On Thursday 09 January 2003 22:19, James Moss wrote:
> I won't argue the -Ox stuff, but I don't suppose you had a conversation
> with Zack Winberg about why in moving from gcc-2.95 to gcc-3 they
> deprecated '-mpentiumpro'?
because in the new system this is ambigious ... do you want -march or do you 
want -mcpu ?

> Also, the manpage lists -march=pentiumpro
> and -mcpu=pentiumpro as aliases, but whenever I've spoken to anyone
> there always seems to be a distinct favortism toward -march... are they
> not truly the same?
nope !
http://gcc.gnu.org/onlinedocs/gcc-3.2/gcc/i386-and-x86-64-Options.html#i386%20and%20x86-64%20Options

<snip>
-mcpu=cpu-type 
Tune to cpu-type everything applicable about the generated code, except for 
the ABI and the set of available instructions

-march=cpu-type 
Generate instructions for the machine type cpu-type.
</snip>

-mike


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