From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ricardo Wurmus <rekado@elephly.net>
Subject: Re: Version of package fontforge
Date: Wed, 05 Jun 2019 12:07:09 +0200
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To: Tilman List <tilman.list@posteo.de>
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Hi Tilman,

> when I tried to compile lilypond, I had some problems with the package
> fontforge. In Guix it is listed as version 20190317, but when I do "fontf=
orge
> --version", i get:
>
> Copyright (c) 2000-2018 by George Williams. See AUTHORS for Contributors.
>  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.=
html>
>  with many parts BSD <http://fontforge.org/license.html>;;. Please read L=
ICENSE.
>  Based on sources from 00:00 UTC  1-Jan-1970-ML-D.
>  Based on source from git with hash:
> fontforge 00:00 UTC  1-Jan-1970
> libfontforge 19700101

We may need to patch fontforge.  The version is derived from the current
date at build time:

    fontforge-20190317/configure.ac:FONTFORGE_VERSIONDATE=3D"$(date -u $FON=
TFORGE_DATE_OPTS +'%Y%m%d')"
    fontforge-20190317/configure:#define FONTFORGE_VERSIONDATE_RAW $FONTFOR=
GE_VERSIONDATE

And that=E2=80=99s what=E2=80=99s used in fontforge-20190317/fontforge/star=
t.c.

We don=E2=80=99t run =E2=80=9Cdate=E2=80=9D during the configuration; durin=
g builds
SOURCE_DATE_EPOCH is set:

    fontforge-20190317/configure.ac:FONTFORGE_DATE_NOW=3D${SOURCE_DATE_EPOC=
H:-$(date +'%s')}

We may need to patch fontforge so that these values are properly defined.

--
Ricardo