nixpkgs/pkgs/development/compilers/llvm/15/clang/default.nix
Adam Joseph 2e77eb8190 clang_15: fix build!=(host==target) cross compilation
clang_15 appears to not cross compile in the build!=(host==target)
case due to two problems, which this commit fixes:

- It trips -Wmaybe-uninitialized on recent gcc, but only in the
  build!=host case (likely due to #ifdefs)

- Two more buildPlatform tools have been added:
  clang-tidy-confusable-chars-gen and clang-pseudo-gen

Co-authored-by: Rahul Butani <rrbutani@users.noreply.github.com>
2023-04-19 01:06:08 +00:00

139 lines
4.7 KiB
Nix

{ lib, stdenv, llvm_meta
, monorepoSrc, runCommand
, substituteAll, cmake, ninja, libxml2, libllvm, version, python3
, buildLlvmTools
, fixDarwinDylibNames
, enableManpages ? false
}:
let
self = stdenv.mkDerivation (rec {
pname = "clang";
inherit version;
src = runCommand "${pname}-src-${version}" {} ''
mkdir -p "$out"
cp -r ${monorepoSrc}/cmake "$out"
cp -r ${monorepoSrc}/${pname} "$out"
cp -r ${monorepoSrc}/clang-tools-extra "$out"
'';
sourceRoot = "${src.name}/${pname}";
nativeBuildInputs = [ cmake ninja python3 ]
++ lib.optional enableManpages python3.pkgs.sphinx
++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
buildInputs = [ libxml2 libllvm ];
cmakeFlags = [
"-DCLANG_INSTALL_PACKAGE_DIR=${placeholder "dev"}/lib/cmake/clang"
"-DCLANGD_BUILD_XPC=OFF"
"-DLLVM_ENABLE_RTTI=ON"
] ++ lib.optionals enableManpages [
"-DCLANG_INCLUDE_DOCS=ON"
"-DLLVM_ENABLE_SPHINX=ON"
"-DSPHINX_OUTPUT_MAN=ON"
"-DSPHINX_OUTPUT_HTML=OFF"
"-DSPHINX_WARNINGS_AS_ERRORS=OFF"
] ++ lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [
"-DLLVM_TABLEGEN_EXE=${buildLlvmTools.llvm}/bin/llvm-tblgen"
"-DCLANG_TABLEGEN=${buildLlvmTools.libclang.dev}/bin/clang-tblgen"
# Added in LLVM15:
# `clang-tidy-confusable-chars-gen`: https://github.com/llvm/llvm-project/commit/c3574ef739fbfcc59d405985a3a4fa6f4619ecdb
# `clang-pseudo-gen`: https://github.com/llvm/llvm-project/commit/cd2292ef824591cc34cc299910a3098545c840c7
"-DCLANG_TIDY_CONFUSABLE_CHARS_GEN=${buildLlvmTools.libclang.dev}/bin/clang-tidy-confusable-chars-gen"
"-DCLANG_PSEUDO_GEN=${buildLlvmTools.libclang.dev}/bin/clang-pseudo-gen"
];
patches = [
./purity.patch
# https://reviews.llvm.org/D51899
./gnu-install-dirs.patch
../../common/clang/add-nostdlibinc-flag.patch
(substituteAll {
src = ../../clang-11-12-LLVMgold-path.patch;
libllvmLibdir = "${libllvm.lib}/lib";
})
];
postPatch = ''
(cd tools && ln -s ../../clang-tools-extra extra)
'' + lib.optionalString stdenv.hostPlatform.isMusl ''
sed -i -e 's/lgcc_s/lgcc_eh/' lib/Driver/ToolChains/*.cpp
'';
outputs = [ "out" "lib" "dev" "python" ];
env = lib.optionalAttrs (stdenv.buildPlatform != stdenv.hostPlatform) {
# The following warning is triggered with (at least) gcc >=
# 12, but appears to occur only for cross compiles.
NIX_CFLAGS_COMPILE = "-Wno-maybe-uninitialized";
};
postInstall = ''
ln -sv $out/bin/clang $out/bin/cpp
# Move libclang to 'lib' output
moveToOutput "lib/libclang.*" "$lib"
moveToOutput "lib/libclang-cpp.*" "$lib"
substituteInPlace $dev/lib/cmake/clang/ClangTargets-release.cmake \
--replace "\''${_IMPORT_PREFIX}/lib/libclang." "$lib/lib/libclang." \
--replace "\''${_IMPORT_PREFIX}/lib/libclang-cpp." "$lib/lib/libclang-cpp."
mkdir -p $python/bin $python/share/clang/
mv $out/bin/{git-clang-format,scan-view} $python/bin
if [ -e $out/bin/set-xcode-analyzer ]; then
mv $out/bin/set-xcode-analyzer $python/bin
fi
mv $out/share/clang/*.py $python/share/clang
rm $out/bin/c-index-test
patchShebangs $python/bin
mkdir -p $dev/bin
cp bin/{clang-tblgen,clang-tidy-confusable-chars-gen,clang-pseudo-gen} $dev/bin
'';
passthru = {
inherit libllvm;
isClang = true;
hardeningUnsupportedFlags = [ "fortify3" ];
};
meta = llvm_meta // {
homepage = "https://clang.llvm.org/";
description = "A C language family frontend for LLVM";
longDescription = ''
The Clang project provides a language front-end and tooling
infrastructure for languages in the C language family (C, C++, Objective
C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
It aims to deliver amazingly fast compiles, extremely useful error and
warning messages and to provide a platform for building great source
level tools. The Clang Static Analyzer and clang-tidy are tools that
automatically find bugs in your code, and are great examples of the sort
of tools that can be built using the Clang frontend as a library to
parse C/C++ code.
'';
mainProgram = "clang";
};
} // lib.optionalAttrs enableManpages {
pname = "clang-manpages";
ninjaFlags = [ "docs-clang-man" ];
installPhase = ''
mkdir -p $out/share/man/man1
# Manually install clang manpage
cp docs/man/*.1 $out/share/man/man1/
'';
outputs = [ "out" ];
doCheck = false;
meta = llvm_meta // {
description = "man page for Clang ${version}";
};
});
in self