From: Wolfgang Jenkner <wjenkner@inode.at>
To: Joseph Mingrone <jrm@ftfl.ca>
Cc: ashish@FreeBSD.org, 22065@debbugs.gnu.org,
Paul Eggert <eggert@cs.ucla.edu>
Subject: bug#22065: core dumped during compilation (emacs-25 branch on FreeBSD 9)
Date: Sun, 14 Feb 2016 17:12:46 +0100 [thread overview]
Message-ID: <85si0vjkos.fsf@iznogoud.viz> (raw)
In-Reply-To: <867fkz16lw.fsf@phe.ftfl.ca>
On Mon, Nov 30 2015, Joseph Mingrone wrote:
> There is a compilation issue on FreeBSD 9 (which has about another
> year of life) for the emacs-25 branch. The error/warnings suggest the
> problems may be related to bug 18410. It compiles fine on FreeBSD 10.
> Attached is a build log.
The pkg-fallout list indicates that that the build has been broken since
13 Nov 2014, although at that time it failed while temacs was loading up
stuff, with a different error message.
http://docs.freebsd.org/cgi/mid.cgi?201411130859.sAD8xATU001375
According to
https://svnweb.freebsd.org/ports/head/editors/emacs-devel/Makefile?view=log
this seems to correlate to a ports update to emacs bzr version 118251
from the previous 117676 (on Aug 10 2014).
There's a prominent change concerning the stack in this time frame, viz.
commit c7dfea947eba1980fe3a23ad13f04dd40c6c0d68
Author: Dmitry Antipov
Date: Tue Sep 9 07:44:06 2014 +0400
Add macros to allocate temporary Lisp objects with alloca.
So, on FreeBSD 10, in a jail containing a basic FreeBSD 9 amd64 userland
I bisected between the above commit, which is still good, and some later
bad commit.
As USE_STACK_LISP_OBJECTS wasn't turned on by default before 2014-09-24,
I configured with
$ ./configure --without-all --without-x CPPFLAGS=-DUSE_STACK_LISP_OBJECTS=1
In the last few steps I had to delete the INLINE specifier in the
definition of local_vector_init() in src/alloc.c because it conflicted
with a declaration in src/lisp.h.
The first bad commit turns out to be
commit edb0288b83b45d295df52ce7644e897613358971
Author: Dmitry Antipov <dmantipov@yandex.ru>
Date: Mon Sep 15 18:53:23 2014 +0400
If USE_LOCAL_ALLOCATORS, allocate some Lisp objects on stack.
Unfortunately, --enable-checking or --enable-check-lisp-object-type
also somehow makes the bootstrapping failure disappear.
On a current emacs master, after adding
CPPFLAGS=-DUSE_STACK_LISP_OBJECTS=0 to the configure command line
bootstrapping emacs works (in the above jail).
Alternatively (though not very practically), adding CFLAGS="-g -O0"
works (but CFLAGS="-g -O" doesn't).
Alternatively, bootstrapping even with the oldest gcc available from
ports (4.6.4) works.
So, perhaps, the FreeBSD 9 default base cc (a patched gcc 4.2.1) has
some stack-related optimization bug, even on amd64?
next prev parent reply other threads:[~2016-02-14 16:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-30 22:10 bug#22065: core dumped during compilation (emacs-25 branch on FreeBSD 9) Joseph Mingrone
2015-12-26 21:22 ` Lars Ingebrigtsen
2016-02-13 1:08 ` Paul Eggert
2016-02-14 16:12 ` Wolfgang Jenkner [this message]
2016-02-14 19:47 ` Paul Eggert
2016-02-15 4:05 ` Joseph Mingrone
2016-02-15 5:56 ` Ashish SHUKLA
2016-02-15 8:17 ` Paul Eggert
2016-02-15 13:08 ` Wolfgang Jenkner
2016-02-15 18:51 ` Joseph Mingrone
2016-02-15 18:51 ` Joseph Mingrone
2016-02-17 3:38 ` Joseph Mingrone
2016-02-17 7:56 ` Paul Eggert
2016-02-17 13:23 ` Wolfgang Jenkner
2016-02-17 15:35 ` Joseph Mingrone
2016-02-17 17:49 ` Wolfgang Jenkner
2016-02-17 22:45 ` Joseph Mingrone
2016-02-18 13:39 ` Wolfgang Jenkner
2016-03-20 2:40 ` Paul Eggert
[not found] ` <handler.22065.D22065.145844160912708.notifdone@debbugs.gnu.org>
2016-03-20 2:52 ` bug#22065: closed (Re: bug#22065: core dumped during compilation (emacs-25 branch on FreeBSD 9)) Joseph Mingrone
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