cut out a syscall on thread creation in the case where guard size is 0
[musl] / src / mman /
2011-03-03 Rich Felkerimplement POSIX shared memory
2011-02-14 Rich Felkercleaning up syscalls in preparation for x86_64 port
2011-02-12 Rich Felkerinitial check-in, version 0.5.0