GNU bug report logs - #72145
rare Emacs screwups on x86 due to GCC bug 58416

Previous Next

Full log

View this message in rfc822 format

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Po Lu <luangruo <at> yahoo.com>
Cc: 72145 <at> debbugs.gnu.org
Subject: bug#72145: rare Emacs screwups on x86 due to GCC bug 58416
Date: Wed, 17 Jul 2024 14:56:49 -0700

[Message part 1 (text/plain, inline)]

On 2024-07-16 22:01, Paul Eggert wrote:
> We could add an AC_RUN_IFELSE test for SSE2, though I doubt whether it 
> would affect builds significantly in practice.

On second thought the rare Arch or Gentoo user could still be building 
Emacs for the Pentium III, and for such a user a run-time test on the 
build host would be a win. This can be done via the attached revised 
patch. It uses AC_LINK_IFELSE to compile and run a single program, 
instead of AC_RUN_IFELSE which (when combined with AC_COMPILE_IFELSE) 
would mean compiling two test programs and running one.

[0001-Work-around-GCC-bug-58416-when-building-for-x86.patch (text/x-patch, attachment)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.