error "variable set to NOTFOUND" in compiling a Qt project wtih CMake

Hello. In connection with a project I am working on, I found some related Qt-based code at https://code.google.com/p/cornucopia-lib/

So I cloned the hg repo, and did:

Code:

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mkdir build
cd build
cmake ..

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but I got the following errors:

Code:

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CMake Error: The following variables are used in this project, but
they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the
CMake files:
QT_QTSCRIPT_INCLUDE_DIR (ADVANCED)
   used as include directory in directory
/home/samjnaa/sr/_repos/hg/cornucopia-lib/DemoUI
QT_QTSVG_INCLUDE_DIR (ADVANCED)
   used as include directory in directory
/home/samjnaa/sr/_repos/hg/cornucopia-lib/DemoUI
   used as include directory in directory
/home/samjnaa/sr/_repos/hg/cornucopia-lib/Tools
-- Configuring incomplete, errors occurred!

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I wrote to the author about this but he was not sure what the problem was. So I hope someone here can indicate to me how I can fix these errors.

I am running Kubuntu Raring 64-bit with Qt 4.8.4 and CMake 2.8.10.

Thank you!

The CMake Qt find module uses the Qt4 qmake: is it in the PATH?

You could try this at the top of DemoUI/ CMakeLists.txt:

Code:

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# CmakeLists.txt in DemoUI
 
FIND_PACKAGE(Qt4 COMPONENTS QtSvg QtScript REQUIRED)
SET(QT_USE_QTSVG TRUE)
SET(QT_USE_QTSCRIPT TRUE)
INCLUDE(${QT_USE_FILE})
 
...

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Quote:

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Originally Posted by ChrisW67

The CMake Qt find module uses the Qt4 qmake: is it in the PATH?

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Yes it is.

Quote:

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You could try this at the top of DemoUI/ CMakeLists.txt:

Code:

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FIND_PACKAGE(Qt4 COMPONENTS QtSvg QtScript REQUIRED)

---

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Thank you very much! This worked to remove this particular error, but now I am getting the following error:

Code:

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Scanning dependencies of target DemoUI
[ 58%] Building CXX object DemoUI/CMakeFiles/DemoUI.dir/GroupSelWidget.cpp.o
In file included from /home/samjnaa/sr/_repos/hg/cornucopia-lib/DemoUI/GroupSelWidget.cpp:21:0:
/home/samjnaa/sr/_repos/hg/cornucopia-lib/DemoUI/GroupSelWidget.h:26:19: fatal error: QWidget: No such file or directory
 #include <QWidget>
                   ^
compilation terminated.
make[2]: *** [DemoUI/CMakeFiles/DemoUI.dir/GroupSelWidget.cpp.o] Error 1
make[1]: *** [DemoUI/CMakeFiles/DemoUI.dir/all] Error 2
make: *** [all] Error 2

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But I have the Qt headers installed (indeed I'm sure it would have complained earlier if I had not):

Code:

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$ dpkg -S QWidget
...
libqt4-dev: /usr/include/qt4/QtGui/QWidget
...

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I am guessing that some CMake command is pointing to the wrong include directory or something. (Or perhaps the code needs to use "QtGui/" as in #include <QtGui/QWidget> but I'd prefer to hack the CMakeLists.txt if possible.) Please tell me what correction I have to do to get *this* working now?

Code:

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//#include <QtGui/QWidget>
#include <QtWidgets/QtWidgets>

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No, the module name is not needed in the include (especially not the Qt5 one saman_artorious suggests).
Add QtGui and maybe QtCore to the COMPONENTS in your CMakeLists.txt

Quote:

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Originally Posted by ChrisW67

No, the module name is not needed in the include (especially not the Qt5 one saman_artorious suggests).
Add QtGui and maybe QtCore to the COMPONENTS in your CMakeLists.txt

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Hi thank you very much -- I definitely preferred to not touch the sources and your suggestion worked (yes I needed to include QtCore too -- apparently there was #include <QSet> in there). BTW presumably the authors' CMake script worked at the time of their upload -- any idea it does not work now?

The problem would appear to be a change in the behaviour of the CMake Qt4 find module, not Qt.