如何为Android编译LLVM/Clang？

问题描述 投票：0回答：3

我正在尝试在 mac 上使用 Cmake 编译适用于 Android 的 LLVM/Clang 8.0.1（因为不再支持我之前使用的自动工具）。

我正在使用https://github.com/llvm/llvm-project.git。 在构建目录中，我使用以下配置脚本（遵循手册）：

cmake ../llvm \
-DCMAKE_INSTALL_PREFIX=/Users/asmirnov/Library/Android/llvm_android_arm \
-DLLVM_ENABLE_PROJECTS=clang \
-DLLVM_ENABLE_TERMINFO=OFF \
-DLLVM_ENABLE_THREADS=OFF \
-DCMAKE_BUILD_TYPE=Release \
-DLLVM_TARGETS_TO_BUILD="ARM;X86" \
-DLIBCLANG_BUILD_STATIC=ON \
-DLLVM_INCLUDE_TESTS=OFF \
-DLLVM_ENABLE_ZLIB=OFF \
\
-DCMAKE_CROSSCOMPILING=True \
-DLLVM_TABLEGEN=/Users/asmirnov/Library/Android/llvm/bin/llvm-tblgen \
-DCLANG_TABLEGEN=/Users/asmirnov/Documents/dev/src/llvm-project/build/bin/clang-tblgen \
-DLLVM_DEFAULT_TARGET_TRIPLE=arm-linux-gnueabihf \
-DLLVM_TARGET_ARCH=ARM \
-DBUILD_SHARED_LIBS=ON \
-DLLVM_ENABLE_PIC=False \
-DCMAKE_TOOLCHAIN_FILE=/Users/asmirnov/Library/Android/ndk/android-ndk-r20/build/cmake/android.toolchain.cmake

如您所见，我正在使用 Android NDK (20) 中的 CMake 工具链文件。 我还在本地编译了它并通过了

LLVM_TABLEGEN
和
CLANG_TABLEGEN
。 配置成功，但在构建过程中出现以下错误：

/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:27: error: undefined reference to 'llvm::Pass::~Pass()'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:33: error: undefined reference to 'llvm::errs()'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:34: error: undefined reference to 'llvm::errs()'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:34: error: undefined reference to 'llvm::Value::getName() const'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:34: error: undefined reference to 'llvm::raw_ostream::write_escaped(llvm::StringRef, bool)'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/include/llvm/Support/raw_ostream.h:149: error: undefined reference to 'llvm::raw_ostream::write(unsigned char)'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/include/llvm/Support/raw_ostream.h:174: error: undefined reference to 'llvm::raw_ostream::write(char const*, unsigned int)'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:45: error: undefined reference to 'llvm::Pass::~Pass()'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:51: error: undefined reference to 'llvm::errs()'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:52: error: undefined reference to 'llvm::errs()'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:52: error: undefined reference to 'llvm::Value::getName() const'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/lib/Transforms/Hello/Hello.cpp:52: error: undefined reference to 'llvm::raw_ostream::write_escaped(llvm::StringRef, bool)'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/include/llvm/PassSupport.h:98: error: undefined reference to 'llvm::PassRegistry::getPassRegistry()'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/include/llvm/PassSupport.h:98: error: undefined reference to 'llvm::PassRegistry::registerPass(llvm::PassInfo const&, bool)'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/include/llvm/PassSupport.h:98: error: undefined reference to 'llvm::PassRegistry::getPassRegistry()'
/Users/asmirnov/Documents/dev/src/llvm-project/llvm/include/llvm/PassSupport.h:98: error: undefined reference to 'llvm::PassRegistry::registerPass(llvm::PassInfo const&, bool)'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::~Pass()'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::getPassName() const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::print(llvm::raw_ostream&, llvm::Module const*) const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::FunctionPass::createPrinterPass(llvm::raw_ostream&, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&) const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::FunctionPass::assignPassManager(llvm::PMStack&, llvm::PassManagerType)'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::preparePassManager(llvm::PMStack&)'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::FunctionPass::getPotentialPassManagerType() const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::getAnalysisUsage(llvm::AnalysisUsage&) const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::releaseMemory()'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::getAdjustedAnalysisPointer(void const*)'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::getAsImmutablePass()'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::getAsPMDataManager()'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::verifyAnalysis() const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello: error: undefined reference to 'llvm::Pass::dumpPassStructure(unsigned int)'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::~Pass()'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::getPassName() const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::print(llvm::raw_ostream&, llvm::Module const*) const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::FunctionPass::createPrinterPass(llvm::raw_ostream&, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&) const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::FunctionPass::assignPassManager(llvm::PMStack&, llvm::PassManagerType)'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::preparePassManager(llvm::PMStack&)'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::FunctionPass::getPotentialPassManagerType() const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::releaseMemory()'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::getAdjustedAnalysisPointer(void const*)'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::getAsImmutablePass()'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::getAsPMDataManager()'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::verifyAnalysis() const'
CMakeFiles/LLVMHello.dir/Hello.cpp.o:Hello.cpp:vtable for (anonymous namespace)::Hello2: error: undefined reference to 'llvm::Pass::dumpPassStructure(unsigned int)'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/LLVMHello.so] Error 1
make[1]: *** [lib/Transforms/Hello/CMakeFiles/LLVMHello.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

我做错了什么吗？是 LLVM/Clang 错误吗？有什么解决办法吗？

android android-ndk clang cross-compiling llvm-clang
3个回答
1
投票

我不知道这是否是您唯一的问题，但这绝对是错误的，可能会导致 Clang 找不到正确的库：

-DLLVM_DEFAULT_TARGET_TRIPLE=arm-linux-gnueabihf

Android 是 

arm-linux-androideabi$API_LEVEL
。 
arm-linux-gnueabihf
是 GNU/Linux 目标。

1
投票

是的，这需要一些类似于this的解决方法。还用

-DLLVM_DEFAULT_TARGET_TRIPLE="armv7a-linux-androideabi"

0
投票

我按照 LLVM_TARGETS_TO_BUILD="host" 的 BLFS 指令为 root aarch64 手机编译 LLVM/Clang，这是 aarch64 并且不使用 DEFAULT_TARGET_TRIPLE。构建使 Termux 崩溃，直到我制作并交换了 20G 交换文件并使用“-j1”运行构建

最新问题
© www.soinside.com 2019 - 2024. All rights reserved.