[Bug bootstrap/12407] Need to support configure --disable-languages

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=12407

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Lewis Hyatt <lhyatt@gcc.gnu.org>:

https://gcc.gnu.org/g:0ebb94fe20846407ae22cc08b1d877d57b2a46ac

commit r16-6260-g0ebb94fe20846407ae22cc08b1d877d57b2a46ac
Author: Lewis Hyatt <lhyatt@gmail.com>
Date:   Tue Dec 16 00:15:14 2025 -0500

    configure: Support disabling specific languages [PR12407]

    Sometimes it can be desirable to get the semantics of
    --enable-languages=all, but to exclude one or more languages from the
    build. Currently this is not directly supported; the best you can do is to
    list the ones you do want to be built as arguments to --enable-languages.
    In addition to being inconvenient, this also complicates cross-platform
    portability, since --enable-languages=all carries the useful semantics that
    unsupported languages will be skipped automatically; by contrast, languages
    listed explicitly as arguments to --enable-languages will produce a hard
    error if they are not supported.

    This patch extends the syntax of --enable-languages so that, e.g.:

    --enable-languages=all,^xyz,^abc

    would build every supported language other than xyz and abc.

    ChangeLog:

            PR bootstrap/12407
            * configure.ac: Add feature to parsing of --enable-languages so
that
            a language can be disabled by prefixing it with a caret.
            * configure: Regenerate.

    gcc/ChangeLog:

            PR bootstrap/12407
            * doc/install.texi (--enable-languages): Document the new language
            exclusion feature.