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 284d0831e8SMasahiro Yamadacc-option = $(success,mkdir .tmp_$$$$; trap "rm -rf .tmp_$$$$" EXIT; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$$$/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 3642d519e3SCatalin Marinasas-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -) 3742d519e3SCatalin Marinas 38902a6898SMasahiro Yamada# check if $(CC) and $(LD) exist 39902a6898SMasahiro Yamada$(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found) 40902a6898SMasahiro Yamada$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found) 41902a6898SMasahiro Yamada 42aec6c60aSMasahiro Yamada# Get the compiler name, version, and error out if it is not supported. 43aec6c60aSMasahiro Yamadacc-info := $(shell,$(srctree)/scripts/cc-version.sh $(CC)) 44aec6c60aSMasahiro Yamada$(error-if,$(success,test -z "$(cc-info)"),Sorry$(comma) this compiler is not supported.) 45aec6c60aSMasahiro Yamadacc-name := $(shell,set -- $(cc-info) && echo $1) 46aec6c60aSMasahiro Yamadacc-version := $(shell,set -- $(cc-info) && echo $2) 47aec6c60aSMasahiro Yamada 48*02aff859SMasahiro Yamada# Get the linker name, version, and error out if it is not supported. 49*02aff859SMasahiro Yamadald-info := $(shell,$(srctree)/scripts/ld-version.sh $(LD)) 50*02aff859SMasahiro Yamada$(error-if,$(success,test -z "$(ld-info)"),Sorry$(comma) this linker is not supported.) 51*02aff859SMasahiro Yamadald-name := $(shell,set -- $(ld-info) && echo $1) 52*02aff859SMasahiro Yamadald-version := $(shell,set -- $(ld-info) && echo $2) 5375959d44SThomas Gleixner 548cc4fd73SMasahiro Yamada# machine bit flags 558cc4fd73SMasahiro Yamada# $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise. 568cc4fd73SMasahiro Yamada# $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise. 578cc4fd73SMasahiro Yamadacc-option-bit = $(if-success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null,$(1)) 588cc4fd73SMasahiro Yamadam32-flag := $(cc-option-bit,-m32) 598cc4fd73SMasahiro Yamadam64-flag := $(cc-option-bit,-m64) 60