Thread: GTK+ - Problems installing dev-lib

So i have spent the better part of a day now trying to work this out myself, however i feel I'm almost at the point where it's becoming counter productive, as I've tried everything i can think of, including using apt to install from the official repos and also downloaded source and built the library that way... I have actually installed GTK in the past, however this was some time ago and i remember having issues that time, but from memory, building from source fixed whatever problem i had back then.

Then i went to use the library again recently and it was not working, however i think i may have reinstalled Linux since then.
So i try install using apt, it just installs a bunch of other packages, and the #include in my C program does not find the library at all.
Then i download and build from source, my IDE recognizes the library, but none of the functions are recognized? I am using CLION, but i also had no luck trying to compile a program from the terminal.

What could i possibly be doing wrong?

This is compiler output.. But regardless of this, still none of the functions are recognized?

Code:

[ 50%] Building C object CMakeFiles/gtkz3.dir/main.c.o
In file included from /root/CLionProjects/gtkz3/main.c:1:0:
/usr/include/gtk-3.0/gtk/gtk.h:30:21: fatal error: gdk/gdk.h: No such file or directory
 #include <gdk/gdk.h>
                     ^
compilation terminated.
CMakeFiles/gtkz3.dir/build.make:62: recipe for target 'CMakeFiles/gtkz3.dir/main.c.o' failed
make[3]: *** [CMakeFiles/gtkz3.dir/main.c.o] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/gtkz3.dir/all' failed
make[2]: *** [CMakeFiles/gtkz3.dir/all] Error 2
CMakeFiles/Makefile2:79: recipe for target 'CMakeFiles/gtkz3.dir/rule' failed
make[1]: *** [CMakeFiles/gtkz3.dir/rule] Error 2
Makefile:118: recipe for target 'gtkz3' failed
make: *** [gtkz3] Error 2

I installed Curl, OpenSSL, and other libraries recently with no problem, i'm not sure why GTK always gives me so much trouble.

Just saying "using apt to install" and "compile a program from the terminal" tells us very little. HOW did you use apt? HOW did you compile the program? Show the exact command lines (look them up in your history). Also, mentioning your distro might be helpful. And showing the includes in your program could be useful, too.

"Kali Linux is a Debian-derived Linux distribution designed for digital forensics and penetration testing."

Anyway, the first possibility is that gtk3 is already installed (why not?).

What does this show?
dpkg -l libgtk* | grep ^i

Your apt-get line should have been:
apt-get install libgtk-3-dev

This assumes that libgtk-3-dev is available in the repositories you have listed in /etc/apt/sources.list (This page seems to suggest that you should only have one repository listed there.

To compile from source you need to read this and this.

In your code, you only need to say #include <gtk/gtk.h>. For the compilation step, the headers are found by passing the appropriate -I flags to gcc. For the linking step, the libaries are found by passing the appropriate -l flags.

The usual way to compile is to use pkg-config which automatically adds the appropriate flags:
gcc myprog.c $(pkg-config --libs --cflags gtk+-3.0) -o myprog

This assumes pkg-config is installed and the appropriate .pc file has been installed in the proper location.

I have installed "apt-file" and that's okay, the output was exactly as yours shows in the example. But there's still a bunch of problems that seem to be possibly caused by dependencies such as glib. These dependencies are all installed though. And i did not have this much trouble last time i installed and used GTK. Is there some way i can fix all the dependency problems? Right now the only thing that seems to resolve the compiler errors is by adding a bunch of include_directories() in the CMakeLists.txt file for the project. But I'm not really prepared to sit and add them all one by one like that as i know there is obviously some problem seeing as i have never had to do such a thing in the past.

So you tried compiling from the command line with pkg-config as I showed and it still didn't work?

Ok sorry, When i compile an example program using the terminal exactly as you described, it works, i still get a message 'failed to load module "canberra-gtk-module"', but it does compile, and it opens a window, however when i try in CLion IDE it does not compile, and does not at all recognize any functions used in the program. But this is the only library that i am experiencing this problem with.

I don't know CLion, but you need to add `pkg-config --cflags gtk+-3.0` to the compile options and `pkg-config --libs gtk+-3.0` to the linker options.
Alternatively, you could run those commands in a terminal (obviously without the backticks) and copy/paste the output.

As for the problem with canberra-gtk-module, try google.

I think modifying CMake file has helped with the issue of not finding functions, aside from one, being gtk_application_window_new() ?.

Here's my CMake file

Code:

cmake_minimum_required(VERSION 3.7)
project(gtkz3)

set(CMAKE_C_STANDARD 99)

set(SOURCE_FILES main.c)
add_executable(gtkz3 ${SOURCE_FILES})
find_package(PkgConfig)
if (PKG_CONFIG_FOUND)
    pkg_check_modules(GTK "gtk+-3.0")
    if (GTK_FOUND)
        target_link_libraries(gtkz3 ${GTK_LIBRARIES})
        add_definitions(${GTK_CFLAGS} ${GTK_CFLAGS_OTHER})
    endif()
endif()

Any suggestions as to why there's now an error resolving just that one funtion?

Here's the example code i'm using from gnome.org

Code:

#include <gtk/gtk.h>

static void activate (GtkApplication* app, gpointer        user_data)
{
    GtkWidget *window;
    window = gtk_application_window_new(app);  //Cannot resolve this function?
    gtk_window_set_title (GTK_WINDOW (window), "Window");
    gtk_window_set_default_size (GTK_WINDOW (window), 200, 200);
    gtk_widget_show_all (window);
}

int main (int    argc, char **argv) {
    GtkApplication *app;
    int status;

    app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
    g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
    status = g_application_run (G_APPLICATION (app), argc, argv);
    g_object_unref (app);

    return status;
}

It seems after restarting my system and running the IDE again it's managed to resolve the function
And i'm almost 100% sure it wasn't this difficult last time. :S
At least it is working now.
Thanks heaps for the help, it's very much appreciated.