[Bug libstdc++/119081] libstdc++.modules.json generated with incorrect relative path if configured with '--prefix=/' or '--prefix=' (empty)

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119081

--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Jason Merrill <ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:90f5dabddbdc47bfbabaabb5b560d3d5cc2acf9c

commit r15-8001-g90f5dabddbdc47bfbabaabb5b560d3d5cc2acf9c
Author: Jason Merrill <ja...@redhat.com>
Date:   Tue Mar 11 17:43:35 2025 -0400

    contrib: relpath.sh /lib /include [PR119081]

    Previously, if the common ancestor of the two paths is / we would print the
    absolute second argument, but this PR asks for a relative path in that case
    as well, which makes sense for the libstdc++.modules.json use case.

            PR libstdc++/119081

    contrib/ChangeLog:

            * relpath.sh: Give relative path even at /.