{ lib, stdenv, llvm_meta, src ? null, monorepoSrc ? null, runCommand, cmake, ninja, libxml2, libllvm, release_version, version, python3, buildLlvmPackages, fixDarwinDylibNames, enableManpages ? false, enableClangToolsExtra ? true, devExtraCmakeFlags ? [ ], replaceVars, getVersionFile, fetchpatch, # for tests libclang, }: stdenv.mkDerivation ( finalAttrs: { pname = "clang"; inherit version; src = if monorepoSrc != null then runCommand "clang-src-${version}" { inherit (monorepoSrc) passthru; } '' mkdir -p "$out" cp -r ${monorepoSrc}/cmake "$out" cp -r ${monorepoSrc}/clang "$out" ${lib.optionalString enableClangToolsExtra "cp -r ${monorepoSrc}/clang-tools-extra \"$out\""} '' else src; sourceRoot = "${finalAttrs.src.name}/clang"; patches = [ (getVersionFile "clang/purity.patch") # Remove extraneous ".a" suffix from baremetal clang_rt.builtins when compiling for baremetal. # https://reviews.llvm.org/D51899 (getVersionFile "clang/gnu-install-dirs.patch") ] ++ lib.optionals (lib.versionOlder release_version "20") [ # https://github.com/llvm/llvm-project/pull/116476 # prevent clang ignoring warnings / errors for unsuppored # options when building & linking a source file with trailing # libraries. eg: `clang -munsupported hello.c -lc` ./clang-unsupported-option.patch ] # Pass the correct path to libllvm ++ [ (replaceVars ./clang-at-least-16-LLVMgold-path.patch { libllvmLibdir = "${libllvm.lib}/lib"; }) ] # Fixes a bunch of lambda-related crashes # https://github.com/llvm/llvm-project/pull/93206 ++ lib.optional (lib.versions.major release_version == "18") (fetchpatch { name = "tweak-tryCaptureVariable-for-unevaluated-lambdas.patch"; url = "https://github.com/llvm/llvm-project/commit/3d361b225fe89ce1d8c93639f27d689082bd8dad.patch"; # TreeTransform.h is not affected in LLVM 18. excludes = [ "docs/ReleaseNotes.rst" "lib/Sema/TreeTransform.h" ]; stripLen = 1; hash = "sha256-1NKej08R9SPlbDY/5b0OKUsHjX07i9brR84yXiPwi7E="; }); nativeBuildInputs = [ cmake python3 ninja ] ++ lib.optionals enableManpages [ python3.pkgs.myst-parser python3.pkgs.sphinx ] ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames; buildInputs = [ libxml2 libllvm ]; cmakeFlags = [ (lib.cmakeFeature "CLANG_INSTALL_PACKAGE_DIR" "${placeholder "dev"}/lib/cmake/clang") (lib.cmakeBool "CLANGD_BUILD_XPC" false) (lib.cmakeBool "LLVM_ENABLE_RTTI" true) (lib.cmakeBool "LLVM_INCLUDE_TESTS" false) (lib.cmakeFeature "LLVM_TABLEGEN_EXE" "${buildLlvmPackages.tblgen}/bin/llvm-tblgen") (lib.cmakeFeature "CLANG_TABLEGEN" "${buildLlvmPackages.tblgen}/bin/clang-tblgen") (lib.cmakeFeature "CLANG_TIDY_CONFUSABLE_CHARS_GEN" "${buildLlvmPackages.tblgen}/bin/clang-tidy-confusable-chars-gen") ] ++ lib.optional (lib.versionAtLeast release_version "20") ( lib.cmakeFeature "LLVM_DIR" "${libllvm.dev}/lib/cmake/llvm" ) ++ lib.optionals (lib.versionAtLeast release_version "21") [ (lib.cmakeFeature "CLANG_RESOURCE_DIR" "${placeholder "lib"}/lib/clang/${lib.versions.major release_version}") ] ++ lib.optionals enableManpages [ (lib.cmakeBool "CLANG_INCLUDE_DOCS" true) (lib.cmakeBool "LLVM_ENABLE_SPHINX" true) (lib.cmakeBool "SPHINX_OUTPUT_MAN" true) (lib.cmakeBool "SPHINX_OUTPUT_HTML" false) (lib.cmakeBool "SPHINX_WARNINGS_AS_ERRORS" false) ] ++ lib.optionals (lib.versionOlder release_version "20") [ # clang-pseudo removed in LLVM20: https://github.com/llvm/llvm-project/commit/ed8f78827895050442f544edef2933a60d4a7935 (lib.cmakeFeature "CLANG_PSEUDO_GEN" "${buildLlvmPackages.tblgen}/bin/clang-pseudo-gen") ] ++ devExtraCmakeFlags; postPatch = '' # Make sure clang passes the correct location of libLTO to ld64 substituteInPlace lib/Driver/ToolChains/Darwin.cpp \ --replace-fail 'StringRef P = llvm::sys::path::parent_path(D.Dir);' 'StringRef P = "${lib.getLib libllvm}";' (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" ]; separateDebugInfo = stdenv.buildPlatform.is64bit; # OOMs on 32 bit postInstall = '' ln -sv $out/bin/clang $out/bin/cpp '' + (lib.optionalString ((lib.versionAtLeast release_version "19") && !(lib.versionAtLeast release_version "21")) '' mv $out/lib/clang $lib/lib/clang '' ) + '' # Move libclang to 'lib' output moveToOutput "lib/libclang.*" "$lib" moveToOutput "lib/libclang-cpp.*" "$lib" 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 $dev/bin '' + lib.optionalString enableClangToolsExtra '' cp bin/clang-tidy-confusable-chars-gen $dev/bin '' + lib.optionalString (enableClangToolsExtra && lib.versionOlder release_version "20") '' cp bin/clang-pseudo-gen $dev/bin ''; env = lib.optionalAttrs (stdenv.buildPlatform != stdenv.hostPlatform && !stdenv.hostPlatform.useLLVM) { # The following warning is triggered with (at least) gcc >= # 12, but appears to occur only for cross compiles. NIX_CFLAGS_COMPILE = "-Wno-maybe-uninitialized"; }; passthru = { inherit libllvm; isClang = true; hardeningUnsupportedFlagsByTargetPlatform = targetPlatform: [ "fortify3" ] ++ lib.optional (!targetPlatform.isLinux || !targetPlatform.isx86_64) "shadowstack" ++ lib.optional (!targetPlatform.isAarch64 || !targetPlatform.isLinux) "pacret" ++ lib.optional ( !(targetPlatform.isLinux || targetPlatform.isFreeBSD) || !( targetPlatform.isx86 || targetPlatform.isPower64 || targetPlatform.isS390x || targetPlatform.isAarch64 ) ) "stackclashprotection" ++ lib.optional (!(targetPlatform.isx86_64 || targetPlatform.isAarch64)) "zerocallusedregs" ++ (finalAttrs.passthru.hardeningUnsupportedFlags or [ ]); tests.withoutOptionalFeatures = libclang.override { enableClangToolsExtra = false; }; }; requiredSystemFeatures = [ "big-parallel" ]; meta = llvm_meta // { homepage = "https://clang.llvm.org/"; description = "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}"; }; } )