Issue #9700: define HAVE_BROKEN_POSIX_SEMAPHORES under AIX 6.x.  Patch by
Sébastien Sablé.
diff --git a/configure.in b/configure.in
index eb753bb..f36b28c 100644
--- a/configure.in
+++ b/configure.in
@@ -2226,6 +2226,9 @@
       AIX/5) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
 		       [Define if the Posix semaphores do not work on your system])
 		       ;;
+      AIX/6) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
+                      Define if the Posix semaphores do not work on your system)
+                      ;;
       esac
 
       AC_MSG_CHECKING(if PTHREAD_SCOPE_SYSTEM is supported)