nixpkgs/pkgs/development/compilers/llvm/10/libc++/default.nix

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{ lib, stdenv, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
, enableShared ? !stdenv.hostPlatform.isStatic
}:
stdenv.mkDerivation {
pname = "libc++";
inherit version;
src = fetch "libcxx" "0v78bfr6h2zifvdqnj2wlfk4pvxzrqn3hg1v6lqk3y12bx9p9xny";
postUnpack = ''
unpackFile ${libcxxabi.src}
export LIBCXXABI_INCLUDE_DIR="$PWD/$(ls -d libcxxabi-${version}*)/include"
'';
patches = stdenv.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 ]
++ stdenv.lib.optional (stdenv.hostPlatform.isMusl || stdenv.hostPlatform.isWasi) python3
++ stdenv.lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
buildInputs = [ libcxxabi ];
cmakeFlags = [
"-DLIBCXX_LIBCXXABI_LIB_PATH=${libcxxabi}/lib"
"-DLIBCXX_LIBCPPABI_VERSION=2"
"-DLIBCXX_CXX_ABI=libcxxabi"
] ++ stdenv.lib.optional (stdenv.hostPlatform.isMusl || stdenv.hostPlatform.isWasi) "-DLIBCXX_HAS_MUSL_LIBC=1"
++ stdenv.lib.optional (stdenv.hostPlatform.useLLVM or false) "-DLIBCXX_USE_COMPILER_RT=ON"
++ stdenv.lib.optional stdenv.hostPlatform.isWasm [
"-DLIBCXX_ENABLE_THREADS=OFF"
"-DLIBCXX_ENABLE_FILESYSTEM=OFF"
"-DLIBCXX_ENABLE_EXCEPTIONS=OFF"
] ++ stdenv.lib.optional (!enableShared) "-DLIBCXX_ENABLE_SHARED=OFF";
enableParallelBuilding = true;
passthru = {
isLLVM = true;
};
meta = {
homepage = "https://libcxx.llvm.org/";
description = "A new implementation of the C++ standard library, targeting C++11";
license = with stdenv.lib.licenses; [ ncsa mit ];
platforms = stdenv.lib.platforms.all;
};
}