libpthread-stubs: libpthread-stubs: This library provides weak aliases for pthread functions not provided libpthread-stubs: in libc or otherwise available by default. Libraries like libxcb rely libpthread-stubs: on pthread stubs to use pthreads optionally, becoming thread-safe libpthread-stubs: when linked to libpthread, while avoiding any performance hit when libpthread-stubs: running single-threaded. libpthread-stubs: libpthread-stubs: libpthread-stubs: libpthread-stubs: