egcs-1.2 stuff

[craig@jcb-sc.com]

>1. Because we're not going to solve the SCmode problems on 64-bit
>   targets in time for 1.2, it would be useful to restrict the 
>   "-femulate-complex" default option that the FF applies to only those 
>   cases where it is actually needed (single precision complex on 64-bit 
>   targets).

Hmm, might not be trivial in the code, and certainly would be more
painful to document than the current, fairly simple-minded option.
(Plus, we'd really need a new option to represent this intermediate
sort of emulation.)  Otherwise, that seems like a good idea.

>2. It might be best to enable -fno-strict-aliasing by default from
>   the Fortran Frontend, because Fortran knows of no type based
>   aliasing rules.

I still haven't examined the -fstrict-aliasing stuff at all yet,
though it's in my backlog somewhere (under "performance", I think).

        tq vm, (burley)