Re: Possible GNU Make 4.3 bug

[Steven Simpson]

Hi Eldred,

On 15/03/2021 22:25, Eldred HABERT wrote:

The bug is the following two lines:

   Must remake target 'res/tpnk_dev_logo_tiles.2bpp.pb16.size'.
   Successfully remade target file 'res/tpnk_dev_logo_tiles.2bpp.pb16.size'.

This .size file appears to be a generated header for assembly source, and the assembler has generated rules for it:

obj/starting_screen.o dep/starting_screen.mk : res/tpnk_dev_logo_tiles.2bpp.pb16.size
res/tpnk_dev_logo_tiles.2bpp.pb16.size:

I understand the need for the second rule, but it also defines an empty recipe, and this one doesn't apply:

$(RESDIR)/%.pb16.size: $(RESDIR)/%
	@$(MKDIR_P) $(@D)
	$(call filesize,$<,16) > $(RESDIR)/$*.pb16.size

...because the prerequisite res/tpnk_dev_logo_tiles.2bpp doesn't exist, and no rule exists to create it.

There is a src/res/starting_screen/tpnk_dev_logo/tpnk_dev_logo_tiles.2bpp, and you have VPATH set to src, but I don't think VPATH is supposed to recursively search subdirectories.  A solution would have to identify these subdirectories somehow, e.g.:

SRCDIRS := $(shell find $(SRCDIR) -type d)
vpath %.2bpp $(SRCDIRS)

$(RESDIR)/%.2bpp: %.2bpp
	@$(MKDIR_P) $(@D)
	cp $< $@

That allowed res/tpnk_dev_logo_tiles.2bpp.pb16.size to build for me.

Cheers,

Steven