gnu: vulkan: Add spirv-headers.

* gnu/packages/vulkan.scm: Create file.
(spirv-headers): New variable.
* gnu/local.mk: Add vulkan.scm.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

gnu/local.mk

@@ -418,6 +418,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/vim.scm				\
   %D%/packages/virtualization.scm		\
   %D%/packages/vpn.scm				\
+  %D%/packages/vulkan.scm			\
   %D%/packages/w3m.scm				\
   %D%/packages/wdiff.scm			\
   %D%/packages/web.scm				\

gnu/packages/vulkan.scm

@@ -0,0 +1,65 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 Rutger Helling <rhelling@mykolab.com>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages vulkan)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system cmake)
+  #:use-module (gnu packages))
+
+(define-public spirv-headers
+  (let ((commit "98b01515724c428d0f0a5d01deffcce0f5f5e61c")
+        (revision "1"))
+    (package
+      (name "spirv-headers")
+      (version (string-append "0.0-" revision "." (string-take commit 9)))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/KhronosGroup/SPIRV-Headers")
+               (commit commit)))
+         (sha256
+          (base32
+           "15bknwkv3xwmjs3lmkp282a1wrp0da1b4lp45i4yiav04zmqygj2"))
+         (file-name (string-append name "-" version "-checkout"))))
+      (build-system cmake-build-system)
+      (arguments
+       `(#:tests? #f ;; No tests
+         #:phases (modify-phases %standard-phases
+                    (replace 'install
+                      (lambda* (#:key outputs #:allow-other-keys)
+                        (zero? (system* "cmake" "-E" "copy_directory"
+                                        "../source/include/spirv"
+                                        (string-append (assoc-ref outputs "out")
+                                                       "/include/spirv"))))))))
+      (home-page "https://github.com/KhronosGroup/SPIRV-Headers")
+      (synopsis "Machine-readable files from the SPIR-V Registry")
+      (description
+       "SPIRV-Headers is a repository containing machine-readable files from
+the SPIR-V Registry.  This includes:
+@itemize
+@item Header files for various languages.
+@item JSON files describing the grammar for the SPIR-V core instruction set,
+and for the GLSL.std.450 extended instruction set.
+@item The XML registry file.
+@end itemize\n")
+      (license (license:x11-style
+                (string-append "https://github.com/KhronosGroup/SPIRV-Headers/blob/"
+                               commit "/LICENSE"))))))