AX_PTHREAD: minor changes to the AC_TRY_LINK command so that the code compiles when -Wall and -Werror are set

1 files changed, 9 insertions, 4 deletions

diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4
index 8a1d24c..37502dd 100644
--- a/m4/ax_pthread.m4
+++ b/m4/ax_pthread.m4
@@ -192,10 +192,15 @@ for flag in $ax_pthread_flags; do
         # pthread_cleanup_push because it is one of the few pthread
         # functions on Solaris that doesn't have a non-functional libc stub.
         # We try pthread_create on general principles.
-        AC_TRY_LINK([#include <pthread.h>],
-                    [pthread_t th; pthread_join(th, 0);
-                     pthread_attr_init(0); pthread_cleanup_push(0, 0);
-                     pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
+        AC_TRY_LINK([#include <pthread.h>
+	             static void routine(void* a) {a=0;}
+	             static void* start_routine(void* a) {return a;}],
+                    [pthread_t th; pthread_attr_t attr;
+                     pthread_join(th, 0);
+                     pthread_attr_init(&attr);
+                     pthread_cleanup_push(routine, 0);
+                     pthread_create(&th,0,start_routine,0);
+                     pthread_cleanup_pop(0); ],
                     [ax_pthread_ok=yes])
 
         LIBS="$save_LIBS"