ffmpeg: there was a problem of structure in makefile. - (20210604: ) About ffmpeg : there was a problem. downloaded and not compiled well. ffmpeg doesn't have any window toolkit so that we could compile it well. - 2 - $ make all Makefile:2: config.mak: No such file or directory Makefile:67: /common.mak: No such file or directory Makefile:109: /libavutil/Makefile: No such file or directory Makefile:109: /library.mak: No such file or directory Makefile:111: /doc/Makefile: No such file or directory Makefile:201: /tests/Makefile: No such file or directory make: *** No rule to make target `/tests/Makefile'. Stop. - 3 - include $(SRC_PATH)/$(1)/Makefile -include $(SRC_PATH)/$(1)/$(ARCH)/Makefile -include $(SRC_PATH)/$(1)/$(INTRINSICS)/Makefile include $(SRC_PATH)/library.mak endef from library.mak: we could think of being mark for construction of directory in makefile. - 4 - .version: $(wildcard $(GIT_LOG)) $(VERSION_SH) confi...