# 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
( echo "  CP      $(1:$(OUTPUT_DIR)/%=%) -> $(2:$(OUTPUT_DIR)/%=%)"; cp $(CPHEADER_FLAGS) $(1) $(2) )
endef
else
define cp_cmd
( echo "  LN      $(1:$(OUTPUT_DIR)/%=%) -> $(2:$(OUTPUT_DIR)/%=%)"; [ -f $(1) ] && ln -sf $(LNHEADER_FLAGS) $(1) $(2) )
endef
endif

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

# Syntax: $(call include-pass-template,<include dir>,<keyword>)
define include-pass-template
	@$(foreach f, $($(2)_HEADERS), cmp --quiet $(SOURCES_DIR)/$(f) $(1)/$(notdir $(f)) \
	   || $(call cp_cmd,$(SOURCES_DIR)/$(f),$(1)/$(notdir $(f))) || exit 1 ; )
	@$(foreach f, $($(2)_GEN_HEADERS), cmp --quiet $(f) $(1)/$(notdir $(f)) \
	   || $(call cp_cmd,$(LOCAL_BUILD_DIR)/$(f),$(1)/$(notdir $(f))) || exit 1 ; ) # FIXME: Use correct build dir, then document it
	@$(foreach f, $(nobase_$(2)_HEADERS), cmp --quiet $(SOURCES_DIR)/$(f) $(1)/$(f) \
	   || ( mkdir -p $(1)/$(dir $(f)) && $(call cp_cmd,$(SOURCES_DIR)/$(f),$(1)/$(f)) ) || exit 1 ; )
	@$(foreach f, $(renamed_$(2)_HEADERS), \
	   srcfname=`echo '$(f)' | sed -e 's/^\(.*\)->.*$$/\1/'` ; destfname=`echo '$(f)' | sed -e 's/^.*->\(.*\)$$/\1/'` ; \
	   cmp --quiet $(SOURCES_DIR)/$${srcfname} $(1)/$${destfname} \
	   || ( mkdir -p `dirname $(1)/$${destfname}` && $(call cp_cmd,$(SOURCES_DIR)/$${srcfname},$(1)/$${destfname}) ) || exit 1 ; )
endef

# Local Variables:
# mode:makefile
# End: