/usr/include/gimp-2.0/libgimp/gimpexport.h:23:2: error: #error "Only <libgimp/gimpui.h> can be included directly."
/usr/include/gimp-2.0/libgimp/gimpexport.h:58:1: error: unknown type name ‘GtkWidget’
/usr/include/gimp-2.0/libgimp/gimpexport.h:61:1: error: unknown type name ‘GtkWidget’
/usr/include/gimp-2.0/libgimp/gimpexport.h:61:57: error: unknown type name ‘GtkWidget’