llvm 源码编译

升级前遇到的问题：

In file included from runqslower.bpf.c:3:
.output/vmlinux.h:2:15: error: attribute 'preserve_access_index' is not supported by '#pragma clang attribute'
#pragma clang attribute push (__attribute__((preserve_access_index)), apply_to = record)
              ^
.output/vmlinux.h:111541:15: error: '#pragma clang attribute pop' with no matching '#pragma clang attribute push'
#pragma clang attribute pop

极速下载地址：https://toscode.gitee.com/mirrors/llvm-project.git

下载

git clone https://github.com/llvm/llvm-project.git
cd llvm-project
git checkout release/12.x

配置共享库及二进制路径

配置共享库：
#cat /etc/ld.so.conf.d/llvm.conf
/junqiang/llvm-12.x/lib64

生效方式：
ldconfig

配置二进制路径：
#cat /etc/profile | grep llvm
export PATH=$PATH:/junqiang/llvm-12.x/bin

生效方式：
source /etc/profile

　　

编译：

# 编译llvm
mkdir build
cd build/
cmake .. -DLLVM_OPTIMIZED_TABLEGEN=ON -DLLVM_INCLUDE_DOCS=OFF -DLLVM_ENABLE_RTTI=ON -DLLVM_ENABLE_EH=ON -DLLVM_INSTALL_UTILS=ON -DWITH_POLLY=ON -DLINK_POLLY_INTO_TOOLS=ON -DBUILD_SHARED_LIBS=ON -DLIBOMP_ENABLE_SHARED=ON -DLLVM_ENABLE_LIBCXX=ON -DLLDB_RELOCATABLE_PYTHON=ON -DLLVM_ENABLE_FFI=ON -DCMAKE_BUILD_TYPE=Release -DCLANG_DEFAULT_CXX_STDLIB=libc++ -DCLANG_INCLUDE_TESTS=OFF -DENABLE_LINKER_BUILD_ID=ON -DENABLE_X86_RELAX_RELOCATIONS=ON -DLIBCXXABI_INCLUDE_TESTS=OFF -DLIBCXX_INCLUDE_BENCHMARKS=OFF -DLIBCXX_INCLUDE_TESTS=OFF -DLIBOMP_TSAN_SUPPORT=ON -DLLDB_BUILD_INTEL_PT=OFF -DLLDB_INCLUDE_TESTS=OFF -DLLVM_ENABLE_OCAMLDOC=OFF -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_INCLUDE_GO_TESTS=OFF -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INSTALL_BINUTILS_SYMLINKS=ON -DLLVM_TOOL_LLGO_BUILD=ON -DLLVM_TOOL_PARALLEL_LIBS_BUILD=ON -DLLVM_ENABLE_PIC=ON -DLIBUNWIND_ENABLE_SHARED=OFF -DLIBCXX_ENABLE_PEDANTIC=ON -DLIBCXXABI_LIBDIR_SUFFIX=64 -DLIBCXX_LIBDIR_SUFFIX=64 -DLIBUNWIND_LIBDIR_SUFFIX=64 -DLLVM_LIBDIR_SUFFIX=64 -DCMAKE_INSTALL_PREFIX=/junqiang/llvm-12.x -DCMAKE_C_COMPILER=/usr/local/bin/gcc ../llvm/
make -j8
make install

# 编译clang
mkdir build
cd build/
cmake .. -DLLVM_OPTIMIZED_TABLEGEN=ON -DLLVM_INCLUDE_DOCS=OFF -DLLVM_ENABLE_RTTI=ON -DLLVM_ENABLE_EH=ON -DLLVM_INSTALL_UTILS=ON -DWITH_POLLY=ON -DLINK_POLLY_INTO_TOOLS=ON -DBUILD_SHARED_LIBS=ON -DLIBOMP_ENABLE_SHARED=ON -DLLVM_ENABLE_LIBCXX=ON -DLLDB_RELOCATABLE_PYTHON=ON -DLLVM_ENABLE_FFI=ON -DCMAKE_BUILD_TYPE=Release -DCLANG_DEFAULT_CXX_STDLIB=libc++ -DCLANG_INCLUDE_TESTS=OFF -DENABLE_LINKER_BUILD_ID=ON -DENABLE_X86_RELAX_RELOCATIONS=ON -DLIBCXXABI_INCLUDE_TESTS=OFF -DLIBCXX_INCLUDE_BENCHMARKS=OFF -DLIBCXX_INCLUDE_TESTS=OFF -DLIBOMP_TSAN_SUPPORT=ON -DLLDB_BUILD_INTEL_PT=OFF -DLLDB_INCLUDE_TESTS=OFF -DLLVM_ENABLE_OCAMLDOC=OFF -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_INCLUDE_GO_TESTS=OFF -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INSTALL_BINUTILS_SYMLINKS=ON -DLLVM_TOOL_LLGO_BUILD=ON -DLLVM_TOOL_PARALLEL_LIBS_BUILD=ON -DLLVM_ENABLE_PIC=ON -DLIBUNWIND_ENABLE_SHARED=OFF -DLIBCXX_ENABLE_PEDANTIC=ON -DLIBCXXABI_LIBDIR_SUFFIX=64 -DLIBCXX_LIBDIR_SUFFIX=64 -DLIBUNWIND_LIBDIR_SUFFIX=64 -DLLVM_LIBDIR_SUFFIX=64 -DCMAKE_INSTALL_PREFIX=/junqiang/llvm-12.x -DCMAKE_C_COMPILER=/usr/local/bin/gcc ../clang
make -j8
make install