Getting undefined reference to std::thread::_M_start_thread

Question

I\'m building an app that uses a 3rd party lib (Box2D-MT) which I build from sources. When linking, I get this undefined reference error:

b2Threading.cpp:(.t         


        

Answer 1

Looks like a headers/libraries version mismatch. This is what I've got:

$ nm -C /pkgs/gcc/4.9.2/lib/libstdc++.a | grep std::thread::_M_start_thread
00000000 T std::thread::_M_start_thread(std::shared_ptr)

$ nm -C /pkgs/gcc/5.2.0/lib/libstdc++.a | grep std::thread::_M_start_thread
00000000 T std::thread::_M_start_thread(std::shared_ptr)
00000000 T std::thread::_M_start_thread(std::shared_ptr, void (*)())

$ fgrep -r M_start_thread /usr/intel/pkgs/gcc/4.9.2/include/
/pkgs/gcc/4.9.2/include/c++/4.9.2/thread:        _M_start_thread(_M_make_routine(std::__bind_simple(
/pkgs/gcc/4.9.2/include/c++/4.9.2/thread:    _M_start_thread(__shared_base_type);

$ fgrep -r M_start_thread /usr/intel/pkgs/gcc/5.2.0/include/
/pkgs/gcc/5.2.0/include/c++/5.2.0/thread:        _M_start_thread(_M_make_routine(std::__bind_simple(
/pkgs/gcc/5.2.0/include/c++/5.2.0/thread:        _M_start_thread(_M_make_routine(std::__bind_simple(
/pkgs/gcc/5.2.0/include/c++/5.2.0/thread:    _M_start_thread(__shared_base_type, void (*)());
/pkgs/gcc/5.2.0/include/c++/5.2.0/thread:    _M_start_thread(__shared_base_type);