[PATCH 6/6] libstdc++: Update AC_FOREACH to m4_foreach_w [PR103459]

[Jonathan Wakely]

On Thu, 25 Jun 2026 at 04:05, Pietro Monteiro <pietro@sociotechnical.xyz> wrote:
>
> AC_FOREACH has been deprecated by Autoconf.  Update to
> m4_foreach_w.  No changes to generated files.

OK for trunk.


>
>         PR bootstrap/103459
>
> libstdc++-v3/ChangeLog:
>
>         * configure.ac: Update AC_FOREACH to m4_foreach_w.
>
> Signed-off-by: Pietro Monteiro <pietro@sociotechnical.xyz>
> ---
>  libstdc++-v3/configure.ac | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
> index c442d068e7a..db08de7735e 100644
> --- a/libstdc++-v3/configure.ac
> +++ b/libstdc++-v3/configure.ac
> @@ -802,7 +802,7 @@ AC_CONFIG_FILES([src/libbacktrace/backtrace-supported.h])
>  # append it here.  Only modify Makefiles that have just been created.
>  #
>  # Also, get rid of this simulated-VPATH thing that automake does.
> -AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
> +AC_CONFIG_FILES(m4_foreach_w([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
>    [cat > vpsed$$ << \_EOF
>  s!`test -f '$<' || echo '$(srcdir)/'`!!
>  _EOF
> --
> 2.43.0
>