[Bug 308814] Re: kde4bindings fails to build on ARM

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On 2008-12-02T12:14:58+00:00 Michael Casadevall wrote:

Version:            (using Devel)
Compiler:          GCC 4.3 ARM architecture
OS:                Linux
Installed from:    Compiled sources

On architectures where Qt doesn't define qreal to double but a float
(that is, architectures lacking a FPU, the ARM architecture, and Windows
CE), parts of KDE fail to build from source, such as kde4bindings due to
this mismatch since a few APIs return QList <double> vs QList <qreal>,
which then fail when other code (such as kde4bindings), tries to
QList<qreal> = *function call that returns QList <double>*

majorTickMarks() and minorTickMarks() are two functions (from
kplotaxis.h), that currently have this issue, but their may be others
that also do. Although the obvious fix would be to change the
QList<doubles> to QList<qreal>, this may be the wrong way to fix it
(there are cases where you want to return doubles for instance). I"ll
provide a patch once the proper fix is determined.

Reply at: https://bugs.launchpad.net/kdebindings/+bug/308814/comments/0

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On 2008-12-02T12:41:00+00:00 mumismo wrote:

moved to bindings

Reply at: https://bugs.launchpad.net/kdebindings/+bug/308814/comments/1

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On 2008-12-02T12:50:26+00:00 Michael Casadevall wrote:

I'm not moving this bug to bindings is appropriate; this is an issue
with kdelibs specifically, it just happens bindings has code that
triggers the build failure. kplotaxis is a QWidget derived widget; the
bug is occurring because its using double directly vs. qreal.

Alternatively, if it is a binding specific problem, then the bug is in
sip specifically since that's what generates the code, but as far as I
can tell, placing data elements from KPlotAxis into a QList<qreal> is
acceptable (aka, sip is generated proper code, it just happens that as
long as kplotaxis is using double specifically vs. qreal, it will break
on architectures that qreal != double).

Reply at: https://bugs.launchpad.net/kdebindings/+bug/308814/comments/2

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On 2008-12-22T11:04:55+00:00 Michael Casadevall wrote:

Created attachment 29543
Checks for PyQt_qreal_double ...

The main issue was caused by PyQt_qreal_double not being passed to sip
during the generation of python-kde4 C files. The following patch fixes
that, but the cmake code should probably be changed to use all the
options set forth by SIP (unless this is done like this for a reason).

Reply at: https://bugs.launchpad.net/kdebindings/+bug/308814/comments/9

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Title:
  kde4bindings fails to build on ARM

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