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Commit f73b3cc3 authored by Josh Poimboeuf's avatar Josh Poimboeuf Committed by Ingo Molnar
Browse files

objtool: Clobber user CFLAGS variable 



If the build user has the CFLAGS variable set in their environment,
objtool blindly appends to it, which can cause unexpected behavior.

Clobber CFLAGS to ensure consistent objtool compilation behavior.

Reported-by: default avatarValdis Kletnieks <valdis.kletnieks@vt.edu>
Tested-by: default avatarValdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/83a276df209962e6058fcb6c615eef9d401c21bc.1567121311.git.jpoimboe@redhat.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent f74c2bb9

tools/objtool/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -35,7 +35,7 @@ INCLUDES := -I$(srctree)/tools/include \ 
	    -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \

	    -I$(srctree)/tools/objtool/arch/$(ARCH)/include

WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed

CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)

CFLAGS   := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)

LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)



# Allow old libelf to be used: