157fd251cSMasahiro Yamada# SPDX-License-Identifier: GPL-2.0-only 257fd251cSMasahiro Yamada 357fd251cSMasahiro Yamada# cc-cross-prefix 457fd251cSMasahiro Yamada# Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-) 557fd251cSMasahiro Yamada# Return first <prefix> where a <prefix>gcc is found in PATH. 657fd251cSMasahiro Yamada# If no gcc found in PATH with listed prefixes return nothing 757fd251cSMasahiro Yamada# 857fd251cSMasahiro Yamada# Note: '2>/dev/null' is here to force Make to invoke a shell. Otherwise, it 957fd251cSMasahiro Yamada# would try to directly execute the shell builtin 'command'. This workaround 1057fd251cSMasahiro Yamada# should be kept for a long time since this issue was fixed only after the 1157fd251cSMasahiro Yamada# GNU Make 4.2.1 release. 1257fd251cSMasahiro Yamadacc-cross-prefix = $(firstword $(foreach c, $(1), \ 1357fd251cSMasahiro Yamada $(if $(shell command -v -- $(c)gcc 2>/dev/null), $(c)))) 1457fd251cSMasahiro Yamada 1557fd251cSMasahiro Yamada# output directory for tests below 1613b25489SMasahiro YamadaTMPOUT = .tmp_$$$$ 1757fd251cSMasahiro Yamada 1857fd251cSMasahiro Yamada# try-run 1957fd251cSMasahiro Yamada# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) 2057fd251cSMasahiro Yamada# Exit code chooses option. "$$TMP" serves as a temporary file and is 2157fd251cSMasahiro Yamada# automatically cleaned up. 2257fd251cSMasahiro Yamadatry-run = $(shell set -e; \ 2357fd251cSMasahiro Yamada TMP=$(TMPOUT)/tmp; \ 2457fd251cSMasahiro Yamada trap "rm -rf $(TMPOUT)" EXIT; \ 25dd298656SMasahiro Yamada mkdir -p $(TMPOUT); \ 2657fd251cSMasahiro Yamada if ($(1)) >/dev/null 2>&1; \ 2757fd251cSMasahiro Yamada then echo "$(2)"; \ 2857fd251cSMasahiro Yamada else echo "$(3)"; \ 2957fd251cSMasahiro Yamada fi) 3057fd251cSMasahiro Yamada 3157fd251cSMasahiro Yamada# as-option 32d5c8d6e0SNick Desaulniers# Usage: aflags-y += $(call as-option,-Wa$(comma)-isa=foo,) 3357fd251cSMasahiro Yamada 3457fd251cSMasahiro Yamadaas-option = $(call try-run,\ 3543fc0a99SNathan Chancellor $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(1) -c -x assembler-with-cpp /dev/null -o "$$TMP",$(1),$(2)) 3657fd251cSMasahiro Yamada 3757fd251cSMasahiro Yamada# as-instr 38d5c8d6e0SNick Desaulniers# Usage: aflags-y += $(call as-instr,instr,option1,option2) 3957fd251cSMasahiro Yamada 4057fd251cSMasahiro Yamadaas-instr = $(call try-run,\ 410ee695a4SNathan Chancellor printf "%b\n" "$(1)" | $(CC) -Werror $(CLANG_FLAGS) $(KBUILD_AFLAGS) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o "$$TMP" -,$(2),$(3)) 4257fd251cSMasahiro Yamada 4357fd251cSMasahiro Yamada# __cc-option 4457fd251cSMasahiro Yamada# Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586) 4557fd251cSMasahiro Yamada__cc-option = $(call try-run,\ 46550ccb17SLinus Torvalds $(1) -Werror $(2) $(3:-Wno-%=-W%) -c -x c /dev/null -o "$$TMP",$(3),$(4)) 4757fd251cSMasahiro Yamada 4857fd251cSMasahiro Yamada# cc-option 4957fd251cSMasahiro