ffmpeg: there was a problem of structure in makefile.

ffmpeg: there was a problem of structure in makefile.

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(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.
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$ 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.

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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.

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.version: $(wildcard $(GIT_LOG)) $(VERSION_SH) config.mak
.version: M=@

and $(SRC_PATH) is "/" is so that we could not find other .mak files.

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1. Set $(SRC_PATH) well.
2. Place *.mak files well.

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download: https://ffmpeg.org/download.html
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contact: https://ffmpeg.org/contact.html
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