;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2016 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2015, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Dennis Mungai <dmngaie@gmail.com>
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2017 Roel Janssen <roel@gnu.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 llvm)
  #:use-module (guix packages)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix download)
  #:use-module (guix utils)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system cmake)
  #:use-module (gnu packages)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages bootstrap)           ;glibc-dynamic-linker
  #:use-module (gnu packages compression)
  #:use-module (gnu packages libffi)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages python)
  #:use-module (gnu packages xml))

(define-public llvm
  (package
    (name "llvm")
    (version "3.8.1")
    (source
     (origin
      (method url-fetch)
      (uri (string-append "http://llvm.org/releases/"
                          version "/llvm-" version ".src.tar.xz"))
      (sha256
       (base32
        "1ybmnid4pw2hxn12ax5qa5kl1ldfns0njg8533y3mzslvd5cx0kf"))))
    (build-system cmake-build-system)
    (native-inputs
     `(("python" ,python-2) ;bytes->str conversion in clang>=3.7 needs python-2
       ("perl"   ,perl)))
    (inputs
     `(("libffi" ,libffi)))
    (propagated-inputs
     `(("zlib" ,zlib)))                 ;to use output from llvm-config
    (arguments
     `(#:configure-flags '("-DCMAKE_SKIP_BUILD_RPATH=FALSE"
                           "-DCMAKE_BUILD_WITH_INSTALL_RPATH=FALSE"
                           "-DBUILD_SHARED_LIBS:BOOL=TRUE"
                           "-DLLVM_ENABLE_FFI:BOOL=TRUE"
                           "-DLLVM_INSTALL_UTILS=ON") ; Needed for rustc.

       ;; Don't use '-g' during the build, to save space.
       #:build-type "Release"
       #:phases (modify-phases %standard-phases
                  (add-before 'build 'shared-lib-workaround
                    ;; Even with CMAKE_SKIP_BUILD_RPATH=FALSE, llvm-tblgen
                    ;; doesn't seem to get the correct rpath to be able to run
                    ;; from the build directory.  Set LD_LIBRARY_PATH as a
                    ;; workaround.
                    (lambda _
                      (setenv "LD_LIBRARY_PATH"
                              (string-append (getcwd) "/lib"))
                      #t)))))
    (home-page "http://www.llvm.org")
    (synopsis "Optimizing compiler infrastructure")
    (description
     "LLVM is a compiler infrastructure designed for compile-time, link-time,
runtime, and idle-time optimization of programs from arbitrary programming
languages.  It currently supports compilation of C and C++ programs, using
front-ends derived from GCC 4.0.1.  A new front-end for the C family of
languages is in development.  The compiler infrastructure includes mirror sets
of programming tools as well as libraries with equivalent functionality.")
    (license license:ncsa)))

(define-public llvm-with-rtti
  (package (inherit llvm)
    (name "llvm-with-rtti")
    (arguments
     (substitute-keyword-arguments (package-arguments llvm)
       ((#:configure-flags flags)
        `(append '("-DCMAKE_SKIP_BUILD_RPATH=FALSE"
                   "-DCMAKE_BUILD_WITH_INSTALL_RPATH=FALSE"
                   "-DLLVM_REQUIRES_RTTI=1")
                 ,flags))))))

(define (clang-runtime-from-llvm llvm hash)
  (package
    (name "clang-runtime")
    (version (package-version llvm))
    (source
     (origin
       (method url-fetch)
       (uri (string-append "http://llvm.org/releases/"
                           ve