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{ lib, stdenv, llvm_meta, cmake, ninja, python3
, monorepoSrc, runCommand, fetchpatch
, cxx-headers, libunwind, version
, enableShared ? !stdenv.hostPlatform.isStatic
}:
stdenv.mkDerivation rec {
pname = "libcxxabi";
inherit version;
src = runCommand "${pname}-src-${version}" {} ''
mkdir -p "$out"
cp -r ${monorepoSrc}/cmake "$out"
cp -r ${monorepoSrc}/${pname} "$out"
mkdir -p "$out/libcxx/src"
cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
cp -r ${monorepoSrc}/libcxx/include "$out/libcxx"
cp -r ${monorepoSrc}/libcxx/src/include "$out/libcxx/src"
mkdir -p "$out/llvm"
cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
cp -r ${monorepoSrc}/llvm/utils "$out/llvm"
cp -r ${monorepoSrc}/runtimes "$out"
'';
sourceRoot = "${src.name}/runtimes";
outputs = [ "out" "dev" ];
postUnpack = lib.optionalString stdenv.isDarwin ''
export TRIPLE=x86_64-apple-darwin
'';
prePatch = ''
cd ../${pname}
chmod -R u+w .
'';
patches = [
./gnu-install-dirs.patch
# https://reviews.llvm.org/D132298, Allow building libcxxabi alone
(fetchpatch {
url = "https://github.com/llvm/llvm-project/commit/e6a0800532bb409f6d1c62f3698bdd6994a877dc.patch";
sha256 = "1xyjd56m4pfwq8p3xh6i8lhkk9kq15jaml7qbhxdf87z4jjkk63a";
stripLen = 1;
})
];
postPatch = ''
cd ../runtimes
'';
nativeBuildInputs = [ cmake ninja python3 ];
buildInputs = lib.optional (!stdenv.isDarwin && !stdenv.hostPlatform.isWasm) libunwind;
cmakeFlags = [
"-DLLVM_ENABLE_RUNTIMES=libcxxabi"
"-DLIBCXXABI_LIBCXX_INCLUDES=${cxx-headers}/include/c++/v1"
# `libcxxabi`'s build does not need a toolchain with a c++ stdlib attached
# (we specify the headers it should use explicitly above).
#
# CMake however checks for this anyways; this flag tells it not to. See:
# https://github.com/llvm/llvm-project/blob/4bd3f3759259548e159aeba5c76efb9a0864e6fa/llvm/runtimes/CMakeLists.txt#L243
"-DCMAKE_CXX_COMPILER_WORKS=ON"
] ++ lib.optionals (stdenv.hostPlatform.useLLVM or false && !stdenv.hostPlatform.isWasm) [
"-DLLVM_ENABLE_LIBCXX=ON"
"-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
# libcxxabi's CMake looks as though it treats -nostdlib++ as implying -nostdlib,
# but that does not appear to be the case for example when building
# pkgsLLVM.libcxxabi (which uses clangNoCompilerRtWithLibc).
"-DCMAKE_EXE_LINKER_FLAGS=-nostdlib"
"-DCMAKE_SHARED_LINKER_FLAGS=-nostdlib"
] ++ lib.optionals stdenv.hostPlatform.isWasm [
"-DCMAKE_C_COMPILER_WORKS=ON"
"-DCMAKE_CXX_COMPILER_WORKS=ON"
"-DLIBCXXABI_ENABLE_THREADS=OFF"
"-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF"
"-DUNIX=ON" # Required otherwise libc++ fails to detect the correct linker
] ++ lib.optionals (!enableShared) [
"-DLIBCXXABI_ENABLE_SHARED=OFF"
];
preInstall = lib.optionalString stdenv.isDarwin ''
for file in lib/*.dylib; do
# this should be done in CMake, but having trouble figuring out
# the magic combination of necessary CMake variables
# if you fancy a try, take a look at
# https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
install_name_tool -id $out/$file $file
done
'';
postInstall = ''
mkdir -p "$dev/include"
install -m 644 ../../${pname}/include/${if stdenv.isDarwin then "*" else "cxxabi.h"} "$dev/include"
'';
passthru = {
libName = "c++abi";
};
meta = llvm_meta // {
homepage = "https://libcxxabi.llvm.org/";
description = "Provides C++ standard library support";
longDescription = ''
libc++abi is a new implementation of low level support for a standard C++ library.
'';
# "All of the code in libc++abi is dual licensed under the MIT license and
# the UIUC License (a BSD-like license)":
license = with lib.licenses; [ mit ncsa ];
maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
};
}
|