From 88befe34eb2d92fe81ac2a897934b9aad0b9a22d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Taylan=20Ulrich=20Bay=C4=B1rl=C4=B1/Kammer?=
 <taylanbayirli@gmail.com>
Date: Tue, 28 Apr 2015 15:08:47 +0200
Subject: [PATCH 3/4] 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 | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/gl.scm b/gnu/packages/gl.scm
index a40749e..8159073 100644
--- a/gnu/packages/gl.scm
+++ b/gnu/packages/gl.scm
@@ -21,11 +21,13 @@
 
 (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)
   #:use-module (guix build-system gnu)
   #:use-module (guix packages)
+  #:use-module (guix utils)
   #:use-module (gnu packages autotools)
   #:use-module (gnu packages bison)
   #:use-module (gnu packages flex)
@@ -37,6 +39,7 @@
   #: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 +162,18 @@ Polygon meshes, and Extruded polygon meshes")
 also known as DXTn or DXTC) for Mesa.")
     (license l:expat)))
 
+(define libva-no-mesa
+  (package
+    (inherit libva)
+    (name "libva-no-mesa")
+    (inputs (alist-delete "mesa" (package-inputs libva)))
+    (arguments
+     (strip-keyword-arguments
+      '(#:make-flags)
+      (substitute-keyword-arguments (package-arguments libva)
+        ((#:configure-flags flags)
+         '(list "--disable-glx" "--disable-egl")))))))
+
 (define-public mesa
   (package
     (name "mesa")
@@ -188,8 +203,7 @@ also known as DXTn or DXTC) for Mesa.")
         ("dri3proto" ,dri3proto)
         ("presentproto" ,presentproto)
         ("expat" ,expat)
-        ;; TODO: Solve circular dependency with libva.
-        ;; ("libva" ,libva)
+        ("libva" ,libva-no-mesa)
         ("libxml2" ,libxml2)
         ;; TODO: Add 'libxml2-python' for OpenGL ES 1.1 and 2.0 support
         ("libxvmc" ,libxvmc)
-- 
2.2.1