pkgs/development/compilers/llvm/6/compiler-rt.nix


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

{ stdenv, version, fetch, cmake, python, llvm }:
with stdenv.lib;
stdenv.mkDerivation rec {
  name = "compiler-rt-${version}";
  inherit version;
  src = fetch "compiler-rt" "16m7rvh3w6vq10iwkjrr1nn293djld3xm62l5zasisaprx117k6h";

  nativeBuildInputs = [ cmake python llvm ];

  configureFlags = [
    "-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
  ];

  outputs = [ "dev" "out" ];

  patches = [
    ./compiler-rt-codesign.patch # Revert compiler-rt commit that makes codesign mandatory
  ] ++ optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch;

  # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
  # to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
  # can build this. If we didn't do it, basically the entire nixpkgs on Darwin would have an unfree dependency and we'd
  # get no binary cache for the entire platform. If you really find yourself wanting the TSAN, make this controllable by
  # a flag and turn the flag off during the stdenv build.
  postPatch = stdenv.lib.optionalString stdenv.isDarwin ''
    substituteInPlace cmake/config-ix.cmake \
      --replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
  '';

  enableParallelBuilding = true;
}