[U-Boot] Question about board-specific Makefile actions

[Tom Rini]

On Tue, Mar 03, 2015 at 01:39:35PM -0800, James Chargin wrote:
> I have a custom board in a git workspace for U-Boot 2014.07. I've
> copied most of this from the .../board/ti/beagle. My board directory
> Makefile looks like
> 
> 8<---
> obj-y := board.o
> 8<---
> 
> I'd like to add a few files to this directory that are processed
> during "make all" and have any newly derived files deleted during
> "make clean".
> 
> I've experimented with various Makefile contents but I can't get the
> new files processed or any newly derived files deleted. U-Boot's
> makefile system is quite large for my experience level and it seems
> I don't have enough understanding.
> 
> A new file might contain some hush commands that are to be executed
> from the U-Boot command line. I'd like to use "source" to process
> these commands. The "source" command requires that its argument be
> an image (I get this into memory via TFTP), so I'd like "make all"
> to transform the text file containing the hush commands into the
> image file. I'd also like "make clean" to delete the derived image
> file.
> 
> So, if my hush commands are in a text file called test.txt, I'd like
> "make all" to apply mkimage so that a test.img is generated. I'd
> also like "make clean" to delete test.img.
> 
> I tried various changes to my Makefile, but the most likely seeming
> changes are
> 
> 8<---
> IMG  = test.img
> 
> obj-y	:= board.o
> 
> board.o : $(IMG)
> 
> %.img : %.txt
> 	$(srctree)/tools/mkimage -T script -n $* -C none -d $< $@
> 
> CLEAN_FILES += $(IMG)
> CLEAN_DIRS  += .
> 8<---
> 
> This doesn't work, nor has any other approach I've taken. mkimage is
> never run for "make all" and test.img doesn't get deleted if I
> create a fake one and run "make clean"
> 
> Could someone offer a solution, either directly, or by pointing at
> an existing board that does something similar?

Off the top of my head, try throwing test.img into obj-y ?

-- 
Tom
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