GNU bug report logs - #24002
configure: missing call to AC_C_FLEXIBLE_ARRAY_MEMBER

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Package: guile; Reported by: Thomas Klausner <wiz@HIDDEN>; dated Sat, 16 Jul 2016 09:14:01 UTC; Maintainer for guile is bug-guile@HIDDEN.

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Date: Wed, 15 Mar 2017 15:05:37 +0100
From: Thomas Klausner <wiz@HIDDEN>
To: Andy Wingo <wingo@HIDDEN>
Subject: Re: bug#24002: configure: missing call to AC_C_FLEXIBLE_ARRAY_MEMBER
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On Wed, Mar 01, 2017 at 09:26:52AM +0100, Andy Wingo wrote:
> Hi Thomas,
> 
> On Sat 16 Jul 2016 11:13, Thomas Klausner <wiz@HIDDEN> writes:
> 
> > On NetBSD, the build of guile-2.0.12 breaks early because
> > FLEXIBLE_ARRAY_MEMBER is not defined:
> >
> > In file included from strftime.c:33:0:
> > time-internal.h:48:14: error: 'FLEXIBLE_ARRAY_MEMBER' undeclared here (not in a function)
> >    char abbrs[FLEXIBLE_ARRAY_MEMBER];
> 
> I just pulled in an updated Gnulib which I hope fixes this problem.  If
> you build from Git then you should be able to verify the fix, or wait
> until we have another release.

I just tried the 2.1.8 release (from March 10, so after your mail),
and the problem still exists.

Cheers,
 Thomas
Information forwarded to bug-guile@HIDDEN:
bug#24002; Package guile. Full text available.

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From: Andy Wingo <wingo@HIDDEN>
To: Thomas Klausner <wiz@HIDDEN>
Subject: Re: bug#24002: configure: missing call to AC_C_FLEXIBLE_ARRAY_MEMBER
References: <20160716091303.GP23723@HIDDEN>
Date: Wed, 01 Mar 2017 09:26:52 +0100
In-Reply-To: <20160716091303.GP23723@HIDDEN> (Thomas Klausner's
 message of "Sat, 16 Jul 2016 11:13:04 +0200")
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Hi Thomas,

On Sat 16 Jul 2016 11:13, Thomas Klausner <wiz@HIDDEN> writes:

> On NetBSD, the build of guile-2.0.12 breaks early because
> FLEXIBLE_ARRAY_MEMBER is not defined:
>
> In file included from strftime.c:33:0:
> time-internal.h:48:14: error: 'FLEXIBLE_ARRAY_MEMBER' undeclared here (not in a function)
>    char abbrs[FLEXIBLE_ARRAY_MEMBER];

I just pulled in an updated Gnulib which I hope fixes this problem.  If
you build from Git then you should be able to verify the fix, or wait
until we have another release.

Thanks for the report,

Andy
Information forwarded to bug-guile@HIDDEN:
bug#24002; Package guile. Full text available.

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Date: Sat, 16 Jul 2016 11:13:04 +0200
From: Thomas Klausner <wiz@HIDDEN>
To: bug-guile@HIDDEN
Subject: configure: missing call to AC_C_FLEXIBLE_ARRAY_MEMBER
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Hi!

On NetBSD, the build of guile-2.0.12 breaks early because
FLEXIBLE_ARRAY_MEMBER is not defined:

In file included from strftime.c:33:0:
time-internal.h:48:14: error: 'FLEXIBLE_ARRAY_MEMBER' undeclared here (not in a function)
   char abbrs[FLEXIBLE_ARRAY_MEMBER];
              ^

config.h has:

/* #undef FLEXIBLE_ARRAY_MEMBER */

I think the problem is that m4/gnulib-comp.m4 has:

  if test "$HAVE_TIMEZONE_T" = 0; then
    func_gl_gnulib_m4code_flexmember
  fi

but on NetBSD, HAVE_TIMEZONE_T is 1 and so
func_gl_gnulib_m4code_flexmember is not called and
FLEXIBLE_ARRAY_MEMBER is not defined.

FLEXIBLE_ARRAY_MEMBER is used in time-internal.h which is included by:

lib/time_rz.c lib/timegm.c lib/strftime.c lib/mktime.c

so there might be more cases where this will break.

Cheers,
 Thomas
Acknowledgement sent to Thomas Klausner <wiz@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-guile@HIDDEN. Full text available.
Report forwarded to bug-guile@HIDDEN:
bug#24002; Package guile. Full text available.
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