Re: Ignored patch

[Rich Felker <dalias@libc.org>]

On Fri, Jun 23, 2017 at 02:27:41PM +0300, Dmitry Golovin wrote:
> I have already posted this patch on this mailing list (the original
> subject was "Proper warning silencing patch for Clang"), but I
> didn't get any feedback about it. Maybe it is not formatted properly
> or there is some other problem with it. Please let me know if
> something is wrong with this patch.
> 
> Regards,
> Dmitry

> From c37efc541b12d8e216b7a425808e4c24c48f9213 Mon Sep 17 00:00:00 2001
> From: Dmitry Golovin <dima@golovin.in>
> Date: Fri, 9 Jun 2017 16:41:53 +0300
> Subject: [PATCH] add proper check for clang supported optimization and stop
>  complaining about unused arguements
> 
> ---
>  configure | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/configure b/configure
> index c2db298..539c9fc 100755
> --- a/configure
> +++ b/configure
> @@ -249,6 +249,7 @@ fi
>  #
>  tryflag   CFLAGS_TRY  -Werror=unknown-warning-option
>  tryflag   CFLAGS_TRY  -Werror=unused-command-line-argument
> +tryflag   CFLAGS_TRY  -Werror=ignored-optimization-argument
>  tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
>  tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
>  
> @@ -504,6 +505,13 @@ tryflag CFLAGS_AUTO -Werror=implicit-int
>  tryflag CFLAGS_AUTO -Werror=pointer-sign
>  tryflag CFLAGS_AUTO -Werror=pointer-arith
>  
> +#
> +# GCC ignores unused arguements by default, but Clang needs this extra
> +# parameter to stop printing warnings about LDFLAGS passed during
> +# compiling stage and CFLAGS passed during linking stage.
> +#
> +tryflag CFLAGS_AUTO -Qunused-arguments
> +
>  if test "x$warnings" = xyes ; then
>  tryflag CFLAGS_AUTO -Wall
>  tryflag CFLAGS_AUTO -Wno-parentheses
> -- 
> 2.13.0
> 

I think this looks good; I've just been trying to get through patch
backlog while new ones keep coming in. I'll try it and make sure it
seems to behave okay on a system with clang soon and commit it if
nothing goes wrong.

Rich