As mentioned in https://gcc.gnu.org/PR102426 , libtool -export-symbols-regex implementation on *-solaris* blindly assumes that Sun ld is used and uses -Wl,-M
option:
if test "$GCC" = yes; then
wlarc='${wl}'
_LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-z ${wl}text ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
_LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
$CC -shared ${wl}-z ${wl}text ${wl}-M ${wl}$lib.exp ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
else
in libtool.m4.
But when GCC is configured to use GNU ld, that is wrong, for the
if test "$with_gnu_ld" = yes case it needs to use (if supports_anon_versioning)
-Wl,-version-script like e.g. on Linux.
I forwarded this bug to the mailing list.
I looked at the different options for libtool, and it seems that bug-libtool is the one to be used (and the more likely to be checked by the new maintainer).
Although, I directly asked the community to get a bit of clarification and clean-up, as there seem to be at least 3 ways to submit bugs.
Thus:
https://lists.gnu.org/archive/html/bug-libtool/2022-04/msg00001.html
Note: Closing WONTFIX as this is not a Fedora bug, and it was only created for me to not forget to follow-up.