如何构建LLVM并将其链接到libc ++？

Question

我正在尝试构建LLVM并将其链接到libc ++,但我无法让它工作.我下载了最新版本(LLVM 3.2).

$ CXXFLAGS=-stdlib=libc++ LDFLAGS=-stdlib=libc++ ../llvm-3.2.src/configure
$ make
llvm[0]: Constructing LLVMBuild project information.
llvm[1]: Compiling APFloat.cpp for Release+Asserts build
llvm[1]: Compiling APInt.cpp for Release+Asserts build
(etcetera)
llvm[1]: Building Release+Asserts Archive Library libLLVMTableGen.a
llvm[2]: Compiling FileCheck.cpp for Release+Asserts build
llvm[2]: Linking Release+Asserts executable FileCheck (without symbols)
Undefined symbols for architecture x86_64:
  "std::string::find_last_not_of(char, unsigned long) const", referenced from:
      llvm::SMDiagnostic::print(char const*, llvm::raw_ostream&, bool) const in libLLVMSupport.a(SourceMgr.o)
  "std::string::copy(char*, unsigned long, unsigned long) const", referenced from:
      llvm::sys::Path::makeUnique(bool, std::string*) in libLLVMSupport.a(Path.o)
  "std::string::find(char const*, unsigned long, unsigned long) const", referenced from:
      llvm::sys::getDefaultTargetTriple() in libLLVMSupport.a(Host.o)
  "std::string::find(char, unsigned long) const", referenced from:
      llvm::sys::Program::FindProgramByName(std::string const&) in libLLVMSupport.a(Program.o)
(followed by a bunch of other related linker errors)

在Gist上完成输出.

LLVM使用libstdc ++编译和链接很好,但不能用libc ++编译.我不知道为什么它不会与libc ++链接; 其他程序只是链接很好.我正在运行OS X Mountain Lion并且libc ++正在运行/usr/lib/libc++.1.dylib.使用的编译器是Apple clang 4.0版(标签/ Apple/clang-421.0.60)(基于LLVM 3.1svn).

Answer 1

相信我,我不是这方面的专家.但试试这个:

../llvm/configure --enable-libcpp

一般来说,我发现:

../llvm/configure --help

非常有帮助.