From mboxrd@z Thu Jan  1 00:00:00 1970
From: Danny Milosavljevic <dannym@scratchpost.org>
Subject: bug#27563: [PATCH] gnu: ghostscript: Don't write document UUID;
	use "" as instance UUID.
Date: Fri, 7 Jul 2017 15:28:04 +0200
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To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: 27563@debbugs.gnu.org

> What=E2=80=99s the impact of simply removing all of this from generated P=
DF
> files?  Should we instead make it optional?

I don't know.  It's just one metadata element - and it's recent.  I mean th=
at there are lots of (old) PDF files that don't have it in the first place.

>  For instance, we could
> introduce a new environment variable, say =E2=80=9CGHOSTSCRIPT_PDF_UUID=
=E2=80=9D, and
> use that as the document UUID when it=E2=80=99s defined. =20

>>In our build
> environments, we=E2=80=99d always set GHOSTSCRIPT_PDF_UUID to a known val=
ue to
> ensure determinism.

Upstream definitely doesn't want that - at least not if it's a constant val=
ue for all PDFs.