tree 555f12de2da66d038226fc5a0689bafc5d80b871
parent 77780c31485eeb71e9fabf8ea9d4b1af0c3be595
author Jason Merrill <jason@redhat.com> 1746106960 -0400
committer Jason Merrill <jason@redhat.com> 1746633843 -0400

c++: let plain -Wabi warn about future changes

c_common_post_options limits flag_abi_version and flag_abi_compat_version to
actual ABI version numbers, but let's not do that for warn_abi_version; we
might want to add a warning relative to a future ABI version that isn't
available in the current release, such backporting the PR120012 warning.

Also allow plain -Wabi to include such a warning without complaining that
it's useless.

Also warn about an unsupported -fabi-version argument.

gcc/c-family/ChangeLog:

	* c-opts.cc (c_common_post_options): Let plain -Wabi warn
	about changes in a future version.

(cherry picked from commit 11e62bc6d9f8109a98facd1f90d4602869eb12e7)