18 lines
536 B
Makefile
18 lines
536 B
Makefile
# $NetBSD: bug2.mk,v 1.2 2005/08/01 01:02:05 rillig Exp $
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#
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# This file demonstrates a subtle inconsistency that only occurs when an
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# undefined variable is used in another, which is then quoted and copied
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# by using the := assignment operator.
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.undef UNDEFINED
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# this variable references the undefined variable
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UNDEF_REF= ${UNDEFINED}
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# and the current value is assigned to another variable
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UNDEF_VALUE:= ${UNDEF_REF:Q}
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all:
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@echo UNDEFINED=${UNDEFINED:Q}""
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@echo UNDEF_REF=${UNDEF_REF:Q}""
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@echo UNDEF_VALUE=${UNDEF_VALUE:Q}""
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