From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marco van Hulten <marco@hulten.org>
Subject: Re: libvdpau: cannot open shared object
Date: Sat, 16 Dec 2017 09:08:53 +0100
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To: Ludovic =?UTF-8?B?Q291cnTDqHM=?= <ludo@gnu.org>
Cc: help-guix@gnu.org

Ludovic=E2=80=94

Je 15 dec 15:31 skribis Ludovic:
> Efraim Flashner <efraim@flashner.co.il> skribis:
>=20
> > $ VDPAU_DRIVER=3Dva_gl LD_LIBRARY_PATH=3D$(guix build libvdpau-va-gl)/l=
ib vdpauinfo
> > display: :0.0   screen: 0
> > Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared obje=
ct file: No such file or directory
> > Error creating VDPAU device: 1 =20
>=20
> Well the exact line is this:
>=20
>   VDPAU_DRIVER=3Dva_gl \
>   LD_LIBRARY_PATH=3D$(./pre-inst-env guix build libvdpau-va-gl)/lib/vdpau=
 \
>   $(guix build vdpauinfo)/bin/vdpauinfo
>=20
> Works for me!  It displays lots of things.  :-)
> [...]

It does not work for me, still cannot find 'libvdpau_va_gl.so'.
I am trying to understand the commands that you use to define
LD_LIBRARY_PATH:

    kodi@watson ~$ guix build libvdpau-va-gl
    guix build: error: libvdpau-va-gl: unknown package
    kodi@watson ~$ guix build vdpauinfo
    /gnu/store/46x8ba3q11zgq8qygqpgkv41ws9km9b1-vdpauinfo-1.0

Where can I find 'pre-inst-env'?  Does this make guix aware of the
libvdpau-va-gl package?

I'm running GuixSD 0.14.0 on real hardware, and did a pull and upgrade
just yesterday.

=E2=80=94Marco