| _cc-option-supported = $(if $(shell $(CC$(sm)) $(1) -c -x c /dev/null -o /dev/null 2>/dev/null >/dev/null || echo "Not supported"),,1) |
| _cc-opt-cached-var-name = $(subst =,~,$(strip cached-cc-option-$(1)-$(subst $(empty) $(empty),,$(CC$(sm))))) |
| define _cc-option |
| $(eval _var_name := $(call _cc-opt-cached-var-name,$(1))) |
| $(eval $(_var_name) := $(if $(filter $(origin $(_var_name)),undefined),$(call _cc-option-supported,$(1)),$($(_var_name)))) |
| $(if $($(_var_name)),$(1),$(2)) |
| endef |
| cc-option = $(strip $(call _cc-option,$(1),$(2))) |
| |
| _ld-option-supported = $(if $(shell ($(LD$(sm)) -v $(1) 2>&1 || echo warning) | grep warning),,1) |
| _ld-opt-cached-var-name = $(subst =,~,$(subst $(empty) $(empty),,$(strip cached-ld-option-$(1)-$(LD$(sm))))) |
| define _ld-option |
| $(eval _var_name := $(call _ld-opt-cached-var-name,$(1))) |
| $(eval $(_var_name) := $(if $(filter $(origin $(_var_name)),undefined),$(call _ld-option-supported,$(1)),$($(_var_name)))) |
| $(if $($(_var_name)),$(1),$(2)) |
| endef |
| ld-option = $(strip $(call _ld-option,$(1),$(2))) |