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1{
2 lib,
3 stdenv,
4 llvm_meta,
5 src ? null,
6 monorepoSrc ? null,
7 version,
8 release_version,
9 runCommand,
10 python3,
11 python3Packages,
12 patches ? [ ],
13 cmake,
14 ninja,
15 isFullBuild ? true,
16 linuxHeaders,
17}:
18let
19 pname = "libc";
20
21 src' = runCommand "${pname}-src-${version}" { } (''
22 mkdir -p "$out"
23 cp -r ${monorepoSrc}/cmake "$out"
24 cp -r ${monorepoSrc}/runtimes "$out"
25 cp -r ${monorepoSrc}/llvm "$out"
26 cp -r ${monorepoSrc}/compiler-rt "$out"
27 cp -r ${monorepoSrc}/${pname} "$out"
28 '');
29in
30stdenv.mkDerivation (finalAttrs: {
31 inherit pname version patches;
32
33 src = src';
34
35 sourceRoot = "${finalAttrs.src.name}/runtimes";
36
37 nativeBuildInputs =
38 [
39 cmake
40 python3
41 ]
42 ++ (lib.optional (lib.versionAtLeast release_version "15") ninja)
43 ++ (lib.optional isFullBuild python3Packages.pyyaml);
44
45 buildInputs = lib.optional isFullBuild linuxHeaders;
46
47 outputs = [ "out" ] ++ (lib.optional isFullBuild "dev");
48
49 postUnpack = lib.optionalString isFullBuild ''
50 chmod +w $sourceRoot/../$pname/utils/hdrgen
51 patchShebangs $sourceRoot/../$pname/utils/hdrgen/main.py
52 chmod +x $sourceRoot/../$pname/utils/hdrgen/main.py
53 '';
54
55 prePatch = ''
56 cd ../${finalAttrs.pname}
57 chmod -R u+w ../
58 '';
59
60 postPatch = ''
61 cd ../runtimes
62 '';
63
64 postInstall =
65 lib.optionalString (!isFullBuild) ''
66 substituteAll ${./libc-shim.tpl} $out/lib/libc.so
67 ''
68 # LLVM libc doesn't recognize static vs dynamic yet.
69 # Treat LLVM libc as a static libc, requires this symlink until upstream fixes it.
70 + lib.optionalString (isFullBuild && stdenv.hostPlatform.isLinux) ''
71 ln $out/lib/crt1.o $out/lib/Scrt1.o
72 '';
73
74 libc = if (!isFullBuild) then stdenv.cc.libc else null;
75
76 cmakeFlags =
77 [
78 (lib.cmakeBool "LLVM_LIBC_FULL_BUILD" isFullBuild)
79 (lib.cmakeFeature "LLVM_ENABLE_RUNTIMES" "libc;compiler-rt")
80 # Tests requires the host to have a libc.
81 (lib.cmakeBool "LLVM_INCLUDE_TESTS" (stdenv.cc.libc != null))
82 (lib.cmakeBool "LLVM_LIBC_INCLUDE_SCUDO" true)
83 (lib.cmakeBool "COMPILER_RT_BUILD_SCUDO_STANDALONE_WITH_LLVM_LIBC" true)
84 (lib.cmakeBool "COMPILER_RT_BUILD_GWP_ASAN" false)
85 (lib.cmakeBool "COMPILER_RT_SCUDO_STANDALONE_BUILD_SHARED" false)
86 ]
87 ++ lib.optional (isFullBuild && stdenv.cc.libc == null) [
88 # CMake runs a check to see if the compiler works.
89 # This includes including headers which requires a libc.
90 # Skip these checks because a libc cannot be used when one doesn't exist.
91 (lib.cmakeBool "CMAKE_C_COMPILER_WORKS" true)
92 (lib.cmakeBool "CMAKE_CXX_COMPILER_WORKS" true)
93 ];
94
95 # For the update script:
96 passthru = {
97 monorepoSrc = monorepoSrc;
98 inherit isFullBuild;
99 };
100
101 meta = llvm_meta // {
102 broken = stdenv.hostPlatform.isDarwin;
103 homepage = "https://libc.llvm.org/";
104 description = "Standard C library for LLVM";
105 };
106})