* scripts/update-copyrights: Do not update copyright notices
in licenses imported from the Linux kernel.
This should prevent glitches such as those fixed in my
recent commit.

I've updated copyright dates in glibc for 2025.  This is the patch for
the changes not generated by scripts/update-copyrights and subsequent
build / regeneration of generated files.

Tested with build-many-glibcs.py with

--exclude m68k-linux-gnu-coldfire-soft

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>

m68k-linux-gnu-coldfire-soft GCC and glibc often won't build due to

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103370

which results in build-many-glibcs.py failure.  Add an option, --exclude,
to exclude some targets.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>

Check if -finput-charset=ascii is supported before using it in
check-installed-headers.sh.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>

Tested with build-many-glibcs.py (host-libraries, compilers and glibcs
builds).

GCC 15 (e876acab6cdd84bb2b32c98fc69fb0ba29c81153) and binutils
(e7a16d9fd65098045ef5959bf98d990f12314111) both removed all Nios II
support, and the architecture has been EOL'ed by the vendor.  The
kernel still has support, but without a proper compiler there
is no much sense in keep it on glibc.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

Tested with build-many-glibcs.py (host-libraries, compilers and glibcs
builds).

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

This was discussed on the hallway track at GNU Tools Cauldron
2024.  There are concerns about stability of the big-endian
GCC backend, and Linux removed support for the only big-endian
ARC platform in commit dd7c7ab01a04d645b7e7baa8530bfd81e31a2202
("ARC: [plat-eznps]: Drop support for EZChip NPS platform").