GNU bug report logs - #22065
core dumped during compilation (emacs-25 branch on FreeBSD 9)

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Wolfgang Jenkner <wjenkner <at> inode.at>, Joseph Mingrone <jrm <at> ftfl.ca>
Cc: ashish <at> FreeBSD.org, 22065 <at> debbugs.gnu.org, Dmitry Antipov <dmantipov <at> yandex.ru>
Subject: bug#22065: core dumped during compilation (emacs-25 branch on FreeBSD 9)
Date: Sun, 14 Feb 2016 11:47:57 -0800

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

Wolfgang Jenkner wrote:
> So, perhaps, the FreeBSD 9 default base cc (a patched gcc 4.2.1) has
> some stack-related optimization bug, even on amd64?

Thanks for the detective work. It inspired me to search GCC bug reports, where I 
found a couple that appear to be directly relevant. The corresponding bug was 
fixed in 2008 but GCC 4.2.1 predates the fix. I installed the attached patch 
into the emacs-25 branch, and I hope it works around the compiler bug with 
stack-allocated Lisp objects on FreeBSD 9. Please give it a try.

[emacs.diff (text/x-diff, attachment)]

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