##############  -*- makefile-gmake -*-
# C programs #
##############

c++ext = cc C cxx cpp
c++sources = $(foreach ext,$(c++ext),$(filter %.$(ext),$(1)))

###
# template_variables - variables common to program, libraries, ...
#
define template_variables
USER_IDLS  += $$($(1)_SERVER_IDL) $$($(1)_CLIENT_IDL) $$($(1)_IDL)
$(1)_GEN_SOURCES += $$(call IDL_SERVER_SOURCES,$$($(1)_SERVER_IDL))
$(1)_GEN_SOURCES += $$(call IDL_CLIENT_SOURCES,$$($(1)_CLIENT_IDL))
$(1)_GEN_SOURCES += $$(sort $$(call IDL_SERVER_SOURCES,$$($(1)_IDL)) \
		    	    $$(call IDL_CLIENT_SOURCES,$$($(1)_IDL)))
USER_GEN_SOURCES += $$($(1)_GEN_SOURCES)
$(1)_OBJS += $(foreach ext,c $(c++ext),$$(patsubst %.$(ext),%.o,$$(filter %.$(ext),$$($(1)_SOURCES) $$($(1)_GEN_SOURCES))))
$(1)_OBJS := $$(sort $$($(1)_OBJS:%/=%)) # Why is here the backslash substitution???
$(1)_OBJS := $$(addprefix $(USER_OBJS_DIR)/,$$(sort $$($(1)_OBJS:%/=%)))

USER_OBJS  += $$($(1)_OBJS)
USER_SOURCES += $$($(1)_SOURCES)
endef

###
# program_template
#
# Usage: $(call program_template,<executable-name>,<bin|utils|test>)
define program_template
$(template_variables)
$$(eval $$(call prepare_rule_goal,\
	$(USER_BIN_DIR)/$(1)$(EXE_SUFFIX),\
	$$($(1)_OBJS),\
	"LINK    ",\
	$$(call program_cmd,$(1))))
endef

###
# library_template
#
# Usage: $(call library_template,<library-name>)
define library_template
$(template_variables)
$$(eval $$(call prepare_rule_goal,\
	$(USER_LIB_DIR)/lib$(1).a,\
	$$($(1)_OBJS),\
	"AR      ",\
	$$(call library_cmd,$(1))))
endef

###
# solib_template
#
# Usage: $(call solib_template,<library-name>)
define solib_template
$(template_variables) # FIXME: OBJSLO, etc.
# TODO: Add dependencies on other shared libraries ala:
# $(1)_libs += $$($(1)_LIBS) $$(lib_LOADLIBES)
# $(1)_shared_libs = $$(patsubst %,$(USER_LIB_DIR)/lib%.$(SOLIB_EXT),$$(filter $$(shared_libs),$$($(1)_libs)))

$$(eval $$(call prepare_rule_goal,\
	$(USER_LIB_DIR)/lib$(1).$(SOLIB_EXT),\
	$$($(1)_OBJS),\
	"LINK    ",\
	$$(call solib_cmd,$(1))))
endef

ifneq ($(bin_PROGRAMS)$(test_PROGRAMS)$(utils_PROGRAMS)$(lib_LIBRARIES)$(shared_LIBRARIES),)
prepare-pass::
	@$(call mkdir_def,$(USER_OBJS_DIR))
endif

# TODO: $(foreach cmetrh,...)

$(foreach prog,$(bin_PROGRAMS),$(eval $(call program_template,$(prog),bin)))
$(foreach prog,$(utils_PROGRAMS),$(eval $(call program_template,$(prog),utils)))
$(foreach prog,$(test_PROGRAMS),$(eval $(call program_template,$(prog),test)))
$(foreach lib,$(lib_LIBRARIES),$(eval $(call library_template,$(lib))))
$(foreach lib,$(shared_LIBRARIES),$(eval $(call solib_template,$(lib))))

$(foreach src,$(filter %.c,$(USER_SOURCES)),\
	$(eval $(call prepare_rule,\
		$(USER_OBJS_DIR)/$(src:%.c=%.o),\
		$(SOURCES_DIR)/$(src),\
		"CC      ",\
		$(c_o_cmd))))