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selftests: Use optional USERCFLAGS and USERLDFLAGS
commit de3ee3f634
upstream.
This change enables to extend CFLAGS and LDFLAGS from command line, e.g.
to extend compiler checks: make USERCFLAGS=-Werror USERLDFLAGS=-static
USERCFLAGS and USERLDFLAGS are documented in
Documentation/kbuild/makefiles.rst and Documentation/kbuild/kbuild.rst
This should be backported (down to 5.10) to improve previous kernel
versions testing as well.
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Link: https://lore.kernel.org/r/20220909103901.1503436-1-mic@digikod.net
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -123,6 +123,11 @@ endef
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clean:
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$(CLEAN)
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# Enables to extend CFLAGS and LDFLAGS from command line, e.g.
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# make USERCFLAGS=-Werror USERLDFLAGS=-static
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CFLAGS += $(USERCFLAGS)
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LDFLAGS += $(USERLDFLAGS)
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# When make O= with kselftest target from main level
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# the following aren't defined.
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#
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