Hi James,
2015-03-14 3:08 GMT+09:00 James Chargin jimccrown@gmail.com:
These are correct in sub-directory Makefiles in general, but unfortunately, "make clean" does not descend into board/ directory for some reason.
So, they do not work in board/*/Makefile
Should this be considered a bug in the build system?
Kind of.
I hope it will be solved in a long run.
In U-Boot, ARCH, VENDOR, BOARD directories are still treated specially for some historical reason.
Board directory is selected like follows: libs-y += $(if $(BOARDDIR),board/$(BOARDDIR)/)
and it has made it difficult to descend into board/ by "make clean" because "make clean" should not expect the existing .config file.
If we could completely switched to "obj-$(CONFIG_FOO)" style in the future, this problem would go away. We need more effort to achieve this.
Should make descend into the board directory?
Yes.
Or, at least, should there not be a way for a board directory to indicate which of any locally generated derived objects should be cleaned up? I hesitate to add to the top level Makefile for my specific board.
Sorry, I cannot suggest a good solution now.