[cmake-developers] [CMake 0013985]: FindQt4 fails if Qt5 qmake is called qmake

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
====================================================================== 
http://public.kitware.com/Bug/view.php?id=13985 
====================================================================== 
Reported By:                Janne Rönkkö
Assigned To:                
====================================================================== 
Project:                    CMake
Issue ID:                   13985
Category:                   CMake
Reproducibility:            always
Severity:                   major
Priority:                   high
Status:                     new
====================================================================== 
Date Submitted:             2013-03-05 11:39 EST
Last Modified:              2013-03-05 11:39 EST
====================================================================== 
Summary:                    FindQt4 fails if Qt5 qmake is called qmake
Description: 
If Qt4 and Qt5 are installed so that qmake is qmake from Qt5 and qmake4 or
qmake-qt4 is from Qt4 the FindQt4 module does not find Qt4 but says it found
Qt5.

On Archlinux the qmake is currently from Qt5 and qmake-qt4 is the qmake from
Qt4.

The attached patch fixes the issue. I left out some strange find_program code
that should not be needed in reasonably configured system.

Steps to Reproduce: 
$ cat ../CMakeLists.txt 
cmake_minimum_required( VERSION 2.8 )

project( test )

find_package( Qt4 REQUIRED )
$ cmake ..
-- The C compiler identification is GNU 4.7.2
-- The CXX compiler identification is GNU 4.7.2
-- Check for working C compiler: /usr/lib/colorgcc/bin/cc
-- Check for working C compiler: /usr/lib/colorgcc/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/lib/colorgcc/bin/c++
-- Check for working CXX compiler: /usr/lib/colorgcc/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Looking for Q_WS_X11
-- Looking for Q_WS_X11 - not found
-- Looking for Q_WS_WIN
-- Looking for Q_WS_WIN - not found
-- Looking for Q_WS_QWS
-- Looking for Q_WS_QWS - not found
-- Looking for Q_WS_MAC
-- Looking for Q_WS_MAC - not found
CMake Error at /usr/share/cmake-2.8/Modules/FindQt4.cmake:1216 (message):
  Found unsuitable Qt version "5.0.1" from /usr/bin/qmake, this code requires
  Qt 4.x
Call Stack (most recent call first):
  CMakeLists.txt:5 (find_package)


-- Configuring incomplete, errors occurred!

====================================================================== 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2013-03-05 11:39 Janne Rönkkö   New Issue                                    
2013-03-05 11:39 Janne Rönkkö   File Added: 0001-Fix-FindQt4-module.patch     
              
======================================================================