22 lines
550 B
Makefile
22 lines
550 B
Makefile
# $NetBSD: depsrc-optional.mk,v 1.5 2020/11/08 10:33:47 rillig Exp $
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#
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# Tests for the special source .OPTIONAL in dependency declarations,
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# which ignores the target if make cannot find out how to create it.
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#
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# TODO: Describe practical use cases for this feature.
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all: important
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: ${.TARGET} is made.
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important: optional optional-cohort
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: ${.TARGET} is made.
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optional: .OPTIONAL
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: An optional leaf node is not executed.
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# See IsOODateRegular.
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optional-cohort:: .OPTIONAL
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: A leaf node using '::' is considered out-of-date.
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.MAKEFLAGS: -dm
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