14304 2012-06-27 14:59:00 +0000 Provide some parts of librt in libc as well 2013-01-15 14:34:56 +0000 1 1 1 Unclassified glibc nptl 2.13 All All RESOLVED DUPLICATE 14743 P2 enhancement --- 1 ajax unassigned drepper.fsp 56005 ajax 2012-06-27 14:59:55 +0000 librt links against libpthread, mostly because aio_* are implemented in threads instead of in the kernel AFAICT. This is unfortunate, because many libraries would like to use (for example) clock_gettime, but doing so pulls in pthreads. Now you have no choice but to hit the more expensive thread-safe paths, because your library can't know whether multiple threads actually exist, only whether the pthread symbols are non-zero. The complementary problem also exists for applications that are unthreaded: if they link against librt, pthread symbols will be non-zero, and any thread-safe library beneath that app now has to behave thread-safely. This is especially comic when reading the clock_gettime implementation, which goes out of its way to work correctly regardless of whether __pthread_clock_gettime is available. Ideally it would be possible to provide most of these symbols from libc directly (presumably versioned so the app requires a sufficiently new libc). 59492 schwab 2013-01-15 14:34:56 +0000 The clock_* function have been moved to libc. *** This bug has been marked as a duplicate of bug 14743 ***