1*e1cfdc0eSMasahiro Yamada# Kconfig helper macros 2*e1cfdc0eSMasahiro Yamada 3*e1cfdc0eSMasahiro Yamada# Convenient variables 4*e1cfdc0eSMasahiro Yamadacomma := , 5*e1cfdc0eSMasahiro Yamadaquote := " 6*e1cfdc0eSMasahiro Yamadasquote := ' 7*e1cfdc0eSMasahiro Yamadaempty := 8*e1cfdc0eSMasahiro Yamadaspace := $(empty) $(empty) 9*e1cfdc0eSMasahiro Yamadadollar := $ 10*e1cfdc0eSMasahiro Yamadaright_paren := ) 11*e1cfdc0eSMasahiro Yamadaleft_paren := ( 12*e1cfdc0eSMasahiro Yamada 13*e1cfdc0eSMasahiro Yamada# $(if-success,<command>,<then>,<else>) 14*e1cfdc0eSMasahiro Yamada# Return <then> if <command> exits with 0, <else> otherwise. 15*e1cfdc0eSMasahiro Yamadaif-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)") 16*e1cfdc0eSMasahiro Yamada 17*e1cfdc0eSMasahiro Yamada# $(success,<command>) 18*e1cfdc0eSMasahiro Yamada# Return y if <command> exits with 0, n otherwise 19*e1cfdc0eSMasahiro Yamadasuccess = $(if-success,$(1),y,n) 20*e1cfdc0eSMasahiro Yamada 21*e1cfdc0eSMasahiro Yamada# $(cc-option,<flag>) 22*e1cfdc0eSMasahiro Yamada# Return y if the compiler supports <flag>, n otherwise 23*e1cfdc0eSMasahiro Yamadacc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) 24*e1cfdc0eSMasahiro Yamada 25*e1cfdc0eSMasahiro Yamada# $(ld-option,<flag>) 26*e1cfdc0eSMasahiro Yamada# Return y if the linker supports <flag>, n otherwise 27*e1cfdc0eSMasahiro Yamadald-option = $(success,$(LD) -v $(1)) 28