Re: [PATCH] gdb: Silence -Wformat-nonliteral warning with clang

[Kevin Buettner <kevinb at redhat dot com>]

On Fri, 11 Oct 2019 16:54:26 -0400
Simon Marchi <simon.marchi@efficios.com> wrote:

> We get this warning when building with clang:
> 
>       CXX    ui-out.o
>     /home/smarchi/src/binutils-gdb/gdb/ui-out.c:590:22: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
>       do_message (style, format, args);
>                          ^~~~~~
> 
> This can be considered a legitimate warning, as call_do_message's format
> parameter is not marked as a format string.  Therefore, we should
> normally mark the call_do_message method with the `format` attribute.
> However, doing so just moves (and multiplies) the problem, as all the
> uses of call_do_message in the vmessage method now warn.  If we wanted
> to continue on that path, we should silence the warning for each of
> them, as a way of telling the compiler "it's ok, we know what we are
> doing".
> 
> But since call_do_message is really just vmessage's little helper, it's
> simpler to just silence the warning at that single point.
> 
> gdb/ChangeLog:
> 
> 	* ui-out.c (ui_out::call_do_message): Silence
> 	-Wformat-nonliteral warning.

LGTM.

Kevin