1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 2e1cfdc0eSMasahiro Yamada# Kconfig helper macros 3e1cfdc0eSMasahiro Yamada 4e1cfdc0eSMasahiro Yamada# Convenient variables 5e1cfdc0eSMasahiro Yamadacomma := , 6e1cfdc0eSMasahiro Yamadaquote := " 7e1cfdc0eSMasahiro Yamadasquote := ' 8e1cfdc0eSMasahiro Yamadaempty := 9e1cfdc0eSMasahiro Yamadaspace := $(empty) $(empty) 10e1cfdc0eSMasahiro Yamadadollar := $ 11e1cfdc0eSMasahiro Yamadaright_paren := ) 12e1cfdc0eSMasahiro Yamadaleft_paren := ( 13e1cfdc0eSMasahiro Yamada 14e1cfdc0eSMasahiro Yamada# $(if-success,<command>,<then>,<else>) 15e1cfdc0eSMasahiro Yamada# Return <then> if <command> exits with 0, <else> otherwise. 16e1cfdc0eSMasahiro Yamadaif-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)") 17e1cfdc0eSMasahiro Yamada 18e1cfdc0eSMasahiro Yamada# $(success,<command>) 19e1cfdc0eSMasahiro Yamada# Return y if <command> exits with 0, n otherwise 20e1cfdc0eSMasahiro Yamadasuccess = $(if-success,$(1),y,n) 21e1cfdc0eSMasahiro Yamada 22902a6898SMasahiro Yamada# $(failure,<command>) 23902a6898SMasahiro Yamada# Return n if <command> exits with 0, y otherwise 24902a6898SMasahiro Yamadafailure = $(if-success,$(1),n,y) 25902a6898SMasahiro Yamada 26e1cfdc0eSMasahiro Yamada# $(cc-option,<flag>) 27e1cfdc0eSMasahiro Yamada# Return y if the compiler supports <flag>, n otherwise 28dd298656SMasahiro Yamadacc-option = $(success,trap "rm -rf .tmp_$$" EXIT; mkdir .tmp_$$; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$/tmp.o) 29e1cfdc0eSMasahiro Yamada 30e1cfdc0eSMasahiro Yamada# $(ld-option,<flag>) 31e1cfdc0eSMasahiro Yamada# Return y if the linker supports <flag>, n otherwise 32e1cfdc0eSMasahiro Yamadald-option = $(success,$(LD) -v $(1)) 3359f53855SMasahiro Yamada 3442d519e3SCatalin Marinas# $(as-instr,<instr>) 3542d519e3SCatalin Marinas# Return y if the assembler supports <instr>, n otherwise 36*c8cae1c1SMasahiro Yamadaas-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) $(2) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o /dev/null -) 37*c8cae1c1SMasahiro Yamadaas-instr64 = $(as-instr,$(1),$(m64-flag)) 3842d519e3SCatalin Marinas 39902a6898SMasahiro Yamada# check if $(CC) and $(LD) exist 402f7ab126SMiguel Ojeda$(error-if,$(failure,command -v $(CC)),C compiler '$(CC)' not found) 41902a6898SMasahiro Yamada$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found) 42902a6898SMasahiro Yamada 432f7ab126SMiguel Ojeda# Get the C compiler name, version, and error out if it is not supported. 44aec6c60aSMasahiro Yamadacc-info := $(shell,$(srctree)/scripts/cc-version.sh $(CC)) 452f7ab126SMiguel Ojeda$(error-if,$(success,test -z "$(cc-info)"),Sorry$(comma) this C compiler is not supported.) 46aec6c60aSMasahiro Yamadacc-name := $(shell,set -- $(cc-info) && echo $1) 47aec6c60aSMasahiro Yamadacc-version := $(shell,set -- $(cc-info) && echo $2) 48aec6c60aSMasahiro Yamada 49ba64beb1SMasahiro Yamada# Get the assembler name, version, and error out if it is not supported. 50ba64beb1SMasahiro Yamadaas-info := $(shell,$(srctree)/scripts/as-version.sh $(CC) $(CLANG_FLAGS)) 51ba64beb1SMasahiro Yamada$(error-if,$(success,test -z "$(as-info)"),Sorry$(comma) this assembler is not supported.) 52ba64beb1SMasahiro Yamadaas-name := $(shell,set -- $(as-info) && echo $1) 53ba64beb1SMasahiro Yamadaas-version := $(shell,set -- $(as-info) && echo $2) 54ba64beb1SMasahiro Yamada 5502aff859SMasahiro Yamada# Get the linker name, version, and error out if it is not supported. 5602aff859SMasahiro Yamadald-info := $(shell,$(srctree)/scripts/ld-version.sh $(LD)) 5702aff859SMasahiro Yamada$(error-if,$(success,test -z "$(ld-info)"),Sorry$(comma) this linker is not supported.) 5802aff859SMasahiro Yamadald-name := $(shell,set -- $(ld-info) && echo $1) 5902aff859SMasahiro Yamadald-version := $(shell,set -- $(ld-info) && echo $2) 6075959d44SThomas Gleixner 618cc4fd73SMasahiro Yamada# machine bit flags 628cc4fd73SMasahiro Yamada# $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise. 638cc4fd73SMasahiro Yamada# $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise. 648cc4fd73SMasahiro Yamadacc-option-bit = $(if-success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null,$(1)) 658cc4fd73SMasahiro Yamadam32-flag := $(cc-option-bit,-m32) 668cc4fd73SMasahiro Yamadam64-flag := $(cc-option-bit,-m64) 67