https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65756
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- Interesting. For some programs and libraries, GCC too gives a diagnostic that's more helpful than just: undefined reference to `foo' /usr/bin/ld: /tmp/cccCqEak.o: undefined reference to symbol 'pthread_create@@GLIBC_2.2.5' /lib64/libpthread.so.0: error adding symbols: DSO missing from command line