Peter Waller
6ba1b5b0b3
What changed:
* Fixed crtbeginS.o and crtendS.o missing
(they may or may not be called crt{begin_end},{,_shared}.
* Fixed implicit function declaration causing build errors for various
builds by supplying -Wno-implicit-function-declaration.
* Fixed __cxxabi_config.h missing, by adding -I${cxxabi}/include/c++/v1
in the wrapper.
* Fixed libcxx failing to build due to missing libunwind symbols by
including libunwind as a buildInput, and setting
-DLIBCXX_ADDITIONAL_LIBRARIES=unwind for stdenv.hostPlatform.useLLVM == true.
* libcxxabi wants to find libunwind at libunwind_shared.so, so symlink
it there in libunwind.
* llvmPackages_16.libcxxabi: Pass -nostdlib via CMAKE_*_LINKER_FLAGS
Without this flag, the link of libcxxabi.so tries to pull in libgcc and
friends, from the clang compiler driver.
* Drop unneeded musl hack patch from libcxx.
* Pass -Wno-error=implicit-function-declaration only to compiler-rt
See LLVM forum discussion:
https://discourse.llvm.org/t/configure-script-breakage-with-the-new-werror-implicit-function-declaration/65213
In summary, LLVM 16 made implicit function declaration an error. This
happens a lot in configure scripts which can break things.
* llvmPackages_16: !isDarwin: Supply -DLIBCXX_ABI_USE_LLVM_UNWINDER=On
Otherwise it fails with various undefined references to _Unwind_*
functions: (full list: _Unwind_DeleteException _Unwind_GetIP
_Unwind_GetLanguageSpecificData _Unwind_GetRegionStart
_Unwind_RaiseException _Unwind_Resume _Unwind_SetGR _Unwind_SetIP).
* 16.libcxxabi: Only pass -nostdlib for useLLVM and Darwin builds
What was tested:
* x86_64-linux, aarch64-linux, the stdenv builds.
* Additionally I was able to get nix to build, with an overlay to fix
a couple of minor issues in downstream packages (overlay supplied in
PR #246577.
* aarch64-darwin fails spuriously in a single LLVM test
strip-preserve-atime.test checking atime timestamps.
* The same for pkgsLLVM with llvmPackages = llvmPackages_15.
Signed-off-by: Peter Waller <p@pwaller.net>
68 lines
1.9 KiB
Nix
68 lines
1.9 KiB
Nix
{ lib, stdenv, llvm_meta, version
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, monorepoSrc, runCommand
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, cmake
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, ninja
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, python3
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, enableShared ? !stdenv.hostPlatform.isStatic
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}:
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stdenv.mkDerivation rec {
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pname = "libunwind";
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inherit version;
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# I am not so comfortable giving libc++ and friends the whole monorepo as
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# requested, so I filter it to what is needed.
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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"
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cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
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cp -r ${monorepoSrc}/libcxx/utils "$out/libcxx"
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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 = "${src.name}/runtimes";
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prePatch = ''
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cd ../${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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];
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postPatch = ''
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cd ../runtimes
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'';
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postInstall = lib.optionalString (enableShared && !stdenv.hostPlatform.isDarwin) ''
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# libcxxabi wants to link to libunwind_shared.so (?).
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ln -s $out/lib/libunwind.so $out/lib/libunwind_shared.so
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'';
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outputs = [ "out" "dev" ];
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nativeBuildInputs = [ cmake ninja python3 ];
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cmakeFlags = [
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"-DLLVM_ENABLE_RUNTIMES=libunwind"
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] ++ lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
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meta = llvm_meta // {
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# Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
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homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
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description = "LLVM's unwinder library";
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longDescription = ''
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The unwind library provides a family of _Unwind_* functions implementing
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the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
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I). It is a dependency of the C++ ABI library, and sometimes is a
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dependency of other runtimes.
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'';
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};
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}
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