avr: use new compilation infrastructure

Gets rid of:
  avrbinutils
  avrgcc

to replace with:
  pkgsCross.avr.buildPackages.binutils
  pkgsCross.avr.buildPackages.gcc

pkgs/development/misc/avr/binutils/default.nix

@@ -1,22 +0,0 @@
-{ stdenv, fetchurl }:
-
-let
-  version = "2.31.1";
-in
-stdenv.mkDerivation {
-  name = "avr-binutils-${version}";
-
-  src = fetchurl {
-    url = "mirror://gnu/binutils/binutils-${version}.tar.bz2";
-    sha256 = "1l34hn1zkmhr1wcrgf0d4z7r3najxnw3cx2y2fk7v55zjlk3ik7z";
-  };
-  configureFlags = [ "--target=avr" "--enable-languages=c,c++" ];
-
-  meta = with stdenv.lib; {
-    description = "the GNU Binutils for AVR microcontrollers";
-    homepage = http://www.gnu.org/software/binutils/;
-    license = licenses.gpl3Plus;
-    platforms = platforms.unix;
-    maintainers = with maintainers; [ mguentner ];
-  };
-}

pkgs/development/misc/avr/gcc/avrbinutils-path.patch

@@ -1,15 +0,0 @@
-diff --git a/gcc/gcc-ar.c b/gcc/gcc-ar.c
-index 838ebc2..3ac4ee7 100644
---- a/gcc/gcc-ar.c
-+++ b/gcc/gcc-ar.c
-@@ -118,8 +118,8 @@ setup_prefixes (const char *exec_path)
- 				dir_separator, NULL);
-   prefix_from_string (self_libexec_prefix, &target_path);
- 
--  /* Add path as a last resort.  */
--  prefix_from_env ("PATH", &path);
-+  /* Add path to avrbinutils.  */
-+  prefix_from_string ("@avrbinutils@/bin", &path);
- }
- 
- int 

pkgs/development/misc/avr/gcc/default.nix

@@ -1,60 +0,0 @@
-{ stdenv, fetchurl, gmp, mpfr, libmpc, zlib, avrbinutils, texinfo }:
-
-let
-  version = "8.2.0";
-in
-stdenv.mkDerivation {
-
-  name = "avr-gcc-${version}";
-  src = fetchurl {
-    url = "mirror://gcc/releases/gcc-${version}/gcc-${version}.tar.xz";
-    sha256 = "10007smilswiiv2ymazr3b6x2i933c0ycxrr529zh4r6p823qv0r";
-  };
-
-  patches = [
-    ./avrbinutils-path.patch
-  ];
-
-  # avrbinutils-path.patch introduces a reference to @avrbinutils@, substitute
-  # it now.
-  postPatch = ''
-    substituteInPlace gcc/gcc-ar.c --subst-var-by avrbinutils ${avrbinutils}
-  '';
-
-  buildInputs = [ gmp mpfr libmpc zlib avrbinutils ];
-
-  nativeBuildInputs = [ texinfo ];
-
-  hardeningDisable = [ "format" ];
-
-  stripDebugList= [ "bin" "libexec" ];
-
-  enableParallelBuilding = true;
-
-  configurePhase = ''
-    mkdir gcc-build
-    cd gcc-build
-    ../configure   \
-    --prefix=$out  \
-    --host=$CHOST  \
-    --build=$CHOST \
-    --target=avr   \
-    --with-as=${avrbinutils}/bin/avr-as \
-    --with-gnu-as  \
-    --with-gnu-ld  \
-    --with-ld=${avrbinutils}/bin/avr-ld \
-    --with-system-zlib \
-    --disable-install-libiberty \
-    --disable-nls \
-    --disable-libssp \
-    --with-dwarf2 \
-    --enable-languages=c,c++'';
-
-  meta = with stdenv.lib; {
-    description = "GNU Compiler Collection, version ${version} for AVR microcontrollers";
-    homepage = http://gcc.gnu.org;
-    license = licenses.gpl3Plus;
-    platforms = with platforms; linux ++ darwin;
-    maintainers = with maintainers; [ mguentner ];
-  };
-}

pkgs/development/misc/avr/libc/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, avrgcc, avrbinutils, automake, autoconf }:
+{ stdenv, fetchurl, automake, autoconf }:
 
 let
   version = "2.0.0";
@@ -11,18 +11,7 @@ stdenv.mkDerivation {
     sha256 = "15svr2fx8j6prql2il2fc0ppwlv50rpmyckaxx38d3gxxv97zpdj";
   };
 
-  buildInputs = [ avrgcc avrbinutils automake autoconf ];
-  configurePhase = ''
-    unset LD
-    unset AS
-    unset AR
-    unset CC
-    unset CXX
-    unset RANLIB
-    unset STRIP
-
-    ./configure --prefix=$out --build=$(./config.guess) --host=avr
-  '';
+  nativeBuildInputs = [ automake autoconf ];
 
   # Make sure we don't strip the libraries in lib/gcc/avr.
   stripDebugList= "bin";
@@ -32,7 +21,7 @@ stdenv.mkDerivation {
     description = "a C runtime library for AVR microcontrollers";
     homepage = http://savannah.nongnu.org/projects/avr-libc/;
     license = licenses.bsd3;
-    platforms = platforms.unix;
+    platforms = platforms.all;
     maintainers = with maintainers; [ mguentner ];
   };
 }