From: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
To: openembedded-devel@lists.openembedded.org
Subject: Re: Qt and detecting iWMMXT
Date: Sat, 25 Sep 2010 16:21:36 +0200 [thread overview]
Message-ID: <lyzkv5ewen.fsf@ensc-virt.intern.sigma-chemnitz.de> (raw)
In-Reply-To: <4C9D1136.2070507@freyther.de> (Holger Freyther's message of "Sat, 25 Sep 2010 04:59:34 +0800")
Holger Freyther <holger+oe@freyther.de> writes:
> when building for XScale one could pass -iwmmxt to the configure
> script.
I would avoid -march=iwmmxt because
a) there seems to be kernel bug which does not restore IWMMXT state on
ELF loading[1]
b) gcc 4.4.4 is bugged for this architecture (both ICE and generation of
inefficent code) and fails e.g. to bootstrap itself or glibc
When you really need iwmmxt support, I recommend to add '.arch iwmmxt'
to (inline) assembler instead of using -march=iwmmxt.
Enrico
Footnotes:
[1] http://article.gmane.org/gmane.linux.ports.arm.general/11795
prev parent reply other threads:[~2010-09-25 14:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-24 20:59 Qt and detecting iWMMXT Holger Freyther
2010-09-24 21:06 ` Frans Meulenbroeks
2010-09-24 21:28 ` Holger Freyther
2010-09-24 22:11 ` Koen Kooi
2010-09-25 7:09 ` Frans Meulenbroeks
2010-09-25 8:18 ` Frans Meulenbroeks
2010-09-25 8:29 ` Eric Bénard
2010-09-25 14:21 ` Enrico Scholz [this message]
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