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

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From: Jakub Martisko <jamartis <at> redhat.com>
To: 78618 <at> debbugs.gnu.org
Subject: bug#78618: Gzip 1.14 build failure on s390x (undeclared errno in dfltcc.c)
Date: Wed, 28 May 2025 13:01:25 +0200

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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

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