Only one bunch of people have ever moved Linux to a non gcc compiler.
Irrespective of stuff like makefiles its _very_ hard. I know, Im the nutter
who started Linux 8086, thankfully Alistair Riddoch took it over and is
even crazier.
Linux requires inline assembler, and compiler ways of specifying alignment
rules on a per struct field basis. It makes use of a whole pile of preprocessor
and other stuff that quite frankly is simply essential and not portable
across compilers.
> a) Can not use better-optimizing compilers from hardware vendors (like Compaq
> on Alpha systems or possibly SUN on SPARC)
They won't make much difference if any. All the kernel hot spots are hand
tuned. We in places tune the C to get the code we want out of gcc - things
like branch order
Alan
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