change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/scripts/Kconfig.include
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..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 # Kconfig helper macros
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 # Convenient variables
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@@ -18,13 +19,38 @@
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 # Return y if <command> exits with 0, n otherwise
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 success = $(if-success,$(1),y,n)
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+# $(failure,<command>)
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+# Return n if <command> exits with 0, y otherwise
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+failure = $(if-success,$(1),n,y)
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+
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 # $(cc-option,<flag>)
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 # Return y if the compiler supports <flag>, n otherwise
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-cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -S -x c /dev/null -o /dev/null)
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+cc-option = $(success,mkdir .tmp_$$$$; trap "rm -rf .tmp_$$$$" EXIT; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$$$/tmp.o)
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 # $(ld-option,<flag>)
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 # Return y if the linker supports <flag>, n otherwise
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 ld-option = $(success,$(LD) -v $(1))
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-# gcc version including patch level
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-gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//')
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+# $(as-instr,<instr>)
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+# Return y if the assembler supports <instr>, n otherwise
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+as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -)
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+
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+# check if $(CC) and $(LD) exist
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+$(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found)
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+$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found)
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+
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+# Fail if the linker is gold as it's not capable of linking the kernel proper
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+$(error-if,$(success, $(LD) -v | grep -q gold), gold linker '$(LD)' not supported)
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+
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+# Get the assembler name, version, and error out if it is not supported.
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+as-info := $(shell,$(srctree)/scripts/as-version.sh $(CC) $(CLANG_FLAGS))
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+$(error-if,$(success,test -z "$(as-info)"),Sorry$(comma) this assembler is not supported.)
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+as-name := $(shell,set -- $(as-info) && echo $1)
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+as-version := $(shell,set -- $(as-info) && echo $2)
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+
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+# machine bit flags
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+#  $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise.
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+#  $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise.
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+cc-option-bit = $(if-success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null,$(1))
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+m32-flag := $(cc-option-bit,-m32)
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+m64-flag := $(cc-option-bit,-m64)