126 lines
4.5 KiB
Nix
126 lines
4.5 KiB
Nix
{ lib, stdenv, llvm_meta, cmake, ninja, python3
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, monorepoSrc, runCommand, fetchpatch
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, cxx-headers, libunwind, version
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, enableShared ? !stdenv.hostPlatform.isStatic
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}:
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stdenv.mkDerivation rec {
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pname = "libcxxabi";
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inherit version;
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src = runCommand "${pname}-src-${version}" {} ''
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mkdir -p "$out"
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cp -r ${monorepoSrc}/cmake "$out"
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cp -r ${monorepoSrc}/${pname} "$out"
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mkdir -p "$out/libcxx/src"
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cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
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cp -r ${monorepoSrc}/libcxx/include "$out/libcxx"
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cp -r ${monorepoSrc}/libcxx/src/include "$out/libcxx/src"
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mkdir -p "$out/llvm"
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cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
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cp -r ${monorepoSrc}/llvm/utils "$out/llvm"
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cp -r ${monorepoSrc}/runtimes "$out"
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'';
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sourceRoot = "${src.name}/runtimes";
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outputs = [ "out" "dev" ];
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postUnpack = lib.optionalString stdenv.isDarwin ''
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export TRIPLE=x86_64-apple-darwin
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'' + lib.optionalString stdenv.hostPlatform.isWasm ''
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patch -p1 -d llvm -i ${../../common/libcxxabi/wasm.patch}
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'';
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prePatch = ''
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cd ../${pname}
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chmod -R u+w .
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'';
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patches = [
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./gnu-install-dirs.patch
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# https://reviews.llvm.org/D132298, Allow building libcxxabi alone
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(fetchpatch {
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url = "https://github.com/llvm/llvm-project/commit/e6a0800532bb409f6d1c62f3698bdd6994a877dc.patch";
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sha256 = "1xyjd56m4pfwq8p3xh6i8lhkk9kq15jaml7qbhxdf87z4jjkk63a";
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stripLen = 1;
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})
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];
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postPatch = ''
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cd ../runtimes
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'';
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nativeBuildInputs = [ cmake ninja python3 ];
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buildInputs = lib.optional (!stdenv.isDarwin && !stdenv.hostPlatform.isWasm) libunwind;
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cmakeFlags = [
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"-DLLVM_ENABLE_RUNTIMES=libcxxabi"
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"-DLIBCXXABI_LIBCXX_INCLUDES=${cxx-headers}/include/c++/v1"
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# `libcxxabi`'s build does not need a toolchain with a c++ stdlib attached
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# (we specify the headers it should use explicitly above).
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#
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# CMake however checks for this anyways; this flag tells it not to. See:
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# https://github.com/llvm/llvm-project/blob/4bd3f3759259548e159aeba5c76efb9a0864e6fa/llvm/runtimes/CMakeLists.txt#L243
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"-DCMAKE_CXX_COMPILER_WORKS=ON"
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] ++ lib.optionals (stdenv.hostPlatform.useLLVM or false) [
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"-DLLVM_ENABLE_LIBCXX=ON"
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"-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
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# libcxxabi's CMake looks as though it treats -nostdlib++ as implying -nostdlib,
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# but that does not appear to be the case for example when building
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# pkgsLLVM.libcxxabi (which uses clangNoCompilerRtWithLibc).
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"-DCMAKE_EXE_LINKER_FLAGS=-nostdlib"
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"-DCMAKE_SHARED_LINKER_FLAGS=-nostdlib"
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] ++ lib.optionals stdenv.hostPlatform.isWasm [
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"-DLIBCXXABI_ENABLE_THREADS=OFF"
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"-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF"
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] ++ lib.optionals (!enableShared) [
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"-DLIBCXXABI_ENABLE_SHARED=OFF"
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];
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preInstall = lib.optionalString stdenv.isDarwin ''
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for file in lib/*.dylib; do
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if [ -L "$file" ]; then continue; fi
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# Fix up the install name. Preserve the basename, just replace the path.
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installName="$out/lib/$(basename $(${stdenv.cc.targetPrefix}otool -D $file | tail -n 1))"
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# this should be done in CMake, but having trouble figuring out
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# the magic combination of necessary CMake variables
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# if you fancy a try, take a look at
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# https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
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${stdenv.cc.targetPrefix}install_name_tool -id $installName $file
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# cc-wrapper passes '-lc++abi' to all c++ link steps, but that causes
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# libcxxabi to sometimes link against a different version of itself.
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# Here we simply make that second reference point to ourselves.
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for other in $(${stdenv.cc.targetPrefix}otool -L $file | awk '$1 ~ "/libc\\+\\+abi" { print $1 }'); do
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${stdenv.cc.targetPrefix}install_name_tool -change $other $installName $file
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done
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done
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'';
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postInstall = ''
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mkdir -p "$dev/include"
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install -m 644 ../../${pname}/include/${if stdenv.isDarwin then "*" else "cxxabi.h"} "$dev/include"
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'';
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passthru = {
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libName = "c++abi";
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};
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meta = llvm_meta // {
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homepage = "https://libcxxabi.llvm.org/";
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description = "Provides C++ standard library support";
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longDescription = ''
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libc++abi is a new implementation of low level support for a standard C++ library.
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'';
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# "All of the code in libc++abi is dual licensed under the MIT license and
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# the UIUC License (a BSD-like license)":
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license = with lib.licenses; [ mit ncsa ];
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maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
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};
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}
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