https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58909
--- Comment #20 from Jonathan Wakely <redi at gcc dot gnu.org> --- I don't think so. The linker just doesn't resolve the undefined weak symbol for pthread_cond_destroy is left equal to zero, and so there's a segfault when it gets called. $ g++ cv.C -static -g -Wl,--trace-symbol=pthread_cond_destroy -pthread /usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/10/libstdc++.a(condition_variable.o): reference to pthread_cond_destroy IIUC it's not finding the definition in libc.a, or any definition at all.
