[Bug 664431] [NEW] QT on armel is built with NEON by default

[Oliver Grawert]

Public bug reported:

On the armel platform in maveirck we guarantee that no NEON support is
hard built in by default into any libs, since we support HW in this
release that is not capable of using NEON instructions.

On supported HW like marvell dove (or on the unsupported nvidia tegra2),
QT applications all die with SIGILL.

Examining the build scripts (mainly configure) reveals that QT does
build time detection for NEON capabilities. Since our buildds are NEON
capable (but not all our target architectures) the configure options
need to be adjusted to not do the build time NEON detection by default.

For maverick the -no-neon option needs to be handed through to configure
from debian/rules. For natty and later releases runtime detection based
on hwcaps needs to be implemented in QT.

** Affects: qt4-x11 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: qt4-x11 (Ubuntu Maverick)
     Importance: High
         Status: New

** Affects: qt4-x11 (Ubuntu Natty)
     Importance: Undecided
         Status: New


** Tags: armel

** Also affects: qt4-x11 (Ubuntu Maverick)
   Importance: Undecided
       Status: New

** Also affects: qt4-x11 (Ubuntu Natty)
   Importance: Undecided
       Status: New

** Changed in: qt4-x11 (Ubuntu Maverick)
    Milestone: None => maverick-updates

** Tags added: armel

** Changed in: qt4-x11 (Ubuntu Maverick)
   Importance: Undecided => High

-- 
QT on armel is built with NEON by default
https://bugs.launchpad.net/bugs/664431
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