rest of the ix86 patch

[Jim Wilson]

	*BUT* this is not really correct since gcc cannot handle this

	%{!mcpu:%{!m486:%{!mpentium*: %(cpp_cpu_default)}}}

	correctly.  The problem is that gcc runs over the string a second
	time, adding __*__ to the defines.  But it does so before the %(...) 
	expressions are expanded (at least this is how I explain me the
	output).

You fix this by using %[cpp_cpu_default] instead of %(cpp_cpu_default).
Using [] instead of () tells gcc that it should add underscores to any
preprocessor defines contained within.  I think this is enough to make
your patch work the way you want it to.

There are still some minor problems though.  First is that we get __FOO__ but
not __FOO.  Normally we get both.  Second is that we get FOO even when -ansi.
Normally we don't.  I'd been meaning to fix these problems but haven't had
time for it yet.  They shouldn't interfere with what you are doing though.

Jim