1) apt-get install gtk+3.0 libgtk-3-dev
причем пакет gtk+3.0 можно не устанавливать
2) https://developer.gnome.org/gtk3/stable/gtk-getting-started.html#id-1.2.3.5
#include <gtk/gtk.h> static void activate (GtkApplication* app, gpointer user_data) { GtkWidget *window; window = gtk_application_window_new (app); 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; }
gcc `pkg-config --cflags gtk+-3.0` -o example-0 example-0.c `pkg-config --libs gtk+-3.0`