[cmake-developers] Qt 4 and 5 on the same system - qmake binary name priority

[Clinton Stimpson]

Its not as simple as changing the order.
If I have my own build of Qt4, and if FindQt4.cmake had this:
find_program(QT_QMAKE_EXECUTABLE NAMES qmake4 qmake-qt4 qmake-mac qmake ...)
and I try to use my build of Qt
CMAKE_PREFIX_PATH=/home/me/qt/qt-4.7.2 cmake ../
It finds /usr/bin/qmake-qt4 instead, because it searched for qmake-qt4 in all 
possible paths before searching for qmake.

Currently, I think we need to keep "qmake" first.

The proposed patch does improve the situation by making a separate 
find_program() call for each executable name.  It also verifies the results of 
each find_program().

Clint

On Friday, March 08, 2013 02:35:53 PM Marcus D. Hanwell wrote:
> Hi,
> 
> I notice that Arch has already patched this, but CMake master as of
> aa027af9 still finds /usr/bin/qmake when a /usr/bin/qmake-qt4 is
> available. This bug is reported here,
> 
> http://public.kitware.com/Bug/view.php?id=13985
> 
> Is there any issue with changing the order so that if qmake-qt4 is
> found that is used preferentially over qmake which it seems will tend
> to be the Qt 5 qmake? Stephen mentions qtchooser but it isn't clear
> how relevant that is to making the find module prefer a qt4 specific
> suffix if one is found. I didn't look at the proposed patch that
> closely, but would like to understand any constraints on changing the
> binary name search order before proposing anything.
> 
> Thanks,
> 
> Marcus
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-- 
Clinton Stimpson
Elemental Technologies, Inc
Computational Simulation Software, LLC
www.csimsoft.com