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kbuild: split cc-option and friends to scripts/Makefile.compiler
scripts/Kbuild.include is included everywhere, but macros such as cc-option are needed by build targets only. For example, when 'make clean' traverses the tree, it does not need to evaluate $(call cc-option,). Split cc-option, ld-option, etc. to scripts/Makefile.compiler, which is only included from the top Makefile and scripts/Makefile.build. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| # SPDX-License-Identifier: GPL-2.0-only | ||
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| # cc-cross-prefix | ||
| # Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-) | ||
| # Return first <prefix> where a <prefix>gcc is found in PATH. | ||
| # If no gcc found in PATH with listed prefixes return nothing | ||
| # | ||
| # Note: '2>/dev/null' is here to force Make to invoke a shell. Otherwise, it | ||
| # would try to directly execute the shell builtin 'command'. This workaround | ||
| # should be kept for a long time since this issue was fixed only after the | ||
| # GNU Make 4.2.1 release. | ||
| cc-cross-prefix = $(firstword $(foreach c, $(1), \ | ||
| $(if $(shell command -v -- $(c)gcc 2>/dev/null), $(c)))) | ||
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| # output directory for tests below | ||
| TMPOUT = $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_$$$$ | ||
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| # try-run | ||
| # Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) | ||
| # Exit code chooses option. "$$TMP" serves as a temporary file and is | ||
| # automatically cleaned up. | ||
| try-run = $(shell set -e; \ | ||
| TMP=$(TMPOUT)/tmp; \ | ||
| TMPO=$(TMPOUT)/tmp.o; \ | ||
| mkdir -p $(TMPOUT); \ | ||
| trap "rm -rf $(TMPOUT)" EXIT; \ | ||
| if ($(1)) >/dev/null 2>&1; \ | ||
| then echo "$(2)"; \ | ||
| else echo "$(3)"; \ | ||
| fi) | ||
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| # as-option | ||
| # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) | ||
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| as-option = $(call try-run,\ | ||
| $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2)) | ||
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| # as-instr | ||
| # Usage: cflags-y += $(call as-instr,instr,option1,option2) | ||
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| as-instr = $(call try-run,\ | ||
| printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3)) | ||
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| # __cc-option | ||
| # Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586) | ||
| __cc-option = $(call try-run,\ | ||
| $(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4)) | ||
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| # cc-option | ||
| # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) | ||
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| cc-option = $(call __cc-option, $(CC),\ | ||
| $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2)) | ||
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| # cc-option-yn | ||
| # Usage: flag := $(call cc-option-yn,-march=winchip-c6) | ||
| cc-option-yn = $(call try-run,\ | ||
| $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n) | ||
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| # cc-disable-warning | ||
| # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable) | ||
| cc-disable-warning = $(call try-run,\ | ||
| $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1))) | ||
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| # cc-ifversion | ||
| # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1) | ||
| cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) || echo $(4)) | ||
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| # ld-option | ||
| # Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y) | ||
| ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3)) | ||
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| # ld-ifversion | ||
| # Usage: $(call ld-ifversion, -ge, 22252, y) | ||
| ld-ifversion = $(shell [ $(CONFIG_LD_VERSION)0 $(1) $(2)0 ] && echo $(3) || echo $(4)) |