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bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gc
From: |
Paul Eggert |
Subject: |
bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2 |
Date: |
Wed, 13 Feb 2013 18:49:02 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 |
On 02/13/2013 03:33 PM, Glenn Morris wrote:
> since it apparently worked in Emacs 24.2, then in emacs-24
> branch at this stage we should just do the minimum to get
> it back to that working state, and save improvements for trunk.
We can certainly give that a try. Looking at unexaix.c, the
changes made between 24.2 and 24.2.93 are small. The first
change to unexaix.c, in emacs-24 bzr 108226
<http://bzr.savannah.gnu.org/lh/emacs/emacs-24/revision/108226>,
fixed a bug privately reported to me by Gilles on
2012-05-09; he already tested this so it shouldn't be the
problem. The remaining changes are small: it shouldn't hurt
to undo them but the real problem surely lies elsewhere.
I see two main suspects. First, we got rid of DATA_START
and DATA_SEG_BITS on AIX. Second, USE_LSB_TAG changed from
0 to 1 on AIX.
And now that I look at the code again, I see a serious bug
in Emacs 24.2.93's src/lisp.h when DATA_SEG_BITS is nonzero:
it mis-defines XPNTR as if DATA_SEG_BITS were zero. This is a
regression and should be fixed in emacs-24 regardless of the
AIX fixes, I expect.
So: Gilles, can you please try the following?
First, aply the attached patch to a fresh copy of emacs-24.2.93.
Then, run these shell commands:
./configure CPPFLAGS='-DDATA_START=0x20000000 -DDATA_SEG_BITS=0x20000000
-DUSE_LSB_TAG=0'
make
If this works, I'll have some followup questions and
proposed changes; the point of the above is to try to test
reverting to 24.2's approach as quickly and painlessly as
possible, without reverting all the other changes we've
made.
aix.txt
Description: Text document
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, (continued)
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Glenn Morris, 2013/02/07
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Gilles Pion, 2013/02/08
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Gilles Pion, 2013/02/11
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Paul Eggert, 2013/02/11
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Gilles Pion, 2013/02/12
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Paul Eggert, 2013/02/12
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Gilles Pion, 2013/02/13
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Glenn Morris, 2013/02/13
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Paul Eggert, 2013/02/13
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Glenn Morris, 2013/02/13
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2,
Paul Eggert <=
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Gilles Pion, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Paul Eggert, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Gilles Pion, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Paul Eggert, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Gilles Pion, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Paul Eggert, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Gilles Pion, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Stefan Monnier, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Paul Eggert, 2013/02/14
- bug#13650: Emacs pretest 24.2.93 - compilation error on AIX 5.3 using gcc 4.7-2, Glenn Morris, 2013/02/14