"Taylan Ulrich Bayırlı/Kammer" <taylanbayi...@gmail.com> writes:
> From 8bb21df5e4769797ba915a83643da57168f8dc9d Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Taylan=20Ulrich=20Bay=C4=B1rl=C4=B1/Kammer?=
> <taylanbayi...@gmail.com>
> Date: Tue, 28 Apr 2015 15:08:47 +0200
> Subject: [PATCH 2/3] gnu: mesa: Add libva input.
>
> There is a circular dependency between Mesa and libVA, so we use a
> libva-for-mesa package that builds libVA without GLX and EGL support, and use
> that for building Mesa.
>
> * gnu/packages/gl.scm (libva-for-mesa): New variable.
> (mesa): Add as input.
> ---
> gnu/packages/gl.scm | 11 +++++++++--
> 1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/gnu/packages/gl.scm b/gnu/packages/gl.scm
> index a40749e..69dd8b7 100644
> --- a/gnu/packages/gl.scm
> +++ b/gnu/packages/gl.scm
> @@ -21,6 +21,7 @@
>
> (define-module (gnu packages gl)
> #:use-module (ice-9 match)
> + #:use-module (guix build utils)
> #:use-module ((guix licenses) #:prefix l:)
> #:use-module (guix packages)
> #:use-module (guix download)
> @@ -37,6 +38,7 @@
> #:use-module (gnu packages xml)
> #:use-module (gnu packages fontutils)
> #:use-module (gnu packages guile)
> + #:use-module (gnu packages video)
> #:use-module (gnu packages xdisorg))
>
> (define-public glu
> @@ -159,6 +161,12 @@ Polygon meshes, and Extruded polygon meshes")
> also known as DXTn or DXTC) for Mesa.")
> (license l:expat)))
>
> +(define libva-for-mesa
> + (package
> + (inherit libva)
> + (inputs (alist-delete "mesa" (package-inputs libva)))
> + (arguments '(#:configure-flags '("--disable-glx" "--disable-egl")))))
> +
> (define-public mesa
> (package
> (name "mesa")
> @@ -188,8 +196,7 @@ also known as DXTn or DXTC) for Mesa.")
> ("dri3proto" ,dri3proto)
> ("presentproto" ,presentproto)
> ("expat" ,expat)
> - ;; TODO: Solve circular dependency with libva.
> - ;; ("libva" ,libva)
> + ("libva" ,libva-for-mesa)
> ("libxml2" ,libxml2)
> ;; TODO: Add 'libxml2-python' for OpenGL ES 1.1 and 2.0 support
> ("libxvmc" ,libxvmc)
> --
> 2.2.1
Look good to me, but how does it work?
According to archlinux, it will build 'gallium_drv_video.so',
described as VA-API implementation for gallium.
IIUC, libva may dlopen this gallium_drv_video.so?
