builtin_constant_p

[Jeffrey A Law]

  In message < 199806300453.VAA17415@rtl.cygnus.com >you write:
  > I can only hope that people spend more time thinking about the design
  > of their language extensions in the future.
Can't argue with this.  IMHO, gcc has far too many language extensions
that are poorly designed, poorly implemented and of limited value.

Even those that were reasonably designed & implemented are overly
troublesome (asms come to mind).  

jeff