-- a/config.mk
++ b/config.mk
CFLAGS_OPTIONS := $(CFLAGS)
ifeq (${USEGTK3}, 1)
CPPFLAGS+=-DGTK_DISABLE_SINGLE_INCLUDES
CPPFLAGS+=-DGTK_DISABLE_DEPRECATED
CPPFLAGS+=-DGDK_DISABLE_DEPRECATED
CPPFLAGS+=-DGSEAL_ENABLE
M4FLAGS += -DWITH_GTK3=1
endif