GCC 3.4.3 is upon us!

rhill · Posted: Tue Dec 07, 2004 2:10 am Post subject:

same thing happened to me. after realizing i had just built from stage one with hardened gcc, i just decided to wipe it all and start again from stage 3. took the same amount of time to recompile everything anyways =/, and this time everything is a lot less flakey.

i'm starting to agree that stage three is the way to go. i don't think i've done a stage one or stage two yet that hasn't bombed out or fell apart for one reason or another. (although to be fair, i like to fiddle with things a lot so in most cases it's probably been my own fault :wink:

)

yodermk · Posted: Sat Dec 11, 2004 4:30 pm Post subject:

Just jumping in here.... I'm trying to build Rimfaxe Web Server, written using gcj, on 3.4.3-r1. It says it requires 3.3, though I'm hoping that's a minimal version (a list message from January says it works with 3.4 CVS). Am getting this error:

Jengu · Guru Joined: 28 Oct 2004 Posts: 384

I want to try GCC 3.4 since my XP3000+ desktop has spoiled me and my P3 700mhz laptop seems so slow.

These would be the correct steps for setting up gcc 3.4 yes?

Rafal_Glazar · Posted: Tue Dec 14, 2004 7:58 am Post subject:

Cintra · Advocate Joined: 03 Apr 2004 Posts: 2111 Location: Norway

[quote="Rafal_Glazar"]

Rafal_Glazar · Posted: Tue Dec 14, 2004 5:54 pm Post subject:

Cintra · Advocate Joined: 03 Apr 2004 Posts: 2111 Location: Norway

Thanks Rafal_Glazar

Now I understand :-)

mvh
_________________
"I am not bound to please thee with my answers" W.S.

Jengu · Guru Joined: 28 Oct 2004 Posts: 384

Would all of these cflags be safe for me to use with 3.4? I think that they are based on the thread but want to double check before I recompile everything and find a horribly unstable system

(I have a P3 Coppermine)

geki · Posted: Tue Dec 14, 2004 10:07 pm Post subject:

-fprefetch-loop-arrays does longer compile time and unstable system here on my pentium4.

USE="mxx mmx2 sse sse2" is ok. adding kind of these to CFLAGS can break things... seen often enough

Jengu · Guru Joined: 28 Oct 2004 Posts: 384

geki · Posted: Tue Dec 14, 2004 11:32 pm Post subject:

i use p4!

irf2003 · Veteran Joined: 10 Sep 2003 Posts: 1078

Jengu,
take out all the mmx sse stuff from your USE flags, also
don't use these with your cflags, be wary of the -fpmath,
and you should be ok
cannot vouche for "-fprefetch-loop-arrays", but, that's plenty
of optimizations as a whole.
i can vouche for the compiler flags below, on a pentium3 and a pentium4 (change march mtune to pentium3 or 4), minus any sse or mmx USE flags.

geki · Posted: Wed Dec 15, 2004 12:38 am Post subject:

i saw USE="mmx2" with mplayer ^^ used it and all fine still hehe

@ irf2003 what you mean with notes? :oops:

irf2003 · Veteran Joined: 10 Sep 2003 Posts: 1078

geki · Posted: Wed Dec 15, 2004 12:42 am Post subject:

there you are: ^^

geki · Posted: Wed Dec 15, 2004 12:45 am Post subject:

well, please, explain me what you see with these emerge info's

I am lost today ... headless

irf2003 · Veteran Joined: 10 Sep 2003 Posts: 1078

@geki,
i see you are getting away with those mmx and sse USE flags,
i gave up on them a long time ago, as i got so many problems
with these, and took them out of my USE flags and never tired again.
the reason i wanted to compare notes is because we more or less
have the same setup.
however, i would still not dare to have those mmx and sse in my
USE flags, can you convince me otherwise??
TIA
happy gentooing

geki · Posted: Wed Dec 15, 2004 1:05 am Post subject:

there were some progs erroring out on mmx specific code. like mplayer does. but that is not because of mmx USE-Flags or mmx specific. that are some other compiler flags that do these errors. with the flags i use it should not happen. or they are dropped by the ebuilds.

have a look at: (mplayer)
https://bugs.gentoo.org/show_bug.cgi?id=67903

irf2003 · Veteran Joined: 10 Sep 2003 Posts: 1078

geki · Posted: Wed Dec 15, 2004 1:19 am Post subject:

if you drop -fstack-protector and -fforce-addr mplayer compiles with mmx/sse specifics

doesn't matter what other flags you use...

irf2003 · Veteran Joined: 10 Sep 2003 Posts: 1078

geki · Posted: Wed Dec 15, 2004 1:46 am Post subject:

Jengu · Guru Joined: 28 Oct 2004 Posts: 384

I have used the sse and mmx use flags succesfully on all the packages I have installed that actually use them. The major ones are xine, imlib2, eterm, and xorg. My system is completely stable with them.

I'm using irf's cflags and gcc 3.4 to recompile my whole system right now =) Seeing as my cflags before just had -pipe, march, and fomit-frame-pointer, and with gcc 3.4, I expect to see a pretty big speed improvement.

The 512MB of PC133 (have 256MB PC100 right now) coming in the mail should help too =)

Update: My first emerge -e system is done

Jengu · Guru Joined: 28 Oct 2004 Posts: 384

Both emerge systems are done and the first emerge world is going on in the background. Gaim segfaults a few seconds after I open it -- could this be due to the emerge's not finishing yet or am I going to have to recompile it after all this is done?

Edit: Specifically, whenever I send or a receive a message gaim segfaults.

irf2003 · Veteran Joined: 10 Sep 2003 Posts: 1078