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Tue Jan 19 7:35:11 CET 2010

Non-recursive make

Main trick:

# Build makfile by including all makefile fragments.
define do_include
MODULE := $(1)
include $(1)/module.mk
PROJECT_SRC := $(PROJECT_SRC) $$(patsubst %, $(1)/%, $$(SRC))
# DUMMY := $$(shell echo $(1) : $$(SRC) >&2)
SRC :=
endef
$(foreach prog,$(MODULES),$(eval $(call do_include,$(prog))))


This works for the .o files.  Now, how to make the .a files
(i.e. aggregation) and how to make the .h_prims files (header
generation which messes up GCC's dependency generation.

The latter is the real problem.  What would solve it is to generate a
dependency file of the .d file itself, and generate the deps in two
steps.

What seems to work is -MM which skips system files.

-MG In conjunction with an option such as -M requesting dependency
    generation, -MG assumes missing header files are generated files
    and adds them to the dependency list without raising an error.
    The dependency filename is taken directly from the "#include"
    directive without prepending any path.  -MG also suppresses
    preprocessed output, as a missing header file renders this
    useless.

That was easy!



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