编译boost :: program_options的示例代码:http://svn.boost.org/svn/boost/trunk/libs/program_options/example/first.cpp
...在MacOS Lion(10.7.2)上,使用随MacPorts安装的boost-1.48.0:
$ clang++ -v
Apple clang version 3.0 (tags/Apple/clang-211.12) (based on LLVM 3.0svn)
Target: x86_64-apple-darwin11.2.0
Thread model: posix
$ clang++ -std=c++0x --stdlib=libc++ -lc++ -I/opt/local/include -L/opt/local/lib -lboost_program_options first.cpp -o first
Undefined symbols for architecture x86_64:
"boost::program_options::options_description::options_description(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned int, unsigned int)", referenced from:
_main in cc-6QQcwm.o
"boost::program_options::operator<<(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, boost::program_options::options_description const&)", referenced from:
_main in cc-6QQcwm.o
"boost::program_options::abstract_variables_map::operator[](std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) const", referenced from:
boost::program_options::variables_map::operator[](std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) const in …由于Boost 1.49的问题,我无法在C++程序中完成链接阶段.我已经切换到C++(-std=c++11 -libc=libc++),它适用于另一段代码(也使用boost).使用自制软件安装Boost:
brew install boost --universal --with-mpi --with-icu
问题始于boost::program_options.我得到这样的链接错误:
"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,因为在使用的库上做一个nm显示,符号似乎在那里:
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 …