246 lines
8.1 KiB
Nix
246 lines
8.1 KiB
Nix
{
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lib,
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stdenv,
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llvm_meta,
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src ? null,
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monorepoSrc ? null,
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runCommand,
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cmake,
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ninja,
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libxml2,
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libllvm,
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release_version,
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version,
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python3,
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buildLlvmPackages,
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fixDarwinDylibNames,
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enableManpages ? false,
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enableClangToolsExtra ? true,
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devExtraCmakeFlags ? [ ],
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replaceVars,
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getVersionFile,
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fetchpatch,
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# for tests
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libclang,
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}:
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stdenv.mkDerivation (
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finalAttrs:
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{
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pname = "clang";
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inherit version;
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src =
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if monorepoSrc != null then
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runCommand "clang-src-${version}" { inherit (monorepoSrc) passthru; } ''
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mkdir -p "$out"
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cp -r ${monorepoSrc}/cmake "$out"
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cp -r ${monorepoSrc}/clang "$out"
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${lib.optionalString enableClangToolsExtra "cp -r ${monorepoSrc}/clang-tools-extra \"$out\""}
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''
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else
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src;
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sourceRoot = "${finalAttrs.src.name}/clang";
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patches = [
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(getVersionFile "clang/purity.patch")
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# Remove extraneous ".a" suffix from baremetal clang_rt.builtins when compiling for baremetal.
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# https://reviews.llvm.org/D51899
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(getVersionFile "clang/gnu-install-dirs.patch")
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]
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++ lib.optionals (lib.versionOlder release_version "20") [
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# https://github.com/llvm/llvm-project/pull/116476
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# prevent clang ignoring warnings / errors for unsuppored
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# options when building & linking a source file with trailing
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# libraries. eg: `clang -munsupported hello.c -lc`
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./clang-unsupported-option.patch
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]
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# Pass the correct path to libllvm
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++ [
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(replaceVars ./clang-at-least-16-LLVMgold-path.patch {
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libllvmLibdir = "${libllvm.lib}/lib";
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})
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]
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# Fixes a bunch of lambda-related crashes
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# https://github.com/llvm/llvm-project/pull/93206
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++ lib.optional (lib.versions.major release_version == "18") (fetchpatch {
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name = "tweak-tryCaptureVariable-for-unevaluated-lambdas.patch";
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url = "https://github.com/llvm/llvm-project/commit/3d361b225fe89ce1d8c93639f27d689082bd8dad.patch";
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# TreeTransform.h is not affected in LLVM 18.
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excludes = [
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"docs/ReleaseNotes.rst"
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"lib/Sema/TreeTransform.h"
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];
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stripLen = 1;
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hash = "sha256-1NKej08R9SPlbDY/5b0OKUsHjX07i9brR84yXiPwi7E=";
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});
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nativeBuildInputs = [
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cmake
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python3
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ninja
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]
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++ lib.optionals enableManpages [
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python3.pkgs.myst-parser
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python3.pkgs.sphinx
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]
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++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
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buildInputs = [
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libxml2
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libllvm
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];
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cmakeFlags = [
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(lib.cmakeFeature "CLANG_INSTALL_PACKAGE_DIR" "${placeholder "dev"}/lib/cmake/clang")
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(lib.cmakeBool "CLANGD_BUILD_XPC" false)
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(lib.cmakeBool "LLVM_ENABLE_RTTI" true)
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(lib.cmakeBool "LLVM_INCLUDE_TESTS" false)
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(lib.cmakeFeature "LLVM_TABLEGEN_EXE" "${buildLlvmPackages.tblgen}/bin/llvm-tblgen")
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(lib.cmakeFeature "CLANG_TABLEGEN" "${buildLlvmPackages.tblgen}/bin/clang-tblgen")
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(lib.cmakeFeature "CLANG_TIDY_CONFUSABLE_CHARS_GEN" "${buildLlvmPackages.tblgen}/bin/clang-tidy-confusable-chars-gen")
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]
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++ lib.optional (lib.versionAtLeast release_version "20") (
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lib.cmakeFeature "LLVM_DIR" "${libllvm.dev}/lib/cmake/llvm"
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)
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++ lib.optionals (lib.versionAtLeast release_version "21") [
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(lib.cmakeFeature "CLANG_RESOURCE_DIR" "${placeholder "lib"}/lib/clang/${lib.versions.major release_version}")
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]
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++ lib.optionals enableManpages [
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(lib.cmakeBool "CLANG_INCLUDE_DOCS" true)
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(lib.cmakeBool "LLVM_ENABLE_SPHINX" true)
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(lib.cmakeBool "SPHINX_OUTPUT_MAN" true)
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(lib.cmakeBool "SPHINX_OUTPUT_HTML" false)
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(lib.cmakeBool "SPHINX_WARNINGS_AS_ERRORS" false)
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]
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++ lib.optionals (lib.versionOlder release_version "20") [
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# clang-pseudo removed in LLVM20: https://github.com/llvm/llvm-project/commit/ed8f78827895050442f544edef2933a60d4a7935
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(lib.cmakeFeature "CLANG_PSEUDO_GEN" "${buildLlvmPackages.tblgen}/bin/clang-pseudo-gen")
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]
