http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54847
--- Comment #43 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-10-08 20:31:01 UTC --- Both OpenBSD and FreeBSD seem to have nanosleep calls documented as... The nanosleep() function conforms to IEEE Std 1003.1b-1993 (``POSIX'') like Apple's. On the other hand, using a patch like... Index: libstdc++-v3/config/os/bsd/darwin/os_defines.h =================================================================== --- libstdc++-v3/config/os/bsd/darwin/os_defines.h (revision 192222) +++ libstdc++-v3/config/os/bsd/darwin/os_defines.h (working copy) @@ -42,4 +42,9 @@ // Static initializer macro is buggy in darwin, see libstdc++/51906 #define _GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC +// Use nanosleep and sched_yield in libc for time.clock and +// thread.thread.this in C++11 standard. +#define _GLIBCXX_USE_NANOSLEEP 1 +#define _GLIBCXX_USE_SCHED_YIELD 1 + #endif will effectively default darwin to --enable-libstdcxx-time=yes and eliminates a configure option.
