runtime/compiler-rt.nix

Build compiler-rt for CRT files and builtins

This builds LLVM's compiler-rt to produce:

- crtbegin.o / crtend.o (C runtime begin/end)
- libyolort.a (builtins library, renamed from libclang_rt.builtins)

These are used by the yolo runtime and replace GCC's crt files.

λpkgs, sources?

pkgs
sources	default import../lib/sources.nix inherit pkgs;

let

14lib=

import../lib inherit pkgs;

used by cmakeFlags compiler-rt

15inherit lib

setupCcache

CMake flags following upstream build_compiler_rt.sh

18cmakeFlags=

"-G Ninja" "-DCMAKE_BUILD_TYPE=Release" "-DCOMPILER_RT_BUILD_BUILTINS=ON" "-DCOMPILER_RT_BUILD_CRT=ON" "-DCOMPILER_RT_CRT_USE_EH_FRAME_REGISTRY=ON" "-DCOMPILER_RT_BUILD_SANITIZERS=OFF" "-DCOMPILER_RT_BUILD_XRAY=OFF" "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF" "-DCOMPILER_RT_BUILD_PROFILE=OFF" "-DCOMPILER_RT_DEFAULT_TARGET_TRIPLE=${lib.filcArch}-linux-gnu"

uses lib used by compiler-rt

33compiler-rt=

pkgs.stdenv.mkDerivation

34pname=

"filc-compiler-rt"

35version=

"git"

36src=

sources.compiler-rt-src

38nativeBuildInputs=

with pkgs; cmake ninja python3 ccache

45preConfigure=

${setupCcache}

cd compiler-rt

mkdir -p build

51configurePhase=

runHook preConfigure

cd build

cmake ${pkgs.lib.concatStringsSep" " cmakeFlags} ..

runHook postConfigure

58buildPhase=

runHook preBuild

ninja -j$NIX_BUILD_CORES

runHook postBuild

64installPhase=

runHook preInstall

mkdir -p $out/lib

# Copy and rename outputs following upstream's naming convention

cp lib/linux/clang_rt.crtbegin-${lib.filcArch}.o $out/lib/crtbegin.o

cp lib/linux/clang_rt.crtend-${lib.filcArch}.o $out/lib/crtend.o

cp lib/linux/libclang_rt.builtins-${lib.filcArch}.a $out/lib/libyolort.a

runHook postInstall

76enableParallelBuilding=

true

77meta.description=

"Fil-C compiler-rt (CRT files and builtins)"

uses cmakeFlags lib setupCcache