[Bug 3673] -fzero-call-used-regs=used detection fails on Linux m68k with GCC 13

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3673

Colin Watson <cjwatson at debian.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|FIXED                       |---
             Status|RESOLVED                    |REOPENED

--- Comment #2 from Colin Watson <cjwatson at debian.org> ---
Frustratingly, this patch somehow managed to regress behaviour on
Debian ppc64el (see
https://buildd.debian.org/status/fetch.php?pkg=openssh&arch=ppc64el&ver=1%3A9.7p1-3&stamp=1711920599&file=log;
also compare https://bugzilla.mindrot.org/show_bug.cgi?id=3645).  I can
run test code on this architecture, but I have no idea how adding this
extra code to this check made the check somehow pass on ppc64el when it
should have failed.

I don't suppose this check could be wrapped in AC_CACHE_CHECK somehow? 
Then, rather than bothering you with extra portability checks that
nobody really seems to understand, I could just brute-force it by
passing ac_cv_whatever=no to configure on the relevant architectures. 
I don't really want to take up a bunch of your time figuring this
nonsense out ...

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