Re: [PATCH PING] build: add -Wconditionally-supported to strict_warn [PR64867]

[Jason Merrill <jason@redhat.com>]

On 12/6/22 08:26, Jason Merrill wrote:
> Tested x86_64-pc-linux-gnu, OK for trunk?

Ping.

> -- 8< --
> 
> The PR (which isn't resolved by this commit) pointed out to me that GCC
> should build with -Wconditionally-supported to support bootstrapping with a
> C++11 compiler that makes different choices.
> 
> 	PR c++/64867
> 
> gcc/ChangeLog:
> 
> 	* configure.ac (strict_warn): Add -Wconditionally-supported.
> 	* configure: Regenerate.
> ---
>   gcc/configure.ac | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/gcc/configure.ac b/gcc/configure.ac
> index 7ca08726efa..12771fc292c 100644
> --- a/gcc/configure.ac
> +++ b/gcc/configure.ac
> @@ -580,7 +580,7 @@ ACX_PROG_CC_WARNING_OPTS(
>   	m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes ],
>   		       [])), [c_loose_warn])
>   ACX_PROG_CXX_WARNING_OPTS(
> -	m4_quote(m4_do([-Wmissing-format-attribute ],
> +	m4_quote(m4_do([-Wmissing-format-attribute ], [-Wconditionally-supported ],
>   		       [-Woverloaded-virtual])), [strict_warn])
>   ACX_PROG_CC_WARNING_OPTS(
>   	m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
> 
> base-commit: d19aa6af6634b1e97f38431ad091f3b3f12baf2f