tests: add test for bogus NULL definition

[gnulib.git] / tests / test-unistd.c

diff --git a/tests/test-unistd.c b/tests/test-unistd.c
index 5fed15c..129367b 100644 (file)
--- a/tests/test-unistd.c
+++ b/tests/test-unistd.c
@@ -20,6 +20,12 @@
 
 #include <unistd.h>
 
+#include "verify.h"
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
 /* Check that the various SEEK_* macros are defined.  */
 int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };