# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1320929800 -3600
# Node ID e3c3fdcd091010326e98e05f1612d2b5d190197b
# Parent  cd0ee16f47e95f1282e2c9d9a24b961c67dac622
ptsname_r test: Avoid gcc warning on glibc systems.

* tests/test-ptsname_r.c (null_ptr): New function.
(test_errors): Use it.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-11-10  Bruno Haible  <bruno@clisp.org>
+
+	ptsname_r test: Avoid gcc warning on glibc systems.
+	* tests/test-ptsname_r.c (null_ptr): New function.
+	(test_errors): Use it.
+
 2011-11-10  Bruno Haible  <bruno@clisp.org>
 
 	ptsname_r: Avoid compilation error on OSF/1 5.1.
diff --git a/tests/test-ptsname_r.c b/tests/test-ptsname_r.c
--- a/tests/test-ptsname_r.c
+++ b/tests/test-ptsname_r.c
@@ -53,6 +53,12 @@
               && SAME_INODE (statbuf1, statbuf2)));
 }
 
+static char *
+null_ptr (void)
+{
+  return NULL;
+}
+
 static void
 test_errors (int fd, const char *slave)
 {
@@ -86,7 +92,7 @@
     }
 
   errno = 0;
-  result = ptsname_r (fd, NULL, 0);
+  result = ptsname_r (fd, null_ptr (), 0);
   ASSERT (result != 0);
   ASSERT (result == errno);
   ASSERT (errno == EINVAL);