30 lines
1.1 KiB
Makefile
30 lines
1.1 KiB
Makefile
# $NetBSD: deptgt-main.mk,v 1.4 2022/01/23 21:48:59 rillig Exp $
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#
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# Tests for the special target .MAIN in dependency declarations, which defines
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# the main target. This main target is built if no target has been specified
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# on the command line or via MAKEFLAGS.
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# The first target becomes the main target by default. It can be overridden
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# though.
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all: .PHONY
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@echo 'This target is not made.'
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# This target is not the first to be defined, but it lists '.MAIN' as one of
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# its sources. The word '.MAIN' only has a special meaning when it appears as
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# a _target_ in a dependency declaration, not as a _source_. It is thus
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# ignored.
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depsrc-main: .PHONY .MAIN
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@echo 'This target is not made either.'
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# This target is the first to be marked with '.MAIN', so it replaces the
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# previous main target, which was 'all'.
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.MAIN: real-main
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real-main: .PHONY
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@echo 'This target ${.TARGET} is the one that is made.'
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# This target is marked with '.MAIN' but there already is a main target. The
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# attribute '.MAIN' is thus ignored.
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.MAIN: too-late
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too-late: .PHONY
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@echo 'This target comes too late, there is already a .MAIN target.'
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