avr-*: split avr-gcc-libc into separate packages

- avr-gcc 5.3.0 -> 5.4.0

closes #28220

Since the packages do not share a common prefix anymore, you need
to define the current store paths in your project's Makefile.

Example for an atmega644 build:

CFLAGS += -I /nix/store/9rffxzds5crcpm76g3nr03jx0aa657cf-avr-libc-2.0.0/avr/include
CFLAGS += -B /nix/store/9rffxzds5crcpm76g3nr03jx0aa657cf-avr-libc-2.0.0/avr/lib/avr5
CFLAGS += -L /nix/store/9rffxzds5crcpm76g3nr03jx0aa657cf-avr-libc-2.0.0/avr/lib/avr5
CFLAGS += -L /nix/store/8409dj9js4i5901i63275wxdm783l0p6-avr-gcc-5.4.0/lib/gcc/avr/5.4.0/avr5

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

@@ -0,0 +1,22 @@
+{ stdenv, fetchurl }:
+
+let
+  version = "2.26";
+in
+stdenv.mkDerivation {
+  name = "avr-binutils-${version}";
+
+  src = fetchurl {
+    url = "mirror://gnu/binutils/binutils-${version}.tar.bz2";
+    sha256 = "1ngc2h3knhiw8s22l8y6afycfaxr5grviqy7mwvm4bsl14cf9b62";
+  };
+  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/default.nix

@@ -0,0 +1,50 @@
+{ stdenv, fetchurl, gmp, mpfr, libmpc, zlib, avrbinutils, texinfo }:
+
+let
+  version = "5.4.0";
+in
+stdenv.mkDerivation {
+
+  name = "avr-gcc-${version}";
+  src = fetchurl {
+    url = "mirror://gcc/releases/gcc-${version}/gcc-${version}.tar.bz2";
+    sha256 = "0fihlcy5hnksdxk0sn6bvgnyq8gfrgs8m794b1jxwd1dxinzg3b0";
+  };
+
+  buildInputs = [ gmp mpfr libmpc zlib avrbinutils ];
+
+  nativeBuildInputs = [ texinfo ];
+
+  hardeningDisable = [ "format" ];
+
+  stripDebugList= [ "bin" "libexec" ];
+
+  enableParallelBuilding = true;
+
+  configurePhase = ''
+    mkdir gcc-build
+    cd gcc-build
+    ../configure   \
+    --prefix=$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 = platforms.unix;
+    maintainers = with maintainers; [ mguentner ];
+  };
+}

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

@@ -0,0 +1,38 @@
+{ stdenv, fetchurl, avrgcc, avrbinutils, automake, autoconf }:
+
+let
+  version = "2.0.0";
+in
+stdenv.mkDerivation {
+  name = "avr-libc-${version}";
+
+  src = fetchurl {
+    url = http://download.savannah.gnu.org/releases/avr-libc/avr-libc-2.0.0.tar.bz2;
+    sha256 = "15svr2fx8j6prql2il2fc0ppwlv50rpmyckaxx38d3gxxv97zpdj";
+  };
+
+  buildInputs = [ avrgcc avrbinutils automake autoconf ];
+  configurePhase = ''
+    unset LD
+    unset AS
+    unset AR
+    unset CC
+    unset CXX
+    unset RANLIB
+    unset STRIP
+
+    ./configure --prefix=$out --build=$(./config.guess) --host=avr
+  '';
+
+  # Make sure we don't strip the libraries in lib/gcc/avr.
+  stripDebugList= "bin";
+  dontPatchELF = true;
+
+  meta = with stdenv.lib; {
+    description = "a C runtime library for AVR microcontrollers";
+    homepage = http://savannah.nongnu.org/projects/avr-libc/;
+    license = licenses.bsd3;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ mguentner ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -6587,7 +6587,13 @@ with pkgs;
     samples = true;
   };
 
-  avrgcclibc = callPackage ../development/misc/avr-gcc-with-avr-libc {};
+  avrgcclibc = throw "avrgcclibs are now separate packages, install avrbinutils, avrgcc and avrlibc";
+
+  avrbinutils = callPackage ../development/misc/avr/binutils {};
+
+  avrgcc      = callPackage ../development/misc/avr/gcc {};
+
+  avrlibc     = callPackage ../development/misc/avr/libc {};
 
   avr8burnomat = callPackage ../development/misc/avr8-burn-omat { };