[review v2] Fix unused function error

[Luis Machado (Code Review)]

Change URL: https://gnutoolchain-gerrit.osci.io/r/c/binutils-gdb/+/753
......................................................................

Fix unused function error

Attempting to build GDB in Ubuntu 18.04.3 on x86_64, i ran into warnings
that caused the build to fail. For some reason the diagnostics macros don't
work for my case, but ATTRIBUTE_UNUSED does.

The compiler version is gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0.

gdb/ChangeLog:

2019-12-11  Luis Machado  <luis.machado@linaro.org>

	* gdb/gdbsupport/safe-strerror.c: Remove diagnostics.h
	(select_strerror_r): Use ATTRIBUTED_UNUSED instead of the diagnostics
	macros.

Change-Id: Iad6123d61d76d111e3ef8d24aa8c60112304c749
---
M gdb/gdbsupport/safe-strerror.c
1 file changed, 2 insertions(+), 7 deletions(-)



diff --git a/gdb/gdbsupport/safe-strerror.c b/gdb/gdbsupport/safe-strerror.c
index 9973fa6..9126507 100644
--- a/gdb/gdbsupport/safe-strerror.c
+++ b/gdb/gdbsupport/safe-strerror.c
@@ -18,7 +18,6 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "common-defs.h"
-#include "diagnostics.h"
 #include <string.h>
 
 /* There are two different versions of strerror_r; one is GNU-specific, the
@@ -29,25 +28,21 @@
 
 /* We only ever use one of the two overloads, so suppress the warning for
    an unused function.  */
-DIAGNOSTIC_PUSH
-DIAGNOSTIC_IGNORE_UNUSED_FUNCTION
 
 /* Called if we have a XSI-compliant strerror_r.  */
-static char *
+ATTRIBUTE_UNUSED static char *
 select_strerror_r (int res, char *buf)
 {
   return res == 0 ? buf : nullptr;
 }
 
 /* Called if we have a GNU strerror_r.  */
-static char *
+ATTRIBUTE_UNUSED static char *
 select_strerror_r (char *res, char *)
 {
   return res;
 }
 
-DIAGNOSTIC_POP
-
 /* Implementation of safe_strerror as defined in common-utils.h.  */
 
 const char *

-- 
Gerrit-Project: binutils-gdb
Gerrit-Branch: master
Gerrit-Change-Id: Iad6123d61d76d111e3ef8d24aa8c60112304c749
Gerrit-Change-Number: 753
Gerrit-PatchSet: 2
Gerrit-Owner: Luis Machado <luis.machado@linaro.org>
Gerrit-MessageType: newpatchset