GNU bug report logs - #13408
Emacs pretest 24.2.92 - compilation error on AIX 5.3 using gcc 4.7-2

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Gilles Pion <gpion <at> lfdj.com>
To: bug-gnu-emacs <at> gnu.org
Cc: Glenn Morris <rgm <at> gnu.org>
Subject: Emacs pretest 24.2.92 - compilation error on AIX 5.3 using gcc 4.7-2
Date: Thu, 10 Jan 2013 18:46:18 +0100

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

*1st compilation error:*

sysdep.c: In function 'init_signals':
sysdep.c:1940:34: error: 'deliver_danger_signal' undeclared (first use in
this function)
sysdep.c:1940:34: note: each undeclared identifier is reported only once
for each function it appears in
gmake[1]: *** [sysdep.o] Error 1
gmake[1]: Leaving directory
`/sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92/src'
gmake: *** [src] Error 2

Have bee able to fix by adding declaration of "deliver_danger_signal"
in  sysdep.c:

  void deliver_danger_signal (int sig);

*2nd compilation error:*
(did not found a easy way to fix)

/fdj/opt/gcc-4.7/bin/gcc -std=gnu99 -c  -Demacs  -I.
-I/sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92/src -I../lib
-I/sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92/src/../lib
    -MMD -MF deps/eval.d -MP     -O2 -I/opt/freeware/include eval.c
eval.c: In function 'mark_backtrace':
eval.c:3380:20: error: invalid type argument of unary '*' (have
'Lisp_Object')
gmake[1]: *** [eval.o] Error 1
gmake[1]: Leaving directory
`/sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92/src'
gmake: *** [src] Error 2
*
*
Context:

$ /fdj/opt/gcc-4.7/bin/gcc --version
gcc (GCC) 4.7.2
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


  Where should the build process find the source code?
 /sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92
  What compiler should emacs be built with?
/fdj/opt/gcc-4.7/bin/gcc -std=gnu99 -O2 -I/opt/freeware/include
  Should Emacs use the GNU version of malloc?             yes
  Should Emacs use a relocating allocator for buffers?    yes
  Should Emacs use mmap(2) for buffer allocation?         no
  What window system should Emacs use?                    x11
  What toolkit should Emacs use?                          LUCID
  Where do we find X Windows header files?                Standard dirs
  Where do we find X Windows libraries?                   Standard dirs
  Does Emacs use -lXaw3d?                                 no
  Does Emacs use -lXpm?                                   yes
  Does Emacs use -ljpeg?                                  no
  Does Emacs use -ltiff?                                  no
  Does Emacs use a gif library?                           no
  Does Emacs use -lpng?                                   no
  Does Emacs use -lrsvg-2?                                no
  Does Emacs use imagemagick?                             no
  Does Emacs use -lgpm?                                   no
  Does Emacs use -ldbus?                                  no
  Does Emacs use -lgconf?                                 no
  Does Emacs use GSettings?                               no
  Does Emacs use -lselinux?                               no
  Does Emacs use -lgnutls?                                no
  Does Emacs use -lxml2?                                  no
  Does Emacs use -lfreetype?                              no
  Does Emacs use -lm17n-flt?                              no
  Does Emacs use -lotf?                                   no
  Does Emacs use -lxft?                                   no
  Does Emacs use toolkit scroll bars?                     no


-- 
Gilles PION

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Message #8 received at 13408 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Gilles Pion <gpion <at> lfdj.com>
Cc: 13408 <at> debbugs.gnu.org
Subject: Re: bug#13408: Emacs pretest 24.2.92 - compilation error on AIX 5.3
	using gcc 4.7-2
Date: Fri, 11 Jan 2013 01:26:15 -0500

Gilles Pion wrote:

> sysdep.c: In function 'init_signals':
> sysdep.c:1940:34: error: 'deliver_danger_signal' undeclared (first use in
> this function)
[...]
> Have bee able to fix by adding declaration of "deliver_danger_signal"
> in  sysdep.c:
>
>   void deliver_danger_signal (int sig);

Or maybe just move handle_danger_signal and deliver_danger_signal
entirely from emacs.c to sysdep.c? That's the only file that uses them,
and eg handle_fatal_signal/deliver_fatal_signal are already there.