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++ devExtraCmakeFlags;
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postPatch = ''
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# Make sure clang passes the correct location of libLTO to ld64
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substituteInPlace lib/Driver/ToolChains/Darwin.cpp \
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--replace-fail 'StringRef P = llvm::sys::path::parent_path(D.Dir);' 'StringRef P = "${lib.getLib libllvm}";'
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(cd tools && ln -s ../../clang-tools-extra extra)
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''
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+ lib.optionalString stdenv.hostPlatform.isMusl ''
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sed -i -e 's/lgcc_s/lgcc_eh/' lib/Driver/ToolChains/*.cpp
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'';
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outputs = [
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"out"
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"lib"
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"dev"
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"python"
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];
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separateDebugInfo = stdenv.buildPlatform.is64bit; # OOMs on 32 bit
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postInstall = ''
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ln -sv $out/bin/clang $out/bin/cpp
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''
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+ (lib.optionalString
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((lib.versionAtLeast release_version "19") && !(lib.versionAtLeast release_version "21"))
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''
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mv $out/lib/clang $lib/lib/clang
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''
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)
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+ ''
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# Move libclang to 'lib' output
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moveToOutput "lib/libclang.*" "$lib"
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moveToOutput "lib/libclang-cpp.*" "$lib"
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mkdir -p $python/bin $python/share/clang/
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''
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+ ''
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mv $out/bin/{git-clang-format,scan-view} $python/bin
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if [ -e $out/bin/set-xcode-analyzer ]; then
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mv $out/bin/set-xcode-analyzer $python/bin
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fi
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mv $out/share/clang/*.py $python/share/clang
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rm $out/bin/c-index-test
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patchShebangs $python/bin
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mkdir -p $dev/bin
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cp bin/clang-tblgen $dev/bin
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''
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+ lib.optionalString enableClangToolsExtra ''
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cp bin/clang-tidy-confusable-chars-gen $dev/bin
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''
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+ lib.optionalString (enableClangToolsExtra && lib.versionOlder release_version "20") ''
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cp bin/clang-pseudo-gen $dev/bin
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'';
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env =
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lib.optionalAttrs (stdenv.buildPlatform != stdenv.hostPlatform && !stdenv.hostPlatform.useLLVM)
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{
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# The following warning is triggered with (at least) gcc >=
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# 12, but appears to occur only for cross compiles.
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NIX_CFLAGS_COMPILE = "-Wno-maybe-uninitialized";
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};
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passthru = {
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inherit libllvm;
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isClang = true;
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hardeningUnsupportedFlagsByTargetPlatform =
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targetPlatform:
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[ "fortify3" ]
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++ lib.optional (!targetPlatform.isLinux || !targetPlatform.isx86_64) "shadowstack"
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++ lib.optional (!targetPlatform.isAarch64 || !targetPlatform.isLinux) "pacret"
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++ lib.optional (
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!(targetPlatform.isLinux || targetPlatform.isFreeBSD)
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|| !(
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targetPlatform.isx86
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|| targetPlatform.isPower64
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|| targetPlatform.isS390x
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|| targetPlatform.isAarch64
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)
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) "stackclashprotection"
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++ lib.optional (!(targetPlatform.isx86_64 || targetPlatform.isAarch64)) "zerocallusedregs"
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++ (finalAttrs.passthru.hardeningUnsupportedFlags or [ ]);
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tests.withoutOptionalFeatures = libclang.override {
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enableClangToolsExtra = false;
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};
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};
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requiredSystemFeatures = [ "big-parallel" ];
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meta = llvm_meta // {
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homepage = "https://clang.llvm.org/";
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description = "C language family frontend for LLVM";
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longDescription = ''
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The Clang project provides a language front-end and tooling
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infrastructure for languages in the C language family (C, C++, Objective
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C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
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It aims to deliver amazingly fast compiles, extremely useful error and
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warning messages and to provide a platform for building great source
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level tools. The Clang Static Analyzer and clang-tidy are tools that
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automatically find bugs in your code, and are great examples of the sort
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of tools that can be built using the Clang frontend as a library to
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parse C/C++ code.
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'';
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mainProgram = "clang";
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};
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}
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// lib.optionalAttrs enableManpages {
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pname = "clang-manpages";
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ninjaFlags = [ "docs-clang-man" ];
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installPhase = ''
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mkdir -p $out/share/man/man1
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# Manually install clang manpage
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cp docs/man/*.1 $out/share/man/man1/
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'';
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outputs = [ "out" ];
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doCheck = false;
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meta = llvm_meta // {
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description = "man page for Clang ${version}";
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};
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}
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)
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