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kbuild: add machine size to CHECKFLAGS

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By default, sparse assumes a 64bit machine when compiled on x86-64
and 32bit when compiled on anything else.

This can of course create all sort of problems for the other archs, like
issuing false warnings ('shift too big (32) for type unsigned long'), or
worse, failing to emit legitimate warnings.

Fix this by adding the -m32/-m64 flag, depending on CONFIG_64BIT,
to CHECKFLAGS in the main Makefile (and so for all archs).
Also, remove the now unneeded -m32/-m64 in arch specific Makefiles.

Signed-off-by: Luc Van Oostenryck <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
This commit is contained in:
Luc Van Oostenryck 2018-05-30 22:48:38 +02:00 • committed by Masahiro Yamada
commit 1f2f01b122
9 changed files with 10 additions and 10 deletions
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3
Makefile
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@ -877,6 +877,9 @@ endif
# insure the checker run with the right endianness
CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
# the checker needs the correct machine size
CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
# Default kernel image to build when no specific target is given.
# KBUILD_IMAGE may be overruled on the command line or
# set in the environment