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Re: bug#20314: [PATCH] Make output of mdate-sh deterministic

From: Bruno Haible
Subject: Re: bug#20314: [PATCH] Make output of mdate-sh deterministic
Date: Fri, 22 Sep 2017 11:57:58 +0200
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Paul Eggert wrote:
> Unfortunately that patch to Automake's mdate-sh is not portable, as TZ='UTC' 
> is 
> not a portable setting for the TZ environment variable. POSIX says you're 
> supposed to use something like TZ='UTC0' instead. Although TZ='UTC' works 
> when 
> glibc is used, this is not necessarily true on other POSIX platforms.

Gnulib also supports MSVC, which interprets the TZ environment variable in its
own way [1][2]. From this doc and from POSIX [3], it looks to me that
would all be equivalent and portable. Can you confirm this? Or does one of
these TZ values happen to enable DST?



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