nixpkgs/pkgs/development/compilers/llvm/9/libc++/default.nix
Andrew Childs 7869d16545 llvmPackages: Multuple outputs for everythting
Also begin to start work on cross compilation, though that will have to
be finished later.

The patches are based on the first version of
https://reviews.llvm.org/D99484. It's very annoying to do the
back-porting but the review has uncovered nothing super major so I'm
fine sticking with what I've got.

Beyond making the outputs work, I also strove to re-sync the packages,
as they have been drifting pointlessly apart for some time.

----

Other misc notes, highly incomplete

- lvm-config-native and llvm-config are put in `dev` because they are
  tools just for build time.

- Clang no longer has an lld dep. That was introduced in
  db29857eb3, but if clang needs help
  finding lld when it is used we should just pass it flags / put in the
  resource dir. Providing it at build time increases critical path
  length for no good reason.

----

A note on `nativeCC`:

`stdenv` takes tools from the previous stage, so:

1. `pkgsBuildBuild`: `(?1, x, x)`
2. `pkgsBuildBuild.stdenv.cc`: `(?0, ?1, x)`

while:

1. `pkgsBuildBuild`: `(?1, x, x)`
2. `pkgsBuildBuild.targetPackages`: `(x, x, ?2)`
3. `pkgsBuildBuild.targetPackages.stdenv.cc`: `(?1, x, x)`
2021-04-30 05:41:00 +00:00

57 lines
1.9 KiB
Nix

{ lib, stdenv, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
, enableShared ? !stdenv.hostPlatform.isStatic
}:
stdenv.mkDerivation {
pname = "libc++";
inherit version;
src = fetch "libcxx" "0d2bj5i6mk4caq7skd5nsdmz8c2m5w5anximl5wz3x32p08zz089";
postUnpack = ''
unpackFile ${libcxxabi.src}
export LIBCXXABI_INCLUDE_DIR="$PWD/$(ls -d libcxxabi-${version}*)/include"
'';
outputs = [ "out" "dev" ];
patches = [
./gnu-install-dirs.patch
] ++ lib.optional stdenv.hostPlatform.isMusl ../../libcxx-0001-musl-hacks.patch;
preConfigure = ''
# Get headers from the cxxabi source so we can see private headers not installed by the cxxabi package
cmakeFlagsArray=($cmakeFlagsArray -DLIBCXX_CXX_ABI_INCLUDE_PATHS="$LIBCXXABI_INCLUDE_DIR")
'' + lib.optionalString stdenv.hostPlatform.isMusl ''
patchShebangs utils/cat_files.py
'';
nativeBuildInputs = [ cmake ]
++ lib.optional (stdenv.hostPlatform.isMusl || stdenv.hostPlatform.isWasi) python3
++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
buildInputs = [ libcxxabi ];
cmakeFlags = [
"-DLIBCXX_LIBCXXABI_LIB_PATH=${libcxxabi}/lib"
"-DLIBCXX_LIBCPPABI_VERSION=2"
"-DLIBCXX_CXX_ABI=libcxxabi"
] ++ lib.optional (stdenv.hostPlatform.isMusl || stdenv.hostPlatform.isWasi) "-DLIBCXX_HAS_MUSL_LIBC=1"
++ lib.optional (stdenv.hostPlatform.useLLVM or false) "-DLIBCXX_USE_COMPILER_RT=ON"
++ lib.optional stdenv.hostPlatform.isWasm [
"-DLIBCXX_ENABLE_THREADS=OFF"
"-DLIBCXX_ENABLE_FILESYSTEM=OFF"
"-DLIBCXX_ENABLE_EXCEPTIONS=OFF"
] ++ lib.optional (!enableShared) "-DLIBCXX_ENABLE_SHARED=OFF";
passthru = {
isLLVM = true;
};
meta = {
homepage = "https://libcxx.llvm.org/";
description = "A new implementation of the C++ standard library, targeting C++11";
license = with lib.licenses; [ ncsa mit ];
platforms = lib.platforms.all;
};
}