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bug#17598: Emacs pretest 24.3.91 - AIX - SIGSEV when customize

From: Paul Eggert
Subject: bug#17598: Emacs pretest 24.3.91 - AIX - SIGSEV when customize
Date: Sun, 01 Jun 2014 00:12:24 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

Eli Zaretskii wrote:

The changes to lisp.h intended to enhance debugging on AIX broke
debugging when GCC 3.x is used to compile the code: I get "No symbol
"VALMASK" in current context." when xbacktrace is invoked.

Sorry about that. It appears you ran into GCC bug 23336, an old bug I wasn't familiar with. By the time this bug was fixed in 2006, the GCC folks had stopped maintaining GCC 3.x. See:


I hope there's a way to
define the relevant macros only for AIX, so that other platforms
aren't affected, certainly not during the pretest.

I gave that a shot in emacs-24 bzr 117185.

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