My understanding of C is quite poor. I can read the code, but I have no idea how to include/build/make/configure anything. This is probably why I do not manage to get the following Go code to compile. This code my attempt at adapting https://developer.gnome.org/gtk3/3.0/gtk-getting-started.html to Go.
package main
// #cgo pkg-config: gtk+-3.0
// #include <gtk/gtk.h>
import "C"
func main() {
C.gtk_init(nil, nil)
window := C.gtk_window_new(C.GTK_WINDOW_TOPLEVEL)
C.g_signal_connect(window, "destroy", C.G_CALLBACK(C.gtk_main_quit), nil)
C.gtk_widget_show(window)
C.gtk_main()
}
The offending line is C.g_signal_connect(...). The errors are:
1: error: 'G_CALLBACK' undeclared (first use in this function)
1: error: 'g_signal_connect' undeclared (first use in this function)
1: note: each undeclared identifier is reported only once for each function it appears in
If I remove the line, then the code works and the gtk windows opens.
I figured out that this g_signal_connect comes from glib-object.h, which is included in many header files of gtk. I tried to include it myself:
// #cgo pkg-config: gtk+-3.0 glib-2.0
// #include <gtk/gtk.h>
// #include <glib-object.h>
but it did not solve anything.
Does anybody know what I am doing wrong?
