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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Danny Milosavljevic <dannym@scratchpost.org>
+;;;
+;;; 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 pure)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix utils)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix gexp)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages llvm)
+  #:use-module (gnu packages multiprecision))
+
+(define-public pure
+  (package
+    (name "pure")
+    (version "0.67")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/agraef/pure-lang/releases/"
+                           "download/pure-" version "/"
+                           "pure-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1hlx5dx6n70rbg668yc97yj4jbnrv0dpfw3l9b0ffmcgr76f6ba4"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:make-flags (list (string-append "LDFLAGS=-Wl,-rpath="
+                                         (assoc-ref %outputs "out")
+                                         "/lib"))
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-llvm-lookup
+           (lambda _
+             (substitute* "configure"
+               (("-lLLVM-[$][{]llvm_version[}]")
+                "`$LLVMCONF --libs`"))
+             #t)))))
+    (inputs
+     `(("gmp" ,gmp)
+       ("llvm" ,llvm-3.5)
+       ("mpfr" ,mpfr)))
+    (home-page "https://agraef.github.io/pure-lang/")
+    (synopsis "Pure programming Language")
+    (description "@code{pure} is a programming language based on term
+rewriting.  It offers equational definitions with pattern matching,
+full symbolic rewriting capabilities, dynamic typing, eager and lazy
+evaluation, lexical closures, built-in list and matrix support and
+a C interface.")
+    (license license:gpl3+)))