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depsrc-optional.mk revision 1.4 
      1  1.4  rillig # $NetBSD: depsrc-optional.mk,v 1.4 2020/11/08 10:17:55 rillig Exp $
      2  1.1  rillig #
      3  1.3  rillig # Tests for the special source .OPTIONAL in dependency declarations,
      4  1.3  rillig # which ignores the target if make cannot find out how to create it.
      5  1.3  rillig #
      6  1.3  rillig # TODO: Describe practical use cases for this feature.
      7  1.3  rillig 
      8  1.3  rillig # TODO: Explain why the commands for "important" are not executed.
      9  1.3  rillig # I had thought that only the "optional" commands were skipped.
     10  1.3  rillig 
     11  1.3  rillig all: important
     12  1.3  rillig 	: ${.TARGET} is made.
     13  1.1  rillig 
     14  1.4  rillig important: optional optional-cohort
     15  1.3  rillig 	: ${.TARGET} is made.
     16  1.1  rillig 
     17  1.3  rillig optional: .OPTIONAL
     18  1.3  rillig 	: This is not executed.
     19  1.4  rillig 
     20  1.4  rillig # XXX: "non-existent and no sources" is wrong, should be ":: operator and
     21  1.4  rillig # no sources..." instead.
     22  1.4  rillig optional-cohort:: .OPTIONAL
     23  1.4  rillig 	: This is not executed.
     24  1.4  rillig 
     25  1.4  rillig .MAKEFLAGS: -dm
     26