Makefile: Convert -Wimplicit-fallthrough=3 to just -Wimplicit-fallthrough for clang
A compilation -Wimplicit-fallthrough warning was enabled by commit
a035d552a9
("Makefile: Globally enable fall-through warning")
Even though clang 10.0.0 does not currently support this warning without
a patch, clang currently does not support a value for this option.
Link: https://bugs.llvm.org/show_bug.cgi?id=39382
The gcc default for this warning is 3 so removing the =3 has no effect
for gcc and enables the warning for patched versions of clang.
Also remove the =3 from an existing use in a parisc Makefile:
arch/parisc/math-emu/Makefile
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-and-tested-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
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2
Makefile
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Makefile
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@ -846,7 +846,7 @@ NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
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KBUILD_CFLAGS += -Wdeclaration-after-statement
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# Warn about unmarked fall-throughs in switch statement.
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KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=3,)
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KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
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# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
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KBUILD_CFLAGS += -Wvla
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@ -18,4 +18,4 @@ obj-y := frnd.o driver.o decode_exc.o fpudispatch.o denormal.o \
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# other very old or stripped-down PA-RISC CPUs -- not currently supported
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obj-$(CONFIG_MATH_EMULATION) += unimplemented-math-emulation.o
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CFLAGS_REMOVE_fpudispatch.o = -Wimplicit-fallthrough=3
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CFLAGS_REMOVE_fpudispatch.o = -Wimplicit-fallthrough
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