[FYI/PUSHED] Suppress the "unused function" warning for select_strerror_r

  We only ever use one of the two overloads, so to avoid breaking -Werror
builds, supress the warning.

gdb/ChangeLog:

2019-12-10  Christian Biesinger  <cbiesinger@google.com>

	* gdbsupport/safe-strerror.c: Supress the unused function warning
	for select_strerror_r.

Change-Id: I344869a382bb36fe181b5b2a31838d1d20f58169
---
 gdb/gdbsupport/safe-strerror.c | 8 ++++++++
 1 file changed, 8 insertions(+)
  

Hi,

I'm still running into this, even with the pushed fix. I'm running 
Ubuntu 18.04.3.

On 12/10/19 4:45 PM, Christian Biesinger via gdb-patches wrote:
> We only ever use one of the two overloads, so to avoid breaking -Werror
> builds, supress the warning.
> 
> gdb/ChangeLog:
> 
> 2019-12-10  Christian Biesinger  <cbiesinger@google.com>
> 
> 	* gdbsupport/safe-strerror.c: Supress the unused function warning
> 	for select_strerror_r.
> 
> Change-Id: I344869a382bb36fe181b5b2a31838d1d20f58169
> ---
>   gdb/gdbsupport/safe-strerror.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/gdb/gdbsupport/safe-strerror.c b/gdb/gdbsupport/safe-strerror.c
> index 7425af590f..9973fa6785 100644
> --- a/gdb/gdbsupport/safe-strerror.c
> +++ b/gdb/gdbsupport/safe-strerror.c
> @@ -18,6 +18,7 @@
>      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
> @@ -26,6 +27,11 @@
>      to solve this for us because IPA does not use Gnulib but uses this
>      function.  */
>   
> +/* 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 *
>   select_strerror_r (int res, char *buf)
> @@ -40,6 +46,8 @@ select_strerror_r (char *res, char *)
>     return res;
>   }
>   
> +DIAGNOSTIC_POP
> +
>   /* Implementation of safe_strerror as defined in common-utils.h.  */
>   
>   const char *
>
  

On Wed, Dec 11, 2019 at 8:56 AM Luis Machado <luis.machado@linaro.org> wrote:
>
> Hi,
>
> I'm still running into this, even with the pushed fix. I'm running
> Ubuntu 18.04.3.

For those following along, Luis uploaded a fix:
https://sourceware.org/ml/gdb-patches/2019-12/msg00413.html

> On 12/10/19 4:45 PM, Christian Biesinger via gdb-patches wrote:
> > We only ever use one of the two overloads, so to avoid breaking -Werror
> > builds, supress the warning.
> >
> > gdb/ChangeLog:
> >
> > 2019-12-10  Christian Biesinger  <cbiesinger@google.com>
> >
> >       * gdbsupport/safe-strerror.c: Supress the unused function warning
> >       for select_strerror_r.
> >
> > Change-Id: I344869a382bb36fe181b5b2a31838d1d20f58169
> > ---
> >   gdb/gdbsupport/safe-strerror.c | 8 ++++++++
> >   1 file changed, 8 insertions(+)
> >
> > diff --git a/gdb/gdbsupport/safe-strerror.c b/gdb/gdbsupport/safe-strerror.c
> > index 7425af590f..9973fa6785 100644
> > --- a/gdb/gdbsupport/safe-strerror.c
> > +++ b/gdb/gdbsupport/safe-strerror.c
> > @@ -18,6 +18,7 @@
> >      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
> > @@ -26,6 +27,11 @@
> >      to solve this for us because IPA does not use Gnulib but uses this
> >      function.  */
> >
> > +/* 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 *
> >   select_strerror_r (int res, char *buf)
> > @@ -40,6 +46,8 @@ select_strerror_r (char *res, char *)
> >     return res;
> >   }
> >
> > +DIAGNOSTIC_POP
> > +
> >   /* Implementation of safe_strerror as defined in common-utils.h.  */
> >
> >   const char *
> >