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bug#6031: gcc 4.5 breaks optimized builds of emacs

From: Elias Pipping
Subject: bug#6031: gcc 4.5 breaks optimized builds of emacs
Date: Mon, 26 Apr 2010 17:40:40 +0200

On Sun, Apr 25, 2010 at 8:32 PM, Chong Yidong <address@hidden> wrote:
> Elias Pipping <address@hidden> writes:
>> I'm on the current HEAD of the repo.or.cz mirror of emacs which is
>> http://repo.or.cz/w/emacs.git/commit/910daaa95ca0708ad7022667e214bba4b8eb3d6b
>> When I compile a minimal version of emacs like this:
>>   $ ./configure CFLAGS="-O1 -foptimize-sibling-calls" --without-x
>> --without-alsa --without-dbus; [..]
>> with gcc 4.5 and run it via
>>   $ ./src/emacs -Q -nw
>> I get a segfault. Dropping the -foptimize-sibling-calls (which is
>> implied by -O2) makes it work again. So does using an older version of
>> gcc (e.g. 4.4.3) or running emacs outside a terminal.
> Could you do me a favor, and check whether the problem also exists for
> the latest emacs-23 pretest at ftp://alpha.gnu.org/gnu/emacs/pretest/ ?

It does not. Judging by the bisecting I did, the problem was introduced in


Kind regards,


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