Cannot compile code against qt4
Hello, I'm running ArchLinux and recently installed Qt4 and Qt5. However, the tutorial that I'm going through requires Qt4.
Here is my code.
int main(int argc, char * argv)
QApplication app(argc, argv);
I then did the following:
[code]% qmake -project
And this is what I got:
[code]g++ -c -pipe -march=i686 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/lib/qt/mkspecs/linux-g++ -I. -I. -I/usr/include/qt -I/usr/include/qt/QtGui -I/usr/include/qt/QtCore -I. -o hello_world.o hello_world.cpp
hello_world.cpp:3:24: fatal error: QApplication: No such file or directory
Makefile:298: recipe for target 'hello_world.o' failed
make: *** [hello_world.o] Error 1[/code]
How do I point to the correct headers/libraries?
I got it! I used the tool qtchooser to run qmake so that when the Makefile is generated, it's generated with Qt4 in mind. The process was something like this:
[code]qmake -project && qtchooser -run-tool=qmake -qt=4 && make[/code]
Hi and welcome to devnet,
You should be able to go through the same tutorial using Qt 5 with some minor modifications like
@QT += widgets@
when using widgets in your application (the error you are currently getting using Qt 5's qmake)
In between, and since you found a solution (thanks for sharing by the way) please update the thread title prepending [solved] so other forum users may know a solution has been found :)