NSBundle problems:

   It requires that the global variable NSArgv be defined and set to the
   value of argv in main() in order to find the executable location.
   (Actually objc-load requires this).

   Linking with different linkers and on different systems is different
   and may require some changes to the load flags, like -nostdlib,
   -shared, -Xlinker -r, etc... Some of this can be taken care of in 
   the configure script.