Undefined reference to my signal

[tomek]

Hi!
This is my first post so I'd like to say hello everyone!
I am trying to compile my simple project, but I get an error:

release\fetchThread.o(.text+0x387):fetchThread.cpp: undefined reference to `FetchThread::log(QString)'
release\fetchThread.o(.text+0x3ba):fetchThread.cpp: undefined reference to `FetchThread::connected()'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [release\project.exe] Error 1

release\fetchThread.o(.text+0x387):fetchThread.cpp: undefined reference to `FetchThread::log(QString)'
release\fetchThread.o(.text+0x3ba):fetchThread.cpp: undefined reference to `FetchThread::connected()'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [release\project.exe] Error 1

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FetchThread::log(QString) and FetchThread::connected(void) are my own signals defined in the appropriate header file.
Files:
PROJECT DIRECTORY
WRONG CPP
WRONG H
It complains about my signals emitted from the above CPP file.
Please help
Regards,
Tomek

[jacek]

It looks like make didn't run moc program on your fetchThread.h file. Run qmake (without any parameters) to generate new Makefiles and try compiling your project again.

[wysota]

Add HEADERS+=fetchThread.h to your .pro file.

[tomek]

Thank you! It works now.
First I added the HEADERS directive and then generated new Makefiles.
Happy New Year

[katrina]

I can't tell you how many times I have been banging my head on the desk asking myself "why isn't this compiling?!?" then realizing I need to run qmake again because I added another file to the project since last time I ran it.
(of course this is AFTER I go through all of the source code, like, 5 times lol)

Katrina

[sunil.thaha]

AFAIK. If you add a file then make calls qmake first. Only when u add Q_OBJECT to the class do we need to call the qmake manually.

[shad]

btw, there is a strange symbol (single quote) after "HEADERS" in the project file

[tomek]

I found the apostrophe too, happily quickly
I've been always executing `qmake && make` not to forget about the qmake.
Thanks for your posts!

[katrina]

Only when u add Q_OBJECT to the class do we need to call the qmake manually.

This is good to know, I have been trying to run it after I add any new file regardless of of it Q_OBJECT-ed-ness. (although I tend to implement signals and slots heavily(maybe too much so!), so 80% of my new code is a Q_OBJECT...still good info!!! Thanks!)

Katrina

[TheIndependentAquarius]

Missing Q_OBJECT in the class declaration also does lead to the same error: undefined reference to `MyThread::MySignal()'