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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Fis Trivial <ybbs.daans@hotmail.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 opencl)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system cmake)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module (guix packages)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (gnu packages python))

;; This file adds OpenCL implementation related packages. Due to the fact that
;; OpenCL devices are not available during build (store environment), tests are
;; all disabled.
;; Check https://lists.gnu.org/archive/html/guix-devel/2018-04/msg00293.html

(define (make-opencl-headers major-version subversion)
  (let ((commit "e986688daf750633898dfd3994e14a9e618f2aa5")
        (revision "0"))
    (package
      (name "opencl-headers")
      (version (git-version
                (string-append major-version "." subversion ".0")
                revision commit))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://github.com/KhronosGroup/OpenCL-Headers.git")
                      (commit commit)))
                (file-name (string-append name "-" commit))
                (sha256
                 (base32
                  "176ydpbyws5nr4av6hf8p41pkhc0rc4m4vrah9w6gp2fw2i32838"))))
      (build-system gnu-build-system)
      (arguments
       `(#:phases
         (modify-phases %standard-phases
           (delete 'configure)
           (delete 'build)
           (delete 'check)
           (replace 'install
             (lambda* (#:key outputs #:allow-other-keys)
               (copy-recursively (string-append "./opencl" (string-append
                                                            ,major-version
                                                            ,subversion) "/CL")
                                 (string-append
                                  (assoc-ref outputs "out")
                                  "/include/CL")))))))
      (synopsis "The Khronos OpenCL headers")
      (description
       "This package provides the C headers by Khronos for OpenCL
programming.")
      (home-page "https://www.khronos.org/registry/OpenCL/")
      (license license:expat))))

(define-public opencl-headers-2.2
  (make-opencl-headers "2" "2"))
(define-public opencl-headers-2.1
  (make-opencl-headers "2" "1"))
(define-public opencl-headers-2.0
  (make-opencl-headers "2" "0"))
(define-public opencl-headers-1.2
  (make-opencl-headers "1" "2"))
(define-public opencl-headers-1.1
  (make-opencl-headers "1" "1"))
(define-public opencl-headers-1.0
  (make-opencl-headers "1" "0"))

(define-public opencl-headers opencl-headers-2.2)

(define-public opencl-clhpp
  (package
    (name "opencl-clhpp")
    (version "2.0.10")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://github.com/KhronosGroup/OpenCL-CLHPP/archive/v"
                    version ".tar.gz"))
              (sha256
               (base32
                "0awg6yznbz3h285kmnd47fykx2qa34a07sr4x1657yn3jmi4a9zs"))
              (file-name (string-append name "-" version ".tar.gz"))))
    (native-inputs
     `(("python" ,python-wrapper)))
    (propagated-inputs
     `(("opencl-headers" ,opencl-headers)))
    (arguments
     `(#:configure-flags
       (let ((out (assoc-ref %outputs "out")))
         (list
          "-DBUILD_EXAMPLES=OFF"
          "-DBUILD_TESTS=OFF"
          (string-append "-DCMAKE_INSTALL_PREFIX="
                         (assoc-ref %outputs "out")
                         "/include")))
       ;; regression tests requires a lot more dependencies
       #:tests? #f))
    (build-system cmake-build-system)
    (home-page "http://github.khronos.org/OpenCL-CLHPP/")
    (synopsis "Khronos OpenCL-CLHPP")
    (description
     "This package provides the @dfn{host API} C++ headers for OpenCL.")
    (license license:expat)))