...ollowing should be sufficient to determine the default threading implementation: bash$ $( ldd /bin/ls | grep libc.so | awk '{print $3}' ) | \ egrep -i 'threads|nptl' Native POSI…...ame of the vDSO varies across architectures. It will often show up in things like glibc's ldd (1) output. The exact name should not matter to any code, so do not hardcode it. us…...i86_gnu_pltenter(): %s (%p)\n", symname, sym->st_value); return sym->st_value; } SEE ALSO ldd (1), dlopen (3), ld.so (8), ldconfig (8)