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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 Tobias Geerinckx-Rice <me@tobias.gr>
+;;;
+;;; 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 digest)
+ #:use-module ((guix licenses) #:prefix license:)
+ #:use-module (guix packages)
+ #:use-module (guix download)
+ #:use-module (guix build-system gnu))
+
+(define-public xxhash
+ (package
+ (name "xxhash")
+ (version "0.6.4")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append "https://github.com/Cyan4973/xxHash/archive/v"
+ version ".tar.gz"))
+ (file-name (string-append name "-" version ".tar.gz"))
+ (sha256
+ (base32 "08nv9h3jzg6y85ysy2dj3qvvfsdz0rwkk497a2366syz278wqw25"))))
+ (build-system gnu-build-system)
+ (arguments
+ `(#:make-flags
+ (list "CC=gcc"
+ "XXH_FORCE_MEMORY_ACCESS=1" ; improved performance with GCC
+ (string-append "prefix=" (assoc-ref %outputs "out")))
+ #:test-target "test"
+ #:phases
+ (modify-phases %standard-phases
+ (delete 'configure)))) ; no configure script
+ (home-page "https://cyan4973.github.io/xxHash/")
+ (synopsis "Extremely fast hash algorithm")
+ (description
+ "xxHash is an extremely fast non-cryptographic hash algorithm. It works
+at speeds close to RAM limits, and comes in both 32- and 64-bit flavours.
+The code is highly portable, and hashes of the same length are identical on all
+platforms (both big and little endian).")
+ (license (list license:bsd-2 ; xxhash library (xxhash.[ch])
+ license:gpl2+)))) ; xxhsum.c