QT Hello world "make: Nothing to be done for `first'."

MaTrIx709 · 11-06-2006, 02:26 PM

Hi all,

I'm trying to compile the hello world program in my book and I get the following error:

Code:

make: Nothing to be done for `first'.

Here is my console output:

Code:

$ qmake -project && qmake hello.pro && make
make: Nothing to be done for `first'.
$

Here is my program

Code:

#include <qapplication.h>
#include <qlabel.h>


int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	QLabel *label = new QLabel("Hello QT!",0);
	app.setMainWidget(label);
	label->show();
	return app.exec();
}

Any help would be very much appreciated.

_john_i_ · 11-06-2006, 02:46 PM

After the "qmake -project" look to see if it created a "hello.pro". For me it creates "qt.pro". I have to rename to "qt.pro" to "hello.pro", and then "qmake hello.pro" followed by "make" works.

MaTrIx709 · 11-06-2006, 03:18 PM

Qmake seems to have output the correct .pro file

Code:

$ls
hello.ccp  hello.ccp~  hello.pro  Makefile
$

greymaus · 11-06-2006, 07:59 PM

When I have a .pro file (as you have hello.pro) I just type "make" (without the quote marks, of course) and I get an executable, with no extension. In your case, that should be "hello".

MaTrIx709 · 11-07-2006, 02:48 AM

From what I read in my QT book, I should get an executable just like greymaus says.

Here is some more information incase anyone else wants to jump in and help.

I'm running Debian Etch.
As far as I'm aware, I've installed all the required libraries

_john_i_ · 11-07-2006, 03:28 AM

Maybe qmake doesn't know what to do with a file with a ".ccp" extension. I've always used .cpp, .C, or .cc.
You might try renaming it to hello.cpp

MaTrIx709 · 11-07-2006, 07:15 AM

I copied the hello.cpp file into two other places

Code:

$ cp hello.ccp hello.cc && cp hello.cpp hello.c

When I ran the following commands

Code:

$ qmake -project && qmake hello.pro && make

I received what look like compiler errors, which I never got before.

So, I think I am a step closer to getting the code to compile. I have to go back to work and will carry on in the evening.

Thanks all.

MaTrIx709 · 11-07-2006, 01:22 PM

I fixed my problem:

I removed all files from the compile directory and tried to compile again. It worked this time.

I have one .cc file and used the command

Code:

$ qmake -project && qmake hello.pro && make && ./hello

Thanks for all the help