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# $NetBSD: bug2.mk,v 1.1 2005/08/01 00:40:30 rillig Exp $
#
# This file demonstrates a subtle inconsistency that only occurs when an
# undefined variable is used in another, which is then quoted and copied
# by using the := assignment operator.
.undef UNDEFINED
# this variable references the undefined variable
UNDEF_REF= ${UNDEFINED}
# here the reference is quoted
VARS+= ${UNDEF_REF:Q}
# and the current value is assigned to another variable
VARS_VALUE:= ${VARS}
all:
@echo UNDEFINED=${UNDEFINED:Q}""
@echo UNDEF_REF=${UNDEF_REF:Q}""
@echo VARS=${VARS:Q}""
@echo VARS_VALUE=${VARS_VALUE:Q}""
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