{ fetchurl, mkDerivationStage2 , stage1, static-gnumake, static-binutils, intermediate-musl, gnugcc10 , linux-headers, cmake, python}: let source-tarball-llvm = fetchurl { # local = /downloads/llvm-project-17.0.1.src.tar.xz; url = "https://github.com/llvm/llvm-project/releases/download/llvmorg-17.0.1/llvm-project-17.0.1.src.tar.xz"; sha256 = "b0e42aafc01ece2ca2b42e3526f54bebc4b1f1dc8de6e34f46a0446a13e882b9"; }; in mkDerivationStage2 { name = "bootstrap-2a9-intermediate-clang"; buildInputPaths = [ "${stage1.protobusybox}/bin" "${static-gnumake}/wrappers" "${static-binutils}/bin" "${gnugcc10}/bin" "${cmake}/bin" "${python}/bin" ]; script = '' # Shared libs are not relinked on install. Instead, their rpath # is erased with RPATH_SET: `Set runtime path of # "/nix/store/.../lib/x86_64-unknown-linux-musl/libc++.so.1.0" to ""` # One (hacky) workaround to that is using a constant-len build-dir. build_dir=build-dir; expr "$(pwd)/$build_dir)" '<=' 128 while ! echo "$(pwd)/$build_dir" | wc -c | grep -Fqx 128; do build_dir="$build_dir." done; expr "$(echo $(pwd)/$build_dir | wc -c)" '==' 128 mkdir $build_dir; cd $build_dir export SHELL=${stage1.protobusybox}/bin/ash # llvm cmake configuration should pick up ccache automatically from PATH export PATH="$PATH:/ccache/bin" command -v ccache && USE_CCACHE=YES || USE_CCACHE=NO # prepare future sysroot: SYSROOT=$out/sysroot mkdir -p $SYSROOT/lib $SYSROOT/include ln -s ${intermediate-musl}/lib/* $SYSROOT/lib/ ln -s ${intermediate-musl}/include/* $SYSROOT/include/ # unpack: unpack ${source-tarball-llvm} # fixup: sed -i "s|COMMAND sh|COMMAND ${stage1.protobusybox}/bin/ash|" \ llvm/cmake/modules/GetHostTriple.cmake clang/CMakeLists.txt echo 'echo x86_64-unknown-linux-musl' > llvm/cmake/config.guess LOADER=${intermediate-musl}/lib/libc.so sed -i "s|/lib/ld-musl-\" + ArchName + \".so.1|$LOADER|" \ clang/lib/Driver/ToolChains/Linux.cpp BEGINEND='const bool HasCRTBeginEndFiles' sed -i "s|$BEGINEND =|$BEGINEND = false; ''${BEGINEND}_unused =|" \ clang/lib/Driver/ToolChains/Gnu.cpp REL_ORIGIN='_install_rpath \"\$ORIGIN/../lib''${LLVM_LIBDIR_SUFFIX}\"' sed -i "s|_install_rpath \"\\\\\$ORIGIN/..|_install_rpath \"$out|" \ llvm/cmake/modules/AddLLVM.cmake sed -i 's|numShards = 32;|numShards = 1;|' lld/*/SyntheticSections.* sed -i 's|numShards = 256;|numShards = 1;|' lld/*/ICF.cpp sed -i 's|__FILE__|"__FILE__"|' \ libcxx/src/verbose_abort.cpp \ libcxxabi/src/abort_message.cpp \ compiler-rt/lib/builtins/int_util.h sed -i 's|"@LLVM_SRC_ROOT@"|"REDACTED"|' \ llvm/tools/llvm-config/BuildVariables.inc.in sed -i 's|"@LLVM_OBJ_ROOT@"|"REDACTED"|' \ llvm/tools/llvm-config/BuildVariables.inc.in # figure out includes: EXTRA_INCL="$(pwd)/extra_includes" mkdir -p $EXTRA_INCL cp clang/lib/Headers/*intrin*.h $EXTRA_INCL/ cp clang/lib/Headers/mm_malloc.h $EXTRA_INCL/ [ -e $EXTRA_INCL/immintrin.h ] # configure: export LD_LIBRARY_PATH=${gnugcc10}/lib BOTH_STAGES_OPTS="" add_opt() { BOTH_STAGES_OPTS="$BOTH_STAGES_OPTS -D$1 -DBOOTSTRAP_$1" } add_opt CMAKE_BUILD_TYPE=MinSizeRel add_opt LLVM_OPTIMIZED_TABLEGEN=YES add_opt LLVM_CCACHE_BUILD=$USE_CCACHE add_opt DEFAULT_SYSROOT=$SYSROOT add_opt CMAKE_INSTALL_PREFIX=$out add_opt LLVM_INSTALL_BINUTILS_SYMLINKS=YES add_opt LLVM_INSTALL_CCTOOLS_SYMLINKS=YES add_opt CMAKE_INSTALL_DO_STRIP=YES add_opt LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=YES add_opt LLVM_TARGET_ARCH=X86 add_opt LLVM_TARGETS_TO_BUILD=Native add_opt LLVM_BUILTIN_TARGETS=x86_64-unknown-linux-musl add_opt LLVM_DEFAULT_TARGET_TRIPLE=x86_64-unknown-linux-musl add_opt LLVM_HOST_TRIPLE=x86_64-unknown-linux-musl add_opt COMPILER_RT_DEFAULT_TARGET_TRIPLE=x86_64-unknown-linux-musl add_opt LLVM_APPEND_VC_REV=NO add_opt LLVM_INCLUDE_TESTS=NO add_opt LLVM_INCLUDE_EXAMPLES=NO add_opt LLVM_INCLUDE_BENCHMARKS=NO add_opt LLVM_ENABLE_BACKTRACES=NO add_opt LLVM_ENABLE_EH=YES add_opt LLVM_ENABLE_RTTI=YES add_opt CLANG_ENABLE_ARCMT=NO add_opt CLANG_ENABLE_STATIC_ANALYZER=NO add_opt COMPILER_RT_BUILD_SANITIZERS=NO add_opt COMPILER_RT_BUILD_XRAY=NO add_opt COMPILER_RT_BUILD_LIBFUZZER=NO add_opt COMPILER_RT_BUILD_PROFILE=NO add_opt COMPILER_RT_BUILD_MEMPROF=NO add_opt COMPILER_RT_BUILD_ORC=NO add_opt COMPILER_RT_USE_BUILTINS_LIBRARY=YES add_opt CLANG_DEFAULT_CXX_STDLIB=libc++ add_opt CLANG_DEFAULT_LINKER=lld add_opt CLANG_DEFAULT_RTLIB=compiler-rt add_opt LIBCXX_HAS_MUSL_LIBC=YES add_opt LIBCXX_USE_COMPILER_RT=YES add_opt LIBCXX_INCLUDE_BENCHMARKS=NO add_opt LIBCXX_CXX_ABI=libcxxabi add_opt LIBCXXABI_USE_COMPILER_RT=YES add_opt LIBCXXABI_USE_LLVM_UNWINDER=YES add_opt LIBCXX_ADDITIONAL_COMPILE_FLAGS=-I${linux-headers}/include add_opt LLVM_INSTALL_TOOLCHAIN_ONLY=YES add_opt LIBUNWIND_USE_COMPILER_RT=YES add_opt LLVM_ENABLE_THREADS=NO cmake -S llvm -B build -G 'Unix Makefiles' \ -DLLVM_ENABLE_PROJECTS='clang;lld' \ -DLLVM_ENABLE_RUNTIMES='compiler-rt;libcxx;libcxxabi;libunwind' \ -DGCC_INSTALL_PREFIX=${gnugcc10} \ "-DBOOTSTRAP_CMAKE_C_FLAGS=-isystem $EXTRA_INCL" \ "-DBOOTSTRAP_CMAKE_CXX_FLAGS=-isystem $EXTRA_INCL" \ -DCLANG_ENABLE_BOOTSTRAP=YES $BOTH_STAGES_OPTS # build (stage1): make -C build -j $NPROC clang lld runtimes # build/install (stage2): NEW_LIB_DIR="$(pwd)/build/lib/x86_64-unknown-linux-musl" export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$NEW_LIB_DIR" make -C build -j $NPROC stage2 stage2-install ln -s $out/lib/x86_64-unknown-linux-musl/* $out/lib/ mkdir -p $out/bin/generic-names ln -s $out/bin/clang $out/bin/generic-names/cc ln -s $out/bin/clang++ $out/bin/generic-names/c++ ln -s $out/bin/clang-cpp $out/bin/generic-names/cpp # mix new stuff into sysroot ln -s $out/lib/* $out/sysroot/lib/ # check for build path leaks: ( ! grep -rF $(pwd) $out ) ''; }