 [dev-dependencies]
 rand = "0.7"

src/libpanic_abort/Cargo.toml

@@ -13,4 +13,4 @@ doc = false
 [dependencies]
 core = { path = "../libcore" }
 libc = { version = "0.2", default-features = false }
-compiler_builtins = "0.1.0"
+compiler_builtins = "=0.1.27"

src/libpanic_unwind/Cargo.toml

@@ -15,5 +15,5 @@ alloc = { path = "../liballoc" }
 core = { path = "../libcore" }
 libc = { version = "0.2", default-features = false }
 unwind = { path = "../libunwind" }
-compiler_builtins = "0.1.0"
+compiler_builtins = "=0.1.27"
 cfg-if = "0.1.8"

src/libprofiler_builtins/Cargo.toml

@@ -14,7 +14,7 @@ doc = false
 
 [dependencies]
 core = { path = "../libcore" }
-compiler_builtins = { version = "0.1.0", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "=0.1.27", features = ['rustc-dep-of-std'] }
 
 [build-dependencies]
 cc = "1.0.1"

src/librustc_session/Cargo.toml

@@ -9,7 +9,7 @@ name = "rustc_session"
 path = "lib.rs"
 
 [dependencies]
-getopts = "0.2"
+getopts = "*"
 log = "0.4"
 rustc_errors = { path = "../librustc_errors" }
 rustc_feature = { path = "../librustc_feature" }

src/librustc_target/spec/aarch64_unknown_horizon_libnx.rs

@@ -0,0 +1,35 @@
+use super::{LinkerFlavor, PanicStrategy, Target, TargetOptions};
+
+pub fn target() -> Result<Target, String> {
+    let opts = TargetOptions {
+        linker: Some("aarch64-none-elf-gcc".to_owned()),
+        features: "+a53,+strict-align,+crc".to_string(),
+        executables: true,
+        relocation_model: "pic".to_string(),
+        disable_redzone: true,
+        linker_is_gnu: true,
+        max_atomic_width: Some(128),
+        panic_strategy: PanicStrategy::Unwind,
+        abi_blacklist: super::arm_base::abi_blacklist(),
+        target_family: Some("unix".to_string()),
+        position_independent_executables: true,
+        has_elf_tls: false,
+        trap_unreachable: true,
+        emit_debug_gdb_scripts: true,
+        requires_uwtable: true,
+        ..Default::default()
+    };
+    Ok(Target {
+        llvm_target: "aarch64-unknown-none".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "64".to_string(),
+        target_c_int_width: "32".to_string(),
+        target_os: "horizon".to_string(),
+        target_env: "newlib".to_string(),
+        target_vendor: "libnx".to_string(),
+        data_layout: "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".to_string(),
+        arch: "aarch64".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: opts,
+    })
+}

src/librustc_target/spec/mod.rs

@@ -512,6 +512,8 @@ supported_targets! {
     ("powerpc-wrs-vxworks", powerpc_wrs_vxworks),
     ("powerpc-wrs-vxworks-spe", powerpc_wrs_vxworks_spe),
     ("powerpc64-wrs-vxworks", powerpc64_wrs_vxworks),
+
+    ("aarch64-unknown-horizon-libnx", aarch64_unknown_horizon_libnx),
 }
 
 /// Everything `rustc` knows about how to compile for a specific target.

src/libstd/Cargo.toml

@@ -19,15 +19,17 @@ cfg-if = { version = "0.1.8", features = ['rustc-dep-of-std'] }
 panic_unwind = { path = "../libpanic_unwind", optional = true }
 panic_abort = { path = "../libpanic_abort" }
 core = { path = "../libcore" }
-libc = { version = "0.2.51", default-features = false, features = ['rustc-dep-of-std'] }
-compiler_builtins = { version = "0.1.16" }
+#libc = { version = "0.2.51", default-features = false, features = ['rustc-dep-of-std'] }
+libc = { git = "https://github.com/leo60228/libc.git", branch = "bindgen-newlib", default-features = false, features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "=0.1.27" }
 profiler_builtins = { path = "../libprofiler_builtins", optional = true }
 unwind = { path = "../libunwind" }
 hashbrown = { version = "0.6.2", default-features = false, features = ['rustc-dep-of-std'] }
 
 [dependencies.backtrace_rs]
 package = "backtrace"
-version = "0.3.46"
+git = "https://github.com/Tarnadas/backtrace-rs.git"
+branch = "horizon"
 default-features = false # without the libstd `backtrace` feature, stub out everything
 features = [ "rustc-dep-of-std" ] # enable build support for integrating into libstd