[oe] [meta-qt5] why does Qt5 build with ARM_INSTRUCTION_SET = "arm"

[Martin Jansa]

On Mon, Feb 17, 2014 at 04:46:23PM -0500, Denys Dmytriyenko wrote:
> On Mon, Feb 17, 2014 at 02:27:51PM -0700, Nicolas Dechesne wrote:
> > hi,
> > 
> > does anybody know why in Qt5/qtbase.inc, we have:
> > 
> > ARM_INSTRUCTION_SET = "arm"
> > 
> > Could it be an a low hanging fruit from the past? e.g. before
> > https://bugreports.qt-project.org/browse/QTBUG-16402 or
> > https://qt.gitorious.org/qt/qtbase/commit/a3bd9d4c0f3d9e80dbe35bd88649b245dca5f410?
> 
> Hmm, I would assume that's here from 4.8 days, although I haven't tried 
> dropping that line for latest Qt5... Would make sense to do some more testing.
> 
> 
> > as a matter of fact, for our project Qt5 (and QtWebkit) are building
> > (and working fine) when built with Thumb2, outside of OE. Also using
> > ARM instruction set instead of Thumb2 enforces Webkit to use the ARM
> > version of the javascript JIT, while the Thumb2 JIT engine seems to
> > work a lot better in our testing...
> 
> Seems like worth the effort to re-test the need for that setting. Unless 
> someone else has tried it already and found out the issue is still there

IIRC it was failing to build for armv4t (at least with 5.0.0) if someone
tests that armv4t builds with 5.2.*, I'll accept the patch.

Cheers,
-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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