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mapr
n00b
Joined: 05 Dec 2002
Posts: 22
Location: Germany
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 Posted: Tue May 20, 2003 6:52 am Post subject: pentium4 optimization |
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Hi,
I just wanted to install another Gentoo on a P4 system when I recognized the warning of optimization for Pentium4 - because it is a gcc failure why does it affect the Gentoo 1.4 only ?? I have a Gentoo 1.2 (as far as I remember) with gcc 3.2.1 and CFLAGS="-march=pentium4 -O3 -pipe" on a system which runs fairly well ... Would it be reasonable to turn to Gentoo 1.2 if I definitely want P4 optimization ??
Thanks in advance
Mario |
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bsolar
Bodhisattva
Joined: 12 Jan 2003
Posts: 2764
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| Posted: Tue May 20, 2003 7:03 am Post subject: |
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The problem is gcc related, the version fo Gentoo (or any other distro) doesn't matter. Also it affects only SSE2 instructions so it might get unnoticed.
You might try
| Code: | | python -c 'int(10.1); int(10000.3); int(1.2)' |
to see if the issue affects your system. If you get an overflow, it does.
You should check this thread about the problem. I also heard that the issue is solved with gcc-3.2.3 and above but I haven't tested it yet.
Please followups about the issue to the mentioned thread. 
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