GNU bug report logs - #78618
Gzip 1.14 build failure on s390x (undeclared errno in dfltcc.c)

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

From: Jakub Martisko <jamartis <at> redhat.com>
To: bug-gzip <at> gnu.org
Subject: Gzip 1.14 build failure on s390x (undeclared errno in dfltcc.c)
Date: Wed, 28 May 2025 13:01:25 +0200

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

Hello,

while rebasing the gzip in fedora I've encountered the build failure from
the $SUBJ.
A bit more info:
- happens only when configured with the --enable-dfltcc
- introduced  by the [1] (the "errno" variable doesn't seem to be used
outside of the scope of the patch)
- build completes when the "--enable-dfltcc" is not used or when the [1] is
reversed
- The actual error (I can provide patch if needed):

dfltcc.c:441:15: error: 'errno' undeclared (first use in this function)
  441 |               errno = 0;
      |               ^~~~~
dfltcc.c:28:1: note: 'errno' is defined in header '<errno.h>'; this is
probably fixable by adding '#include <errno.h>'
   27 | #include "gzip.h"
  +++ |+#include <errno.h>
   28 |
dfltcc.c:441:15: note: each undeclared identifier is reported only
once for each function it appears in
  441 |               errno = 0;
      |               ^~~~~
make[2]: *** [Makefile:2050: dfltcc.o] Error 1




[1]:
https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?h=v1.14&id=23ddd95f3e152423fe0dfc96ff31d4130a65e8cf

[Message part 2 (text/html, inline)]

Message #10 received at 78618-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Jakub Martisko <jamartis <at> redhat.com>
Cc: 78618-done <at> debbugs.gnu.org
Subject: Re: bug#78618: Gzip 1.14 build failure on s390x (undeclared errno in
 dfltcc.c)
Date: Fri, 30 May 2025 12:32:56 -0700

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

Thanks for reporting that. I installed the attached slightly-different 
patch (different because it includes errno.h in same order as other files).

[0001-gzip-fix-s390x-build-failure.patch (text/x-patch, attachment)]

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