[oe] [PATCH] Do not generate NEON code for qt-4.6.2 embedded on armv6

Khem Raj raj.khem at gmail.com
Tue Mar 16 01:50:29 UTC 2010

On Mon, Mar 15, 2010 at 5:36 PM, Holger Hans Peter Freyther
<holger+oe at freyther.de> wrote:
> On Monday 15 March 2010 18:04:04 Valentin Longchamp wrote:
>> http://bugreports.qt.nokia.com/browse/QTBUG-8749
>> Neon code is generated for armv6 processor, where it should be armv7 only.
>> This results in illegal instructions with some of the qt4 libraries.
>> The current solution is not optimal, I just needed a quick fix for my arch
>> and I don't have the needed knowledge in OE to fix it cleanly, but I wanted
>> to point this issue out. But at least other arch (armv5 and armv4) should
>> have the same problem and receive the same fix.
> Well... then maybe this should be fixed differently then?

probably disable neon by default in qt build system and only enable it
for  architectures that support
neon  will make it work better with default option set for older arms.
One could also ask compiler
at build time but then it would be autoconf like :)


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