D58984.id184351.diff
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D58984.id184351.diff
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	diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
	--- a/sys/conf/kern.mk
	+++ b/sys/conf/kern.mk
	@@ -348,6 +348,17 @@
	CFLAGS+= -gdwarf-4
	.endif

	+#
	+# Per-file opt-in to Clang's -fbounds-safety. BOUNDS_SAFETY_FILES is a list
	+# of source basenames (e.g. tcp_ecn.c) to build with run-time bounds checking;
	+# it needs a toolchain that supports the extension (Apple's LLVM fork). Empty
	+# by default, in which case the annotations expand to nothing.
	+#
	+BOUNDS_SAFETY_FILES?=
	+.for _file in ${BOUNDS_SAFETY_FILES}
	+CFLAGS.${_file}+= -fbounds-safety
	+.endfor
	+
	CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${.IMPSRC:T}}
	CFLAGS+= ${CWARNFLAGS.${COMPILER_TYPE}}
	CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} ${CFLAGS.${.IMPSRC:T}}