http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49445
--- Comment #2 from Juan Pedro BolĂvar Puente <raskolnikov at gnu dot org> 2011-06-17 09:35:29 UTC --- Created attachment 24553 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24553 Test case for the "undefined reference" on atom<float> bug raskolnikov@nexus9:~$ make CXXFLAGS=-std=c++0x test_atom g++ -std=c++0x test_atom.cpp -o test_atom /tmp/ccS68VP3.o: In function `main': test_atom.cpp:(.text+0x18): undefined reference to `std::atomic<float>::operator float() const' collect2: ld returned 1 exit status make: *** [test_atom] Error 1