anchor.diff:  
   with import ../../../lib;
   
  -stdenv.mkDerivation {
  +stdenv.mkDerivation ({
     name = "gcc-4.1.2";
     builder = if langF77 then ./fortran.sh else  ./builder.sh;
     
  
positive.code: 
    passthru = { inherit langC langCC langF77; };
  
    buildInputs = [] ++ (if gmp != null then [gmp] else [])
  	++ (if mpfr != null then [mpfr] else []);
  
    meta = {
      homepage = "http://gcc.gnu.org/";
      license = "GPL/LGPL";
  
negative.code:     priority = "7";
    };
  }
  
  // (if gmp != null || mpfr != null then {
    buildInputs = []
      ++ (if gmp != null then [gmp] else [])
      ++ (if mpfr != null then [mpfr] else []);
  } else {}))
  