gnu: Add AVR-Libc.

* gnu/packages/avr.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add avr.scm.
* gnu/packages/cross-base.scm (xgcc-avr): New variable.
* gnu/packages/bootstrap.scm (glibc-dynamic-linker): Add case for
  "avr".

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu-system.am

@@ -40,6 +40,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/autogen.scm			\
   gnu/packages/autotools.scm			\
   gnu/packages/avahi.scm			\
+  gnu/packages/avr.scm				\
   gnu/packages/backup.scm			\
   gnu/packages/base.scm				\
   gnu/packages/bash.scm				\

gnu/packages/avr.scm

@@ -0,0 +1,51 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Manolis Fragkiskos Ragkousis <manolis837@gmail.com>
+;;;
+;;; 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 avr)
+  #:use-module (guix licenses)
+  #:use-module (guix download)
+  #:use-module (guix packages)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages cross-base))
+
+(define-public avr-libc
+  (package
+    (name "avr-libc")
+    (version "1.8.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "mirror://savannah//avr-libc/avr-libc-"
+                    version ".tar.bz2"))
+              (sha256
+               (base32
+                "0sd9qkvhmk9av4g1f8dsjwc309hf1g0731bhvicnjb3b3d42l1n3"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:out-of-source? #t
+       #:configure-flags '("--host=avr")))
+
+    (native-inputs `(("cross-binutils" ,(cross-binutils "avr"))
+                     ("cross-gcc" ,xgcc-avr)))
+    (home-page "http://www.nongnu.org/avr-libc/")
+    (synopsis "The AVR C Library")
+    (description
+     "AVR Libc is a project whose goal is to provide a high quality C library
+for use with GCC on Atmel AVR microcontrollers.")
+    (license (bsd-style "http://www.nongnu.org/avr-libc/LICENSE.txt"))))

gnu/packages/bootstrap.scm

@@ -162,6 +162,7 @@ check whether everything is alright."
         ;; XXX: This one is used bare-bones, without a libc, so add a case
         ;; here just so we can keep going.
         ((string=? system "xtensa-elf") "no-ld.so")
+        ((string=? system "avr") "no-ld.so")
 
         (else (error "dynamic linker name not known for this system"
                      system))))

gnu/packages/cross-base.scm

@@ -313,6 +313,12 @@ XBINUTILS and the cross tool chain."
                (cross-binutils triplet)
                (cross-libc triplet))))
 
+(define-public xgcc-avr
+  ;; AVR cross-compiler, used to build AVR-Libc.
+  (let ((triplet "avr"))
+    (cross-gcc triplet
+               (cross-binutils triplet))))
+
 (define-public xgcc-xtensa
   ;; Bare-bones Xtensa cross-compiler, used to build the Atheros firmware.
   (cross-gcc "xtensa-elf"))