make.conf

[lumiwa]

Hi!

My make.conf looks:
CPUTYPE=pentium4
# added by use.perl 2008-03-01 15:21:02
PERL_VER=5.8.8
PERL_VERSION=5.8.8
.if ${.CURDIR:M*/ports/editors/openoffice.org-3}
WITH_KDE= yes
.endif

I red in the forum that for gcc 4 (FreeBSD 7) it doesn't need CPUTYPE but put
"-march=auto" in.. Is it -march=auto line in make.conf like
...
WITH_KDE= yes
.endif
...
-march=auto

And in Dru Lavigne book BSD Hacks I red about CFLAGS -O2 -pipe -funroll-loops and I tried to build one application and was much faster tha without but I am not sure if I could make a mess with this option.

Thanks in advance.