guix/gnu/packages/libffi.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; This file is part of GNU Guix.
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;;; under the terms of the GNU General Public License as published by
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;;; GNU General Public License for more details.
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(define-module (gnu packages libffi)
  #:use-module (gnu packages)
  #:use-module (guix licenses)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix build-system gnu))

(define-public libffi
  (let ((post-install-phase
         ;; Keep headers where libffi.pc expects them, but also make them
         ;; available in $includedir where some users expect them.
         '(lambda* (#:key outputs #:allow-other-keys)
            (define out (assoc-ref outputs "out"))
            (symlink (string-append out "/lib/libffi-3.2.1/include")
                     (string-append out "/include")))))
   (package
    (name "libffi")
    (version "3.2.1")
    (source (origin
             (method url-fetch)
             (uri
              (string-append "ftp://sourceware.org/pub/libffi/"
                             name "-" version ".tar.gz"))
             (sha256
              (base32
               "0dya49bnhianl0r65m65xndz6ls2jn1xngyn72gd28ls3n7bnvnh"))))
    (build-system gnu-build-system)
    (arguments `(#:phases (alist-cons-after 'install 'post-install
                                            ,post-install-phase
                                            %standard-phases)))
    (outputs '("out" "debug"))
    (synopsis "Foreign function call interface library")
    (description
     "The libffi library provides a portable, high level programming interface
to various calling conventions.  This allows a programmer to call any
function specified by a call interface description at run-time.

FFI stands for Foreign Function Interface.  A foreign function interface is
the popular name for the interface that allows code written in one language
to call code written in another language.  The libffi library really only
provides the lowest, machine dependent layer of a fully featured foreign
function interface.  A layer must exist above libffi that handles type
conversions for values passed between the two languages.")
    (home-page "http://sources.redhat.com/libffi/")

    ;; See <https://github.com/atgreen/libffi/blob/master/LICENSE>.
    (license expat))))