Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'kbuild-fixes-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- remove unused cc-ldoption
- do not check the name uniquness of builtin modules to avoid false
positives
* tag 'kbuild-fixes-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: do not check name uniqueness of builtin modules
kbuild: drop support for cc-ldoption
+3
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Documentation/kbuild/makefiles.txt
-14
Documentation/kbuild/makefiles.txt
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The second argument is optional, and if supplied will be used
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if first argument is not supported.
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cc-ldoption
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cc-ldoption is used to check if $(CC) when used to link object files
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supports the given option. An optional second option may be
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specified if first option are not supported.
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Example:
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#arch/x86/kernel/Makefile
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vsyscall-flags += $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
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In the above example, vsyscall-flags will be assigned the option
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-Wl$(comma)--hash-style=sysv if it is supported by $(CC).
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The second argument is optional, and if supplied will be used
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if first argument is not supported.
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as-instr
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as-instr checks if the assembler reports a specific instruction
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and then outputs either option1 or option2
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scripts/Kbuild.include
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scripts/Kbuild.include
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# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
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cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) || echo $(4))
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# cc-ldoption
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# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
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cc-ldoption = $(call try-run,\
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$(CC) $(1) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
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-
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# ld-option
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# Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
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ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3))
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scripts/modules-check.sh
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scripts/modules-check.sh
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# Check uniqueness of module names
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check_same_name_modules()
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{
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for m in $(sed 's:.*/::' modules.order modules.builtin | sort | uniq -d)
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for m in $(sed 's:.*/::' modules.order | sort | uniq -d)
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do
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echo "warning: same basename if the following are built as modules:" >&2
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sed "/\/$m/!d;s:^kernel/: :" modules.order modules.builtin >&2
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echo "warning: same module names found:" >&2
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sed -n "/\/$m/s:^kernel/: :p" modules.order >&2
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done
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}
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