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	# code for now.			# code for now.
	SANITIZER_CFLAGS+= -fsanitize=undefined			SANITIZER_CFLAGS+= -fsanitize=undefined
	SANITIZER_CFLAGS+= -fsanitize-recover=undefined			SANITIZER_CFLAGS+= -fsanitize-recover=undefined
	SANITIZER_LDFLAGS+= -fsanitize=undefined			SANITIZER_LDFLAGS+= -fsanitize=undefined
	_use_sanitizers= yes			_use_sanitizers= yes
	.endif # ${MK_UBSAN} == "yes"			.endif # ${MK_UBSAN} == "yes"

	.if !defined(BOOTSTRAPPING) && ${_use_sanitizers} != "no" && \			.if !defined(BOOTSTRAPPING) && ${_use_sanitizers} != "no" && \
	${COMPILER_TYPE} != "clang"			${COMPILER_TYPE} != "clang" && make(all)
	.error "Sanitizer instrumentation currently only supported with clang"			.error "Sanitizer instrumentation currently only supported with clang"
	.endif			.endif

	# For libraries we only instrument the shared and PIE libraries by setting			# For libraries we only instrument the shared and PIE libraries by setting
	# SHARED_CFLAGS instead of CFLAGS. We do this since static executables are not			# SHARED_CFLAGS instead of CFLAGS. We do this since static executables are not
	# compatible with the santizers (interceptors do not work).			# compatible with the santizers (interceptors do not work).
	.if ${_use_sanitizers} != "no"			.if ${_use_sanitizers} != "no"
	.include "../../lib/libclang_rt/compiler-rt-vars.mk"			.include "../../lib/libclang_rt/compiler-rt-vars.mk"
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