2013-05-15 Paul Eggert <eggert@cs.ucla.edu>
+ thread: port --enable-gcc-warnings to clang
+ * lib/glthread/thread.h [__clang__ && USE_POSIX_THREADS_WEAK]:
+ Include <signal.h>, to pacify a warning about pthread_sigmask.
+
stdio: use __REDIRECT for fwrite, fwrite_unlocked
* lib/stdio.in.h (fwrite):
When working around bug 11959, use __REDIRECT rather than '#define