D3898.id.diff
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	Index: head/share/mk/bsd.compiler.mk
	===================================================================
	--- head/share/mk/bsd.compiler.mk
	+++ head/share/mk/bsd.compiler.mk
	@@ -25,6 +25,18 @@
	.if !target(__<bsd.compiler.mk>__)
	__<bsd.compiler.mk>__:

	+# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make.
	+# The value is only used/exported for the same environment that impacts
	+# CC and COMPILER_* settings here.
	+_exported_vars= COMPILER_TYPE COMPILER_VERSION
	+_cc_hash= ${CC}${MACHINE}${PATH}
	+_cc_hash:= ${_cc_hash:hash}
	+.for var in ${_exported_vars}
	+.if defined(${var}.${_cc_hash})
	+${var}= ${${var}.${_cc_hash}}
	+.endif
	+.endfor
	+
	.if ${MACHINE} == "common"
	# common is a pseudo machine for architecture independent
	# generated files - thus there is no compiler.
	@@ -54,6 +66,14 @@
	.undef _v
	.endif

	+# Export the values so sub-makes don't have to look them up again, using the
	+# hash key computed above.
	+.for var in ${_exported_vars}
	+${var}.${_cc_hash}:= ${${var}}
	+.export-env ${var}.${_cc_hash}
	+.undef ${var}.${_cc_hash}
	+.endfor
	+
	.if ${COMPILER_TYPE} == "clang" \|\| \
	(${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 40800)
	COMPILER_FEATURES= c++11