# LN_HEADERS       .. if "y", header files are symbolicaly linked instead of copied.
ifeq ($(OMK_VERBOSE),1)
CPHEADER_FLAGS += -v
LNHEADER_FLAGS += -v
endif

ifneq ($(LN_HEADERS),y)
define cp_cmd
if ! cmp -s $(1) $(2); then \
    echo "  CP      $(1:$(OUTPUT_DIR)/%=%) -> $(2:$(OUTPUT_DIR)/%=%)"; \
    install -d $(CPHEADER_FLAGS) `dirname $(2)` && \
    install $(CPHEADER_FLAGS) $(1) $(2) || exit 1; \
fi
endef
else
define cp_cmd
if ! cmp -s $(1) $(2); then \
    echo "  LN      $(1:$(OUTPUT_DIR)/%=%) -> $(2:$(OUTPUT_DIR)/%=%)"; \
    if [ -f $(1) ]; then d=$(2); mkdir -p $${d%/*} && ln -sf $(LNHEADER_FLAGS) $(1) $(2) || exit 1; else exit 1; fi; \
fi
endef
endif

# TODO: Check modification date of changed header files. If it is
# newer that in source dir, show a warning.

# Syntax: $(call include-pass-template,<include dir>,<keyword>)
define include-pass-template
include-pass-local: include-pass-local-$(2)
include-pass-local-$(2): $$($(2)_GEN_HEADERS) $$(foreach f,$$(renamed_$(2)_GEN_HEADERS),$$(shell f='$$(f)'; echo $$$${f%->*}))
	@$$(foreach f, $$($(2)_HEADERS),$$(call cp_cmd,$$(SOURCES_DIR)/$$(f),$(1)/$$(notdir $$(f))); )
# FIXME: Use correct build dir, then document it (in the line bellow)
	@$$(foreach f, $$($(2)_GEN_HEADERS),$$(call cp_cmd,$$(LOCAL_BUILD_DIR)/$$(f),$(1)/$$(notdir $$(f))); )
	@$$(foreach f, $$(nobase_$(2)_HEADERS), $$(call cp_cmd,$$(SOURCES_DIR)/$$(f),$(1)/$$(f)); )
	@$$(foreach f, $$(renamed_$(2)_HEADERS), \
	   f='$$(f)'; srcfname=$$$${f%->*}; destfname=$$$${f#*->}; \
	   $$(call cp_cmd,$$(SOURCES_DIR)/$$$${srcfname},$(1)/$$$${destfname}); )
	@$$(foreach f, $$(renamed_$(2)_GEN_HEADERS), \
	   f='$$(f)'; srcfname=$$$${f%->*}; destfname=$$$${f#*->}; \
	   $$(call cp_cmd,$$(LOCAL_BUILD_DIR)/$$$${srcfname},$(1)/$$$${destfname}); )
# Suppress "Nothing to be done for `include-pass-local'" message if no headers are defined in Makefile.omk
	@$$(if $$($(2)_HEADERS)$$($(2)_GEN_HEADERS)$$(nobase_$(2)_HEADERS)$$(renamed_$(2)_HEADERS)$$(renamed_$(2)_GEN_HEADERS),,true)
endef