Bug#409517: dvipdfm segfault related to /etc/localtime

[Florent Rougon <f.rougon@free.fr>]

Hi everyone,

Frank Küster <frank@kuesterei.ch> wrote:

> Is there an easy way to find out which of the preprocessor conditional
> branches we're in?  I'm speaking of
>
> +#ifdef HAVE_TM_GMTOFF  /* Preferred way to get time zone offset */
> +  tz_offset = bd_time->tm_gmtoff;
> +#else
> +#ifdef HAVE_TIMEZONE   /* Plan B --- use external variable 'timezone'
> +                       /* (may not provide correct offset for daylight savings time) */
> +  tz_offset = - timezone;
> +#else                  /* Last resort --- without more information, set offset to zero */
> +  tz_offset = 0l;
> +#endif /* HAVE_TIMEZONE */
> +#endif /* HAVE_TM_GMTOFF */

Such macros (HAVE_FOOBAR) are usually defined in header files that are
generated when running ./configure (script which is usually generated
from configure.in by autoconf), and usually called config.h.

In my last build of tetex-bin (3.0-28), these macros are defined as
follows in texk/dvipdfm/config.h:

  /* define if struct tm has tm_gmtoff as a member */
  #define HAVE_TM_GMTOFF 1

  /* define if <time.h> has timezone as an external variable */
  #define HAVE_TIMEZONE 1

-- 
Florent