gtk/gtk.h problem

[ivanBG]

Hi, I am am trying to learn gtk programing. I use Ubuntu 10.10, and that is what I want to compile(the first gtk tutorial):

#include <gtk/gtk.h>
int main(int argc, char *argc[])
{
GtkWidget *window;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_show (window);
gtk_main ();
return 0;
}

The problem is that bough g++ and gcc can't find "gtk/gtk.h":
"gtk.cpp:1: fatal error: gtk/gtk.h: No such file or directory
compilation terminated."
I have already installed libgtk2.0-dev and it doesn't help. How can I solve that issue? Thank you!

[Athar]

You're missing some include paths.
Add the following to the compiling call: `pkg-config gtk+-2.0 --cflags`
And the following to the linking call: `pkg-config gtk+-2.0 --libs`

Note that there is gtkmm, which is probably a better choice if you're using C++.

[ivanBG]

What will be the correct syntax of the command? I used to be windows user and steel can't get comfortable enough with those compilers.

[Athar]

Example:

g++ main.cpp -Os -s `pkg-config gtk+-2.0 --cflags` `pkg-config gtk+-2.0 --libs`

Note that your second parameter in main has the same name as the first one. The second one is normally called argv.

[ivanBG]

Fixed the syntax error, and tried to compile:
g++ gtk.cpp -Os -s `pkg-config gtk+-2.0 --cflags` `pkg-config gtk+-2.0 --libs`
And this is what I get:

gtk.cpp: In function ‘int main(int, char**)’:
gtk.cpp:5: error: ‘GtkWidget’ was not declared in this scope
gtk.cpp:5: error: ‘window’ was not declared in this scope
gtk.cpp:7: error: ‘gtk_init’ was not declared in this scope
gtk.cpp:9: error: ‘GTK_WINDOW_TOPLEVEL’ was not declared in this scope
gtk.cpp:9: error: ‘gtk_window_new’ was not declared in this scope
gtk.cpp:10: error: ‘gtk_widget_show’ was not declared in this scope
gtk.cpp:12: error: ‘gtk_main’ was not declared in this scope 

Solved it. Thanks for the help!

[Athar]

Strange, this compiles fine for me on Ubuntu 10.10.
I assume you're missing another package. You can try installing libgtkmm-2.4-dev. Perhaps it will cause the missing dependency to be installed, whatever it might be.