Ok to build Linux distro /w -march=pentium4?

[Steve Snyder]

I update my installed version of RedHat Linux once a year, rebuilding the 
entire distro.  (The idea is to optimize specifically for my hardware 
environment.)  

I will soon be upgrading to RHL v9, the first new version since I got a 
Pentium4-based machine.  My question: is the Pentium4 support in GCC 
v3.2.2 stable enough to do this?

Thank you.