distro: Change the module name space to (gnu ...).

* distro: Rename to...
* gnu: ... this.  Update module names accordingly.
* Makefile.am: Adjust accordingly.
* po/POTFILES.in: Likewise.
* distro.scm: Search for files under /gnu/packages instead of
  /distro/packages.
* gnu/packages/base.scm (ld-wrapper-boot3): Likewise.

gnu/packages/libffi.scm

@@ -0,0 +1,73 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2012 Ludovic Courtès <ludo@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 libffi)
+  #:use-module (guix licenses)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix utils)
+  #:use-module (guix build-system gnu))
+
+(define-public libffi
+  (let ((post-install-phase
+         ;; Install headers in the right place.
+         '(lambda* (#:key outputs #:allow-other-keys)
+            (define out (assoc-ref outputs "out"))
+            (mkdir (string-append out "/include"))
+            (with-directory-excursion
+                (string-append out "/lib/libffi-3.0.9/include")
+              (for-each (lambda (h)
+                          (format #t "moving `~a' to includedir~%" h)
+                          (rename-file h (string-append out "/include/" h)))
+                        (scandir "."
+                                 (lambda (x)
+                                   (not (member x '("." ".."))))))))))
+   (package
+    (name "libffi")
+    (version "3.0.9")
+    (source (origin
+             (method url-fetch)
+             (uri
+              (string-append "ftp://sourceware.org/pub/libffi/"
+                             name "-" version ".tar.gz"))
+             (sha256
+              (base32
+               "0ln4jbpb6clcsdpb9niqk0frgx4k0xki96wiv067ig0q4cajb7aq"))))
+    (build-system gnu-build-system)
+    (arguments `(#:modules ((guix build utils) (guix build gnu-build-system)
+                            (ice-9 ftw) (srfi srfi-26))
+                 #:phases (alist-cons-after 'install 'post-install
+                                            ,post-install-phase
+                                            %standard-phases)))
+    (synopsis "libffi, a 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 <http://github.com/atgreen/libffi/blob/master/LICENSE>.
+    (license expat))))
+