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# $NetBSD: var-readonly.mk,v 1.3 2023/06/19 15:37:48 sjg Exp $
# the answer
N = 42
.READONLY: N
# this should be ignored
N = 666
.if ${N} != 42
.error N ($N) should be 42
.endif
# undef should fail
.undef N
.ifndef N
.error N should not be undef'd
.endif
.NOREADONLY: N
# now we can change it
N = 69
.if ${N} == 42
.error N should not be 42
.endif
all:
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