GNU bug report logs - #56549
28.1; Compilation failure for lib-src/seccomp-filter.c on x86_64 with 32 bit userspace

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ulrich Mueller <ulm <at> gentoo.org>
Subject: bug#56549: closed (Re: bug#56549: 28.1; Compilation failure for
 lib-src/seccomp-filter.c on x86_64 with 32 bit userspace)
Date: Sat, 16 Jul 2022 10:51:02 +0000

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Your bug report

#56549: 28.1; Compilation failure for lib-src/seccomp-filter.c on x86_64 with 32 bit userspace

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 56549 <at> debbugs.gnu.org.

-- 
56549: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=56549
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Philipp Stephani <p.stephani2 <at> gmail.com>
To: Ulrich Mueller <ulm <at> gentoo.org>
Cc: 56549-done <at> debbugs.gnu.org
Subject: Re: bug#56549: 28.1; Compilation failure for lib-src/seccomp-filter.c
 on x86_64 with 32 bit userspace
Date: Sat, 16 Jul 2022 12:50:44 +0200

> Am 15.07.2022 um 21:42 schrieb Ulrich Mueller <ulm <at> gentoo.org>:
> 
>>>>>> On Fri, 15 Jul 2022, Philipp Stephani wrote:
> 
>> I've now tried fixing this with commit db259d8fd369e6036df782d5fe51723a68220074.
> 
> Thank you, this fixes the problem for me.

Thanks, closing this bug then.

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From: Ulrich Mueller <ulm <at> gentoo.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.1; Compilation failure for lib-src/seccomp-filter.c on x86_64
 with 32 bit userspace
Date: Thu, 14 Jul 2022 08:46:25 +0200

Forwarding Gentoo bug https://bugs.gentoo.org/857906:

i686-pc-linux-gnu-gcc     -I. -I../src -I../lib -I. -I./../src -I./../lib  -Wl,-O1 -Wl,--as-needed  -mtune=i686 -O2 -pipe  seccomp-filter.c \                           
  -lseccomp  -o seccomp-filter                                                                                                                                          
In file included from seccomp-filter.c:62:                                                                                                                              
seccomp-filter.c: In function 'main':                                                                                                                                   
../lib/verify.h:213:41: error: static assertion failed: "verify (sizeof (long) == 8 && LONG_MIN == INT64_MIN && LONG_MAX == INT64_MAX)"                                 
  213 | # define _GL_VERIFY(R, DIAGNOSTIC, ...) _Static_assert (R, DIAGNOSTIC)                                                                                          
      |                                         ^~~~~~~~~~~~~~                                                                                                          
../lib/verify.h:273:20: note: in expansion of macro '_GL_VERIFY'                                                                                                        
  273 | # define verify(R) _GL_VERIFY (R, "verify (" #R ")", -)                                                                                                         
      |                    ^~~~~~~~~~                                                                                                                                   
seccomp-filter.c:173:3: note: in expansion of macro 'verify'                                                                                                            
  173 |   verify (sizeof (long) == 8 && LONG_MIN == INT64_MIN                                                                                                           
      |   ^~~~~~                                                                                                                                                        
../lib/verify.h:213:41: error: static assertion failed: "verify (sizeof (void *) == 8)"                                                                                 
  213 | # define _GL_VERIFY(R, DIAGNOSTIC, ...) _Static_assert (R, DIAGNOSTIC)                                                                                          
      |                                         ^~~~~~~~~~~~~~
...
seccomp-filter.c:175:3: note: in expansion of macro 'verify'                                                                                                            
  175 |   verify (sizeof (void *) == 8);                                                                                                                                
      |   ^~~~~~                                                                                                                                                        
make[1]: *** [Makefile:435: seccomp-filter] Error 1                                                                                                                     
make[1]: *** Waiting for unfinished jobs....                                                                                                                            
make[1]: Leaving directory '/var/tmp/portage/app-editors/emacs-28.1/work/emacs-28.1/lib-src'                                                                            
make: *** [Makefile:436: lib-src] Error 2

This is on an x86_64 machine with 32 bit userspace.


AFAICS, the problem is that lib-src/seccomp-filter.c (line 173) tests
for a 64 bit userspace:

  verify (sizeof (long) == 8 && LONG_MIN == INT64_MIN
          && LONG_MAX == INT64_MAX);

However, lib_src/Makefile.in (line 203) tests for 64 bit hardware:

ifeq ($(shell uname -m),x86_64)
[...]
SECCOMP_FILTER=1
endif

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