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Date: Wed, 8 Oct 2008 22:07:32 -0500 (CDT)
From: "Sean C. Farley" <scf@FreeBSD.org>
To: Ivan Voras <ivoras@FreeBSD.org>
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Cc: freebsd-hackers@FreeBSD.org
Subject: Re: strftime's %c warning?
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On Wed, 8 Oct 2008, Ivan Voras wrote:

> I'm trying to use the %c formatter in strftime(3), documented as:
>
> "
>     %c    is replaced by national representation of time and date.
> "
>
> ... which looks useful, except that in code in which WFORMAT is defined
> as "1" I get this error:
>
> str.c: In function 'ltime':
> str.c:141: warning: '%c' yields only last 2 digits of year in some
> locales on non-BSD systems
> *** Error code 1
>
> Since the code I'm developing is definitely BSD-only (patch to pkg_*
> infrastructure), should I:
>
> a) stop using locale-based %c and choose my own date/time format
> b) remove WFORMAT from the Makefile?
>
> The same warning/error is generated by %x and %X, and %+ described in
> the strftime man page isn't recognized.

You are hitting a gcc builtin.  Have you tried adding
-fno-builtin-strftime?

Sean
-- 
scf@FreeBSD.org