me@cpe-24-33-229-126:~$ gcc heelo.c -o helloworld `pkg-config --cflags --libs glib-2.0`
heelo.c:1:21: error: gtk/gtk.h: No such file or directory
heelo.c:5: error: syntax error before * token
heelo.c:11: error: syntax error before delete_event
heelo.c:11: error: syntax error before * token
heelo.c: In function delete_event:
heelo.c:26: error: TRUE undeclared (first use in this function)
heelo.c:26: error: (Each undeclared identifier is reported only once
heelo.c:26: error: for each function it appears in.)
heelo.c: At top level:
heelo.c:30: error: syntax error before * token
heelo.c: In function main:
heelo.c:40: error: GtkWidget undeclared (first use in this function)
heelo.c:40: error: window undeclared (first use in this function)
heelo.c:41: error: button undeclared (first use in this function)
heelo.c:48: error: GTK_WINDOW_TOPLEVEL undeclared (first use in this function)heelo.c:56: error: NULL undeclared (first use in this function)
heelo.c:80: error: gtk_widget_destroy undeclared (first use in this function)
me@cpe-24-33-229-126:~$