I recently decided to learn gtk+, so I installed the gtk3 developement package which contains all the necessary libraries, then I just wrote a simple program test which is supposed to display a gtk window simply and compiles it with the command below :

gcc `pkg-config --cflags --libs gtk+-3.0` main.c -o test

And the problem is at link time where I'm getting undefined reference to all the functions call :(

    /tmp/ccVQOyCZ.o: In function `main':

main.c:(.text+0x1f): undefined reference to `gtk_init'

main.c:(.text+0x29): undefined reference to `gtk_window_new'

main.c:(.text+0x43): undefined reference to `g_type_check_instance_cast'

main.c:(.text+0x64): undefined reference to `g_signal_connect_data'

main.c:(.text+0x70): undefined reference to `gtk_widget_show'

main.c:(.text+0x75): undefined reference to `gtk_main'

/tmp/ccVQOyCZ.o: In function `OnDestroy':

main.c:(.text+0x96): undefined reference to `gtk_main_quit'

collect2: ld returned 1 exit status

Voilà, if anyone has a solution...