> /fdj/opt/gcc-4.7/bin/gcc -std=gnu99 -c  -Demacs  -I.
> -I/sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92/src -I../lib
> -I/sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92/src/../lib
>     -MMD -MF deps/eval.d -MP     -O2 -I/opt/freeware/include eval.c
> eval.c: In function 'mark_backtrace':
> eval.c:3380:20: error: invalid type argument of unary '*' (have
> 'Lisp_Object')

Does anyone see what the problem is here?

Message #13 received at 13408-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 13408-done <at> debbugs.gnu.org
Subject: Re: Emacs pretest 24.2.92 - compilation error on AIX 5.3 using gcc
	4.7-2
Date: Fri, 11 Jan 2013 00:03:39 -0800

Glenn's suggestion for moving handle_danger_signal and deliver_danger_signal
seems good, so I installed a patch to do that, as emacs-24 bzr 111170.

The other problem is due to a stray '*'.  This was fixed a while ago
in the trunk, so I backported that to emacs-24 as bzr 111171.

I'll be optimistic and close the bug as fixed; if I'm wrong I'll
reopen it.

Here are the URLs for these two fixes.

http://bzr.savannah.gnu.org/lh/emacs/emacs-24/revision/111170

http://bzr.savannah.gnu.org/lh/emacs/emacs-24/revision/111171

Message #16 received at 13408 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: gpion <at> lfdj.com, 13408 <at> debbugs.gnu.org
Subject: Re: bug#13408: Emacs pretest 24.2.92 - compilation error on AIX 5.3
	using	gcc 4.7-2
Date: Fri, 11 Jan 2013 10:24:39 +0200

> From: Glenn Morris <rgm <at> gnu.org>
> Date: Fri, 11 Jan 2013 01:26:15 -0500
> Cc: 13408 <at> debbugs.gnu.org
> 
> > /fdj/opt/gcc-4.7/bin/gcc -std=gnu99 -c  -Demacs  -I.
> > -I/sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92/src -I../lib
> > -I/sg/paxdev5/D1stunix/src/emacs/24.2.92/emacs-24.2.92/src/../lib
> >     -MMD -MF deps/eval.d -MP     -O2 -I/opt/freeware/include eval.c
> > eval.c: In function 'mark_backtrace':
> > eval.c:3380:20: error: invalid type argument of unary '*' (have
> > 'Lisp_Object')
> 
> Does anyone see what the problem is here?

This is the code in question, with line 3380 the last one:

  void
  mark_backtrace (void)
  {
    register struct backtrace *backlist;
    ptrdiff_t i;

    for (backlist = backtrace_list; backlist; backlist = backlist->next)
      {
	mark_object (*backlist->function);

Shouldn't it be

	mark_object (backlist->function);

instead?

Message #19 received at 13408 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: gpion <at> lfdj.com, 13408 <at> debbugs.gnu.org
Subject: Re: bug#13408: Emacs pretest 24.2.92 - compilation error on AIX 5.3
	using	gcc 4.7-2
Date: Fri, 11 Jan 2013 11:15:56 +0200

> Date: Fri, 11 Jan 2013 00:03:39 -0800
> From: Paul Eggert <eggert <at> cs.ucla.edu>
> 
> The other problem is due to a stray '*'.  This was fixed a while ago
> in the trunk, so I backported that to emacs-24 as bzr 111171.

Do you happen to know what did GCC make out that, before the change?
Did it just ignore the dereference?

Message #22 received at 13408 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: gpion <at> lfdj.com, 13408 <at> debbugs.gnu.org
Subject: Re: bug#13408: Emacs pretest 24.2.92 - compilation error on AIX 5.3
	using	gcc 4.7-2
Date: Fri, 11 Jan 2013 11:11:25 -0800

On 01/11/2013 01:15 AM, Eli Zaretskii wrote:
>> Date: Fri, 11 Jan 2013 00:03:39 -0800
>> > From: Paul Eggert <eggert <at> cs.ucla.edu>
>> > 
>> > The other problem is due to a stray '*'.  This was fixed a while ago
>> > in the trunk, so I backported that to emacs-24 as bzr 111171.
> Do you happen to know what did GCC make out that, before the change?
> Did it just ignore the dereference?

No, GCC consistently refused to compile it.  It's just that
this code is rarely compiled -- it's normally ifdeffed out,
so GCC doesn't see the problem.  I suppose that on AIX the
code is not ifdeffed out, so that's why the bug was reported
for AIX.

In older Emacs versions, the types were different and the
"*" was OK; it became a stray "*" only fairly recently.

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