anchor.diff:      bison
       perl
       texinfo
  -  ] ++ (lib.optionals stdenv.targetPlatform.isiOS [
  +  ] ++ (lib.optionals targetPlatform.isiOS [
       autoreconfHook
  -  ]) ++ lib.optionals stdenv.targetPlatform.isVc4 [ flex ];
  +  ]) ++ lib.optionals targetPlatform.isVc4 [ flex ];
     buildInputs = [ zlib gettext ];
   
     inherit noSysDirs;
  
positive.code: 
    # As binutils takes part in the stdenv building, we don't want references
    # to the bootstrap-tools libgcc (as uses to happen on arm/mips)
    NIX_CFLAGS_COMPILE = if stdenv.hostPlatform.isDarwin
      then "-Wno-string-plus-int -Wno-deprecated-declarations"
      else "-static-libgcc";
  
  
negative.code:   '';
  
    # else fails with "./sanity.sh: line 36: $out/bin/size: not found"
    doInstallCheck = buildPlatform == hostPlatform && hostPlatform == targetPlatform;
  
    enableParallelBuilding = true;
  
  