set default rpath without using -specs?

[Jason Pepas]

Hi,

I need to set a default rpath as explained here:

   http://gcc.gnu.org/faq.html#rpath

However, rather than having to call "gcc -specs=foo", I would like make 
this the default behavior.

Back in the days of gcc 3.x, I would just edit the default specs file 
hand.  However, gcc 4.x has no default specs file (the defaults are 
built-in).

thanks,
jason pepas