Yamada# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) 5057fd251cSMasahiro Yamada 5157fd251cSMasahiro Yamadacc-option = $(call __cc-option, $(CC),\ 5257fd251cSMasahiro Yamada $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2)) 5357fd251cSMasahiro Yamada 5457fd251cSMasahiro Yamada# cc-option-yn 5557fd251cSMasahiro Yamada# Usage: flag := $(call cc-option-yn,-march=winchip-c6) 56b55da847SMasahiro Yamadacc-option-yn = $(if $(call cc-option,$1),y,n) 5757fd251cSMasahiro Yamada 5857fd251cSMasahiro Yamada# cc-disable-warning 5957fd251cSMasahiro Yamada# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable) 60550ccb17SLinus Torvaldscc-disable-warning = $(call cc-option,-Wno-$(strip $1)) 6157fd251cSMasahiro Yamada 6288b61e3bSNick Desaulniers# gcc-min-version 63*118c40b7SArnd Bergmann# Usage: cflags-$(call gcc-min-version, 110100) += -foo 64fccb3d3eSMasahiro Yamadagcc-min-version = $(call test-ge, $(CONFIG_GCC_VERSION), $1) 6588b61e3bSNick Desaulniers 6688b61e3bSNick Desaulniers# clang-min-version 6788b61e3bSNick Desaulniers# Usage: cflags-$(call clang-min-version, 110000) += -foo 68fccb3d3eSMasahiro Yamadaclang-min-version = $(call test-ge, $(CONFIG_CLANG_VERSION), $1) 6957fd251cSMasahiro Yamada 70ac954145SMiguel Ojeda# rustc-min-version 71ac954145SMiguel Ojeda# Usage: rustc-$(call rustc-min-version, 108500) += -Cfoo 72ac954145SMiguel Ojedarustc-min-version = $(call test-ge, $(CONFIG_RUSTC_VERSION), $1) 73ac954145SMiguel Ojeda 7457fd251cSMasahiro Yamada# ld-option 7557fd251cSMasahiro Yamada# Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y) 7657fd251cSMasahiro Yamadald-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3)) 77c4229743SMatthew Maurer 78c4229743SMatthew Maurer# __rustc-option 79c4229743SMatthew Maurer# Usage: MY_RUSTFLAGS += $(call __rustc-option,$(RUSTC),$(MY_RUSTFLAGS),-Cinstrument-coverage,-Zinstrument-coverage) 80e72a076cSAlice Ryhl# TODO: remove RUSTC_BOOTSTRAP=1 when we raise the minimum GNU Make version to 4.4 81c4229743SMatthew Maurer__rustc-option = $(call try-run,\ 821c4494c1SMiguel Ojeda echo '$(pound)![allow(missing_docs)]$(pound)![feature(no_core)]$(pound)![no_core]' | RUSTC_BOOTSTRAP=1\ 8346e24a54SMiguel Ojeda $(1) --sysroot=/dev/null $(filter-out --sysroot=/dev/null --target=%,$(2)) $(3)\ 84e72a076cSAlice Ryhl --crate-type=rlib --out-dir=$(TMPOUT) --emit=obj=- - >/dev/null,$(3),$(4)) 85c4229743SMatthew Maurer 86c4229743SMatthew Maurer# rustc-option 87c4229743SMatthew Maurer# Usage: rustflags-y += $(call rustc-option,-Cinstrument-coverage,-Zinstrument-coverage) 88c4229743SMatthew Maurerrustc-option = $(call __rustc-option, $(RUSTC),\ 89c4229743SMatthew Maurer $(KBUILD_RUSTFLAGS),$(1),$(2)) 90c4229743SMatthew Maurer 91c4229743SMatthew Maurer# rustc-option-yn 92c4229743SMatthew Maurer# Usage: flag := $(call rustc-option-yn,-Cinstrument-coverage) 93b55da847SMasahiro Yamadarustc-option-yn = $(if $(call rustc-option,$1),y,n) 94