使用 LLVM 将问题与 OSX 上的 boost::program_options 链接起来
由于 Boost 1.49 的问题，我在 C++ 程序中无法通过链接阶段.我已切换到 C++ (-std=c++11 -libc=libc++)，它适用于另一段代码(也使用 boost).Boost 是使用自制软件安装的:
I'm having trouble getting through the linking phase in my C++ program due to problems with Boost 1.49. I have switched to C++ (-std=c++11 -libc=libc++) which works fine for another piece of code (which also uses boost). Boost was installed using homebrew with:
brew install boost --universal --with-mpi --with-icu
问题始于boost::program_options.我收到这样的链接错误:
The trouble starts with boost::program_options. I get the link errors like this:
"boost::program_options::validate(boost::any&, std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, int)", referenced from:
... etc. ...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
这有点奇怪，因为在使用的库上执行 nm 显示，该符号似乎在那里:
This is a little strange, because doing an nm on the library used reveals, that the symbol appears to be there:
nm -U /usr/local/lib/libboost_program_options-mt.dylib | grep validate
0000000000019880 - 01 0000 FUN __ZN5boost15program_options8validateERNS_3anyERKSt6vectorISbIwSt11char_traitsIwESaIwEESaIS7_EEPSsi
0000000000019880 T __ZN5boost15program_options8validateERNS_3anyERKSt6vectorISbIwSt11char_traitsIwESaIwEESaIS7_EEPSsi
00000000000199e0 - 01 0000 FUN __ZN5boost15program_options8validateERNS_3anyERKSt6vectorISbIwSt11char_traitsIwESaIwEESaIS7_EEPbi
00000000000199e0 T __ZN5boost15program_options8validateERNS_3anyERKSt6vectorISbIwSt11char_traitsIwESaIwEESaIS7_EEPbi
0000000000019930 T __ZN5boost15program_options8validateERNS_3anyERKSt6vectorISsSaISsEEPSsi
0000000000019930 - 01 0000 FUN __ZN5boost15program_options8validateERNS_3anyERKSt6vectorISsSaISsEEPSsi
0000000000019c70 - 01 0000 FUN __ZN5boost15program_options8validateERNS_3anyERKSt6vectorISsSaISsEEPbi
0000000000019c70 T __ZN5boost15program_options8validateERNS_3anyERKSt6vectorISsSaISsEEPbi
我已经尝试通过在安装前相应地设置 CXX 和 CXX_FLAGS 来诱使自制软件使用 clang 而不是 gcc 编译 boost.不过我不确定我成功了.
I have already tried coaxing homebrew to compile boost with clang instead of gcc by setting CXX and CXX_FLAGS accordingly prior to installation. Not sure I succeeded though.
不胜感激.
推荐答案
您将需要使用 clang 和 std11 标志重新编译 boost，libc++ 库与 OSX 中安装的 libstdc++ 二进制不兼容(gcc 之前的非常早期版本更改为 gpl3).如果您的 clang 版本是 3.1 或更高版本，那么您可以使用(否则将 c++11 更改为 c++0x 以获取早期版本).
You will need to recompile boost with clang and std11 flags, the libc++ library is not binary compatible with the installed libstdc++ in OSX (very early version of gcc prior to changing to gpl3). If your version of clang is 3.1 or over then you can use (otherwise change c++11 to c++0x for earlier versions).
./bootstrap.sh
mkdir build
sudo ./bjam toolset=clang cxxflags="-std=c++0x -stdlib=libc++" variant=release link=static threading=multi runtime-link=shared --build-dir=Build --layout=system --without-mpi --without-python install --prefix=/usr/local
您当然可以随意更改其中任何一个，除了
You can of course alter any of these as you wish except
toolset=clang cxxflags="-std=c++0x -stdlib=libc++"
toolset=clang cxxflags="-std=c++0x -stdlib=libc++"
这应该对你有用.
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