Yocto Recipe for a GTK Application

Say, you have a GTK Application and you want this application to be compiled and installed on the target machine.

hello_gtk.c

	#include <gtk/gtk.h>
	int main (int argc, char *argv[])
	{
	GtkWidget *window;// GtkWidget is the storage type for widgets
	gtk_init (&argc, &argv);// This is called in all GTK applications. Arguments are parsed
	//from the command line and are returned to the application.
	window=gtk_window_new(GTK_WINDOW_TOPLEVEL); //creating a new window.
	gtk_widget_show(window);
	gtk_main (); //All GTK applications must have a gtk_main(). Control ends here
	//and waits for an event to occur (like a key press or mouse event).
	return 0;
	}

view raw hello_gtk.c hosted with ❤ by GitHub

To compile on your own machine you run the following command.

$ gcc files/hello_gtk.c -o hello_gtk `pkg-config --cflags --libs gtk+-3.0`

Steps to achieve the same on your Yocto Image:

1. Create a folder named 'gtk-hello' in your own layer : mkdir gtk-hello

2.  Create a recipe named 'gtk-hello_1.0.bb' in the newly created folder with the following contents:

	DESCRIPTION = "Simple GTK 3.0 Hello World Application"
	LICENSE = "CLOSED"
	SRC_URI = "file://hello_gtk.c"
	S = "${WORKDIR}"
	DEPENDS = "gtk+3"
	inherit pkgconfig
	do_compile() {
	${CC} ${LDFLAGS} hello_gtk.c -o hello_gtk `pkg-config --cflags --libs gtk+-3.0`
	}
	do_install() {
	install -d ${D}${bindir}
	install -m 0755 hello_gtk ${D}${bindir}
	}
	FILES_${PN} += "${bindir}/hello_gtk"

view raw gtk-hello_1.0.bb hosted with ❤ by GitHub

3. Create a folder inside 'gtk-hello'  named files and copy the 'hello_gtk.c' file into it

4. To include this add IMAGE_INSTALL += "gtk-hello" into local.conf or your machine configuration