cut out a syscall on thread creation in the case where guard size is 0
[musl] / include / ucontext.h
2011-02-19 Rich Felkersupport the ugly and deprecated ucontext and sigcontext...
2011-02-17 Rich Felkerucontext is no longer in the standard, so use gnu-frien...
2011-02-12 Rich Felkerinitial check-in, version 0.5.0