anchor.diff:  
     LIBRARY_PATH = optionals (targetPlatform == hostPlatform) (makeLibraryPath ([]
       ++ optional (zlib != null) zlib
  -    ++ optional langJava boehmgc
  -    ++ optionals javaAwtGtk xlibs
  -    ++ optionals javaAwtGtk [ gmp mpfr ]
       ++ optional (libpthread != null) libpthread)
     );
   
  
positive.code: 
      longDescription = ''
        The GNU Compiler Collection includes compiler front ends for C, C++,
        Objective-C, Fortran, OpenMP for C/C++/Fortran, Java, and Ada, as well
        as libraries for these languages (libstdc++, libgcj, libgomp,...).
  
        GCC development is a part of the GNU Project, aiming to improve the
        compiler used in the GNU system including the GNU/Linux variant.
  
negative.code: 
      # Optional features
      optional (isl != null) "--with-isl=${isl}" ++
  
      platformFlags ++
      optional (targetPlatform != hostPlatform) crossConfigureFlags ++
  