And another warning: abort() used but <stdlib.h> not included. Fix:
2009-01-25 Bruno Haible <br...@clisp.org>
* lib/glthread/threadlib.c: Include <stdlib.h>.
--- lib/glthread/threadlib.c.orig 2009-01-25 23:43:45.000000000 +0100
+++ lib/glthread/threadlib.c 2009-01-25 23:42:40.000000000 +0100
@@ -26,6 +26,7 @@
/* Use the POSIX threads library. */
# include <pthread.h>
+# include <stdlib.h>
# if PTHREAD_IN_USE_DETECTION_HARD
