On Sun, Nov 04 2012, Blake Jones wrote:

> Hi Jani,
>
>> I'd prefer to use timegm() where available, and the suggested
>> alternative [1] elsewhere.
>> 
>> [1] http://www.kernel.org/doc/man-pages/online/pages/man3/timegm.3.html
>
> I considered this alternative, but decided against it because it's
> completely MT-unsafe.  I don't know whether libnotmuch itself is
> MT-safe, but a process which called this routine in one thread would
> temporarily throw off any timezone-related work that any other threads
> were doing, even if they weren't using libnotmuch.

Yet another idea for an alternative. Compile by entering 'sh xtimegm.c'
and then run ./xtimegm

Simple cases seems to work. Dst change may (or then may not) give one
hour difference to the expected. The test "coverage" could be easily
expanded to that ;)

Hmm, I also found this:
http://lists.gnu.org/archive/html/bug-gnulib/2003-09/msg00004.html
which does 2 mktime's and one gmtime_r (without allocating tg!)...
Pick any of these 3 -- or something different (e.g. less NIH if there is)

> Blake


Tomi