[PATCH] Fix warning caused by unused-result in bug-atexit3-lib.cc

[Gabriel F. T. Gomes]

The test case dlfcn/bug-atexit3-lib.cc calls write and doesn't check the
result.  When building with GCC 6.2 from IBM's branch, this generates a
warning in 'make check', which is treated as an error.  This patch adds a
return variable to get rid of the warning and of the error.

Tested for powerpc64le.

2016-10-28  Gabriel F. T. Gomes  <gftg@linux.vnet.ibm.com>

	* dlfcn/bug-atexit3-lib.cc (statclass): Assign return of call to
	write (defined with __wur) to unused variable.
---
 dlfcn/bug-atexit3-lib.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/dlfcn/bug-atexit3-lib.cc b/dlfcn/bug-atexit3-lib.cc
index 3d01ea8..5a7c454 100644
--- a/dlfcn/bug-atexit3-lib.cc
+++ b/dlfcn/bug-atexit3-lib.cc
@@ -4,11 +4,15 @@ struct statclass
 {
   statclass()
   {
-    write (1, "statclass\n", 10);
+    size_t unused_ret;
+    (void) unused_ret;
+    unused_ret = write (1, "statclass\n", 10);
   }
   ~statclass()
   {
-    write (1, "~statclass\n", 11);
+    size_t unused_ret;
+    (void) unused_ret;
+    unused_ret = write (1, "~statclass\n", 11);
   }
 };
 
-- 
2.4.11