1# Kconfig helper macros 2 3# Convenient variables 4comma := , 5quote := " 6squote := ' 7empty := 8space := $(empty) $(empty) 9dollar := $ 10right_paren := ) 11left_paren := ( 12 13# $(if-success,<command>,<then>,<else>) 14# Return <then> if <command> exits with 0, <else> otherwise. 15if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)") 16 17# $(success,<command>) 18# Return y if <command> exits with 0, n otherwise 19success = $(if-success,$(1),y,n) 20 21# $(cc-option,<flag>) 22# Return y if the compiler supports <flag>, n otherwise 23cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) 24 25# $(ld-option,<flag>) 26# Return y if the linker supports <flag>, n otherwise 27ld-option = $(success,$(LD) -v $(1)) 28 29# gcc version including patch level 30gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') 31