added avr gcc avrlibc dev environment. Its not worth doing this properly. It works this way

svn path=/nixpkgs/trunk/; revision=14095

pkgs/development/misc/avr-gcc-with-avr-libc/default.nix

@@ -0,0 +1,74 @@
+args:
+args.stdenv.mkDerivation {
+  name = "avr-gcc-libc";
+
+  srcBinutils = args.fetchurl {
+    url = ftp://ftp.gnu.org/gnu/binutils/binutils-2.17.tar.bz2;
+    sha256 = "0pm20n2l9ddgdpgzk3zhnbb8nbyb4rb2kvcw21pkd6iwybk3rhz2";
+  };
+
+  srcGCC = args.fetchurl {
+    url = ftp://ftp.gnu.org/gnu/gcc/gcc-4.1.2/gcc-core-4.1.2.tar.bz2;
+    sha256 = "07binc1hqlr0g387zrg5sp57i12yzd5ja2lgjb83bbh0h3gwbsbv";
+  };
+
+  srcAVRLibc = args.fetchurl {
+    url = http://www.very-clever.com/download/nongnu/avr-libc/avr-libc-1.4.5.tar.bz2;
+    sha256 = "058iv3vs6syy01pfkd5894xap9zakjx8ki1bpjdnihn6vk6fr80l";
+  };
+
+  buildInputs =(with args; []);
+
+  phases = "doAll";
+
+  # don't call any wired $buildInputs/nix-support/* scripts or such. This makes the build fail 
+  builder = args.writeTextFile {
+    name = "avrbinutilsgccavrlibc-builder-script";
+    text =  ''
+    PATH=${args.coreutils}/bin:${args.gnumake}/bin:${args.gcc}/bin:${args.gnutar}/bin:${args.bzip2}/bin:${args.gnugrep}/bin:${args.gnused}/bin:${args.gawk}/bin
+    # that's all a bit too hacky...!
+    for i in `cat ${args.gcc}/nix-support/propagated-user-env-packages`; do
+      echo adding $i
+      PATH=$PATH:$i/bin
+    done
+    mkdir -p "$out"
+    export > env-vars
+
+    # important, without this gcc won't find the binutils executables
+    PATH=$PATH:$out/bin
+
+    prefix=$out
+
+    tar jxf $srcBinutils
+      cd binutils-*/
+      mkdir obj-avr
+      cd obj-avr
+      ../configure --target=avr --prefix="$prefix" --disable-nls --prefix=$prefix
+      make $MAKE_FLAGS
+      make install
+
+    cd $TMP
+    tar jxf $srcGCC
+      cd gcc-*
+      mkdir obj-avr
+      cd obj-avr
+      ../configure --target=avr --prefix="$prefix" --disable-nls --enable-languages=c --disable-libssp
+      make $MAKE_FLAGS
+      make install
+
+    cd $TMP
+      tar jxf $srcAVRLibc
+      cd avr-libc-*
+      ./configure --prefix="$prefix" --build=`./config.guess` --host=avr
+      make $MAKE_FLAGS
+      make install
+    '';
+  };
+
+  meta = { 
+      description = "avr gcc developement environment including binutils, avr-gcc and avr-libc";
+      # I've tried compiling the packages separately.. too much hassle. This just works. Fine.
+      license =  ["GPL" "LGPL"]; # see single packages ..
+      homepage = []; # dito
+  };
+}

pkgs/top-level/all-packages.nix

@@ -2143,6 +2143,11 @@ let
 
   ### DEVELOPMENT / MISC
 
+  avrgcclibc = import ../development/misc/avr-gcc-with-avr-libc {
+    inherit fetchurl stdenv writeTextFile gnumake coreutils gnutar bzip2
+      gnugrep gnused gawk;
+    inherit gcc;
+  };
 
   /*
   toolbus = import ../development/interpreters/toolbus {