Re: default CPU target ix86 based ports

[Matthias Klose <doko@cs.tu-berlin.de>]

Nathanael Nerode writes:
> >Looking at config.gcc the TARGET_CPU_DEFAULT is
> >overwritten by the target_alias. Looking at i386.c:1038 the cpu string
> >(tuning) is set to the TARGET_DEFAULT, but the arch string remains at
> >i386. the correct way to tune for i686 and use insn for i486 seems to
> >be this one. do you agree?
> >
> >--- gcc/config/i386/i386.c~     2003-07-09 07:45:00.000000000 +0200
> >+++ gcc/config/i386/i386.c      2003-08-09 12:58:33.000000000 +0200
> >@@ -1038,9 +1038,9 @@
> >   if (!ix86_cpu_string && ix86_arch_string)
> >     ix86_cpu_string = ix86_arch_string;
> >   if (!ix86_cpu_string)
> >-    ix86_cpu_string = cpu_names [TARGET_CPU_DEFAULT];
> >+    ix86_cpu_string = cpu_names [TARGET_CPU_DEFAULT_pentiumpro];
> >   if (!ix86_arch_string)
> >-    ix86_arch_string = TARGET_64BIT ? "athlon-4" : "i386";
> >+    ix86_arch_string = TARGET_64BIT ? "athlon-4" : "i486";
> 
> I believe this should work.   A less invasive method would be nicer if 
> possible, but the support for it is probably missing from gcc 3.3. :-/

and it's missing from 3.4 as well.