'qmake' examples fail for freshly installed Qt-5.7

staeng

Hello experts.

I installed a fresh Qt-5.7 version and I am trying to setup a basic hello world project using qmake following the Qt qmake tutorial. After I manually create the project file

//hello.pro
HEADERS += hello.h
SOURCES += hello.cpp
SOURCES += main.cpp

and run 'qmake -o Makefile hello.pro' I get the follow output:
> qmake -o Makefile hello.pro
The system cannot find the path specified.
The system cannot find the path specified.
The system cannot find the path specified.

However all necessary files are created (Makefile, Makefile.Debug, Makefile.Release as well as empty debug and release folders). Running make returns

> make
mingw32-make -f Makefile.Release
mingw32-make[1]: Entering directory 'C:/Qt/Qt5.7.0/Examples/Qt-5.7/qmake/tutorial'
g++ -c -pipe -fno-keep-inline-dllexport -O2 -std=gnu++11 -frtti -Wall -Wextra -fexceptions -mthreads -DUNICODE -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I. -I../../../../5.7/mingw53_32/include -I../../../../5.7/mingw53_32/include/QtGui -I../../../../5.7/mingw53_32/include/QtANGLE -I../../../../5.7/mingw53_32/include/QtCore -Irelease -I../../../../5.7/mingw53_32/mkspecs/win32-g++ -o release/hello.o hello.cpp
In file included from hello.cpp:52:0:
hello.h:51:23: fatal error: QPushButton: No such file or directory
compilation terminated.
Makefile.Release:172: recipe for target 'release/hello.o' failed
mingw32-make[1]: *** [release/hello.o] Error 1
mingw32-make[1]: Leaving directory 'C:/Qt/Qt5.7.0/Examples/Qt-5.7/qmake/tutorial'
Makefile:34: recipe for target 'release' failed
mingw32-make: *** [release] Error 2

My own attempts of creating a fresh project have all failed, so help of any kind is greatly appreciated.

Cheers

SGaist

Hi and welcome to devnet,

You are missing QT += widgets in your .pro file.

The widgets have got their own modules in Qt 5.

staeng

Hi, thanks for the hint. I still get the missing path errors, however make now does compile successfully but the program crashes instantly (see screenshot). Some procedure entry point could not be located.. ? This seems like an odd error for a new Qt installation, maybe I should consider reinstalling it?

Or might I have done something wrong somewhere else? I installed Qt-5.7 for mingw 5.3 (which came with Qt inside the tools directory) and then added the mingw /bin and the Qt /bin paths to my PATH variable. Now I am using vim, make and qmake via a terminal. Is that okay so far?

SGaist

It's not odd. You're doing development from command line on Windows. Since you're learning Qt, use Qt Creator, That will save you lots of time and troubles. Windows is not the most command line friendly OS for development.

If you still want to use the command line for development, then you must add Qt's bin path to the PATH environment variable. Not from the tools folder but from the matching Qt/5.X/mingw_32. DON'T do that system wide, just for the console you're working in.

staeng

In fact, I started learning Qt a while ago (Qt4). I just switched to a new machine and thus needed to install Qt and I so chose to get the latest version. If it is at all possible I would like to keep using the command line since I have never had issues with qmake at all (hence my debugging skills are practically zero).

My PATH variable contains the paths for the Qt binaries and the mingw binaries, respectively.
C:\Qt\Qt5.7.0\5.7\mingw53_32\bin;
C:\Qt\Qt5.7.0\Tools\mingw530_32\bin;

And I reinstalled the whole thing, without effect. Is there anything obvious left to try?

SGaist

IIRC, you might have a shortcut in the start menu to open a pre-configured command line for Qt. That might be faster to get you running.