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Date: Sat, 27 Jun 2015 19:32:18 +0300
From: "Eli Zaretskii (eliz AT gnu DOT org)" <djgpp AT delorie DOT com>
Subject: Re: Problem with configure mktime() tests
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> Date: Sat, 27 Jun 2015 18:57:15 +0300
> From: "Ozkan Sezer (sezeroz AT gmail DOT com)" <djgpp AT delorie DOT com>
> 
> On 6/26/15, Andris Pavenis (andris DOT pavenis AT iki DOT fi) <djgpp AT delorie DOT com> wrote:
> > Noticed that mktime() tests run from bash-2.05b configure script fails:
> > - goes into infinite loop when regenerated with autoconf-2.59 and gets
> > interrupted after 60 seconds due to use of alarm() in the test
> > - fail also when generated by autoconf-2.68
> >
> > See test program in attachment (configure generated by autoconf-2.68).
> > Actual failing part of the test is
> > spring_forward_gap()
> >
> > Andris
> 
> AFAICS, our code is based on tzcode-2013d, whereas the mainstream
> is at 2015e.  History at https://github.com/eggert/tz/ lists many fixes
> for undefined behaviors etc. maybe helps??

It's worth trying the latest version.  But it might not fix this
specific problem, since DJGPP is one of a very few platforms whose
time_t is an unsigned data type.