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.

[graudeejs]

stick to defaults.... That's my advice....

all you can change safely is CPUTYPE

[Weaseal]

Generally what killasmurf says is true, but I have run with CFLAGS?=-O2 -pipe for years.

Check out http://gentoo-wiki.com/Safe_Cflags

[graudeejs]

Originally Posted by Weaseal

Generally what killasmurf says is true, but I have run with CFLAGS?=-O2 -pipe for years.

Check out http://gentoo-wiki.com/Safe_Cflags

flags
CFLAGS?=-O2 -pipe
are some (or all) of default flags.... that's why you didn't have problems....
you can remove that line and nothing will change in performance....


however if you want to speed up compilation, you could use ccache.....
Thing works great... when you compile same source for more than once....

[lumiwa]

Originally Posted by killasmurf86

flags
CFLAGS?=-O2 -pipe
are some (or all) of default flags.... that's why you didn't have problems....
you can remove that line and nothing will change in performance....


however if you want to speed up compilation, you could use ccache.....
Thing works great... when you compile same source for more than once....

If I put :
CFLAGS= -march=auto

than I don't need CPUTYPE=pentium4 ? Am I wrigth, please?

[graudeejs]

maybe, try it and post here... if you fail to compile, then put pentium4 back....
if you doubt if you have pentium4 or prescott (like i did) you can use sysutils/x86info utility to find out.

[vermaden]

Here you will find complete example of make.conf:
http://toya.net.pl/~vermaden/text/make.conf

[lumiwa]

Originally Posted by vermaden

Here you will find complete example of make.conf:
http://toya.net.pl/~vermaden/text/make.conf

Thank you.

BTW: -march=auto doesn't work (wrong switch):
cpu.c:1: error: bad value (auto) for -march= switch
cpu.c:1: error: bad value (auto) for -mtune= switch

and my processor is:

CPU Model: Pentium 4 (Northwood) [D1] Original OEM
Processor name string: Intel(R) Pentium(R) 4 CPU 2.60GHz

Mitja

[Carpetsmoker]

-march=auto got renamed to -march=native in GCC 4.1 or 4.2.

[phoenix]

Just stick to the processor family.

Don't try to be all "oooh, I'm super-leet" and try to be awesome with your optimisations. Especially if you don't understand the Mk system in FreeBSD, how it uses CPUTYPE and CFLAGS, what the defaults are (and why they are that way), what the available options are, and how each different value affects the rest.

Read the CPUTYPE section in /usr/share/examples/etc/make.conf, find the one that's closest to your CPU family, and let the Mk system handle the rest. There's a lot of "magic" in /usr/share/mk/bsd.cpu.mk that depends on you getting CPUTYPE at least close to right, and to automatically fill in the rest.

For you, CPUTYPE=p4 is all you need.