Hi, does anybody know how I can compile C++11 code on Mountain Lion and lower without using libc++?
The problem I face is that rethinkdb uses std::move (and probably other features) from C++11. To do this, it checks for the clang compiler and passes -stdlib=libc++ in CXXFLAGS if it detects clang on OS X. Rethinkdb also uses protobuf-cpp, which requires linking against libprotobuf.dylib. However, libprotobuf is built against libstdc++. This leads to the following problem when rethinkdb tries to use protobuf: > Error: Unable to compile sample protobuf file. Try running ./configure with > the --fetch protoc option > Undefined symbols for architecture x86_64: > "google::protobuf::MessageFactory::InternalRegisterGeneratedFile(char > const*, void (*)(std::__1::basic_string<char, std::__1::char_traits<char>, > std::__1::allocator<char> > const&))", referenced from: > protobuf_AddDesc_mk_2fgen_2fprotoc_2ftest_2eproto() in test-umpU92.o > > "google::protobuf::DescriptorPool::FindFileByName(std::__1::basic_string<char, > std::__1::char_traits<char>, std::__1::allocator<char> > const&) const", > referenced from: > protobuf_AssignDesc_mk_2fgen_2fprotoc_2ftest_2eproto() in test-umpU92.o So the problem is that the linker is looking for the symbol in libprotobuf that was compiled against libc++ (see the usage of std::__1::basic_string, which is specific to libc++), but cannot find the symbol, because libprotobuf has been compiled against libstdc++. Any ideas how to fix this? Should I just pass --fetch protoc --static protoc to have rethinkdb compile a local version of protobuf? -- Clemens Lang _______________________________________________ macports-dev mailing list macports-dev@lists.macosforge.org https://lists.macosforge.org/mailman/listinfo/macports-dev
