Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -61,9 +61,7 @@ _ldflags=${LDFLAGS}
 AC_MSG_CHECKING([compiler flag -Wno-pointer-sign])
 _cflags="${CFLAGS}"
 CFLAGS="$CFLAGS -Wno-pointer-sign"
-AC_TRY_COMPILE( , [
-    int main(void) { return 0; }
-  ],[
+AC_TRY_COMPILE( , [],[
     AC_MSG_RESULT([yes])
   ],[
     AC_MSG_RESULT([no])