# HG changeset patch
# User Paul Eggert <eggert@cs.ucla.edu>
# Date 1368658484 25200
# Node ID f168b4090f6f3c8d78844a8d2a888469c4e4dcd0
# Parent  26a04e61f5604fcd38aadfc00dc34d7990df281c
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.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 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
diff --git a/lib/glthread/thread.h b/lib/glthread/thread.h
--- a/lib/glthread/thread.h
+++ b/lib/glthread/thread.h
@@ -120,7 +120,13 @@
    address of a function in libpthread that we don't use.  */
 
 #  pragma weak pthread_create
+
+#  ifdef __clang__
+  /* Without this, clang complains that pthread_sigmask is never declared.  */
+#   include <signal.h>
+#  endif
 #  pragma weak pthread_sigmask
+
 #  pragma weak pthread_join
 #  ifndef pthread_self
 #   pragma weak pthread_self