# cmetric_include_HEADERS    .. generate header file with offsets and sizes of structure fields
# xxx_CMETRIC_SOURCES	     .. the source cmetric generation

NM ?= nm

# Syntax: $(call CMETRIC_o_h_template,<object_file>,<target_header>)
define CMETRIC_o_h_template
$(2): $(1)
	@$(QUIET_CMD_ECHO) "  CMETRIC $$@"
	$(Q)if [ -n `dirname $$@` ] ; then \
	      if [ ! -e `dirname $$@` ] ; then \
	        mkdir -p `dirname $$@` ; fi ; fi
	$(Q)echo >$$@.tmp '/* Automatically generated from $$< */'
	$(Q)echo >>$$@.tmp '/* Conditionals to control compilation */'
# Bellow, the tricks with redirection are for shells without set -o pipefail
# (see http://www.mail-archive.com/dash@vger.kernel.org/msg00149.html)
	$(Q)exec 3>&1; status=`exec 4>&1 >&3; { $(NM) $$<; echo $$$$? >&4; }\
		| $(SED4OMK) -n 's/^ *0*\(0[0-9A-Fa-f]*\) *A *_cmetric2cond_\([A-Za-z_0-9]*\) */#define \2 0x\1/p' \
		| sort >>$$@.tmp` && exit $$$$status
	$(Q)echo >>$$@.tmp '/* Defines from the values defined to symbols in hexadecimal format */'
	$(Q)exec 3>&1; status=`exec 4>&1 >&3; { $(NM) $$<; echo $$$$? >&4; }\
		| $(SED4OMK) -n 's/^ *0*\(0[0-9A-Fa-f]*\) *A *_cmetric2def_\([A-Za-z_0-9]*\) */#define \2 0x\1/p' \
		| sort >>$$@.tmp` && exit $$$$status
	$(Q)echo >>$$@.tmp '/* Defines from the values defined to symbols in decimal format */'
	$(Q)exec 3>&1; status=`exec 4>&1 >&3; { $(NM) -td $$<; echo $$$$? >&4; }\
		| $(SED4OMK) -n 's/^ *0*\(0\|[1-9][0-9]*\) *A *_cmetric2defdec_\([A-Za-z_0-9]*\) */#define \2 \1/p' \
		| sort >>$$@.tmp` && exit $$$$status
	$(Q)mv $$@.tmp $$@
endef

library-pass-local: $(addprefix $(USER_INCLUDE_DIR)/,$(cmetric_include_HEADERS))

# Special rules for CMETRIC generated headers

$(foreach cmetrh,$(cmetric_include_HEADERS),$(eval $(call COMPILE_c_o_template,\
		$(SOURCES_DIR)/$($(basename $(notdir $(cmetrh)))_CMETRIC_SOURCES),\
		$($(basename $(notdir $(cmetrh)))_CMETRIC_SOURCES:%.c=%.o),)))
$(foreach cmetrh,$(cmetric_include_HEADERS),$(eval $(call CMETRIC_o_h_template,\
		$($(basename $(notdir $(cmetrh)))_CMETRIC_SOURCES:%.c=%.o),\
		$(addprefix $(USER_INCLUDE_DIR)/,$(cmetrh)))))

GEN_HEADERS+=$(cmetric_include_HEADERS:%=$(USER_INCLUDE_DIR)/%)