Howto compile a project with a custom widget.

Beginner

Saturday, April 12th 2008, 5:17pm

Hi,

I created a custom widget in designer and I'm now ready to use the widget in my other projects but I'm getting either compile issues or the program compiles but doesn't run due to the custom widget library.

I first used the custom widget without changing the .pro file and got the following error ;

Source code

>make
/usr/bin/qmake -unix -o Makefile currency.pro
g++  -o currency currency.o currxml.o main.o moc_currency.o    -L/usr/lib -lQtXml -L/usr/lib -pthread -pthread -lQtGui -L/usr/X11R6/lib -lpng -lSM -lICE -pthread -pthread -lXi -lXrender -lXrandr -lXfixes -lXcursor -lXinerama -lfreetype -lfontconfig -lXext -lX11 -lQtNetwork -pthread -pthread -lQtCore -lz -lm -pthread -lgthread-2.0 -lrt -lglib-2.0 -ldl -lpthread
currency.o: In function `Ui_Dialog::setupUi(QDialog*)':
currency.cpp:(.text._ZN9Ui_Dialog7setupUiEP7QDialog[Ui_Dialog::setupUi(QDialog*)]+0x750): undefined reference to `SelectDateWidget::SelectDateWidget(QWidget*)'
collect2: ld returned 1 exit status
make: *** [currency] Error 1

I then changed the .pro file and added :

	Source code
1	LIBS += -L/usr/lib/qt4/plugins/designer -lselectdatewidget

Now the compile goes ok but when I run the program I get the following message

	Source code
1 2	>./currency ./currency: error while loading shared libraries: libselectdatewidget.so: cannot open shared object file: No such file or directory

What do I need to change to use my new custom widget?

I'm running Qt4.3 on a linux box.

Regards,

Leo Paalvast

This post has been edited 1 times, last edit by "leoclog" (Apr 13th 2008, 8:17pm)

Messenger

Intermediate

Posts: 329

Location: Lt

2

Sunday, April 13th 2008, 11:16am

RE: Howto compile a project with a custom widget.

>>./currency: error while loading shared libraries: libselectdatewidget.so: cannot open shared object file: No such file or directory
To run application use
LD_LIBRARY_PATH=/-L/usr/lib/qt4/plugins/designer ./yourprogram
or
LD_LIBRARY_PATH=./ ./yourprogram (and ibselectdatewidget.so in application directory)
Take a look at scripts loading opera, openoffice (soffice), firefox etc.
See /etc/ld.so.conf ldconfig etc.

Maybe it is possible to create static selectdtewidget library. Then application with selectdtewidget will not need external library (so). See qmake CONFIG variable staticlib option.

Fighting fire with fire.

leoclog

Beginner

Posts: 5

3

Sunday, April 13th 2008, 8:16pm

RE: Howto compile a project with a custom widget.

Thanks again messenger, I used the CONFIG += staticlib option and it works fine now,

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