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      1  1.4  rillig # $NetBSD: suff-transform-endless.mk,v 1.4 2020/11/23 14:47:12 rillig Exp $
      2  1.1  rillig 
      3  1.1  rillig # https://gnats.netbsd.org/49086, issue 6:
      4  1.1  rillig # Transformation search can end up in an infinite loop.
      5  1.1  rillig #
      6  1.1  rillig # There is no file or target from which issue6.f could be made, so
      7  1.1  rillig # this should fail.  The bug is that because rules .e.f, .d.e and .e.d
      8  1.1  rillig # exist, make would try to make .f from .e and then infinitely try
      9  1.1  rillig # to do .e from .d and vice versa.
     10  1.1  rillig 
     11  1.3  rillig .MAKEFLAGS: -ds
     12  1.3  rillig 
     13  1.1  rillig all: issue6.f
     14  1.1  rillig 
     15  1.1  rillig .c.d .d.c .d .d.e .e.d:
     16  1.1  rillig 	: 'Making ${.TARGET} from ${.IMPSRC}.'
     17  1.1  rillig 
     18  1.1  rillig .SUFFIXES: .c .d .e .f
     19  1.1  rillig 
     20  1.1  rillig .e .e.f .f.e:
     21  1.2  rillig 	: 'Making ${.TARGET} from ${.IMPSRC}.'
     22  1.1  rillig 
     23  1.1  rillig # XXX: As of 2020-10-20, the result is unexpected.
     24  1.1  rillig # XXX: .d.c is not a transformation rule.
     25  1.1  rillig # XXX: .d is not a transformation rule.
     26  1.1  rillig # XXX: .e.d is not a transformation rule.
     27  1.1  rillig # XXX: .c.d is listed as "Files that are only sources".
     28  1.1  rillig # XXX: .d.e is listed as "Files that are only sources".
     29  1.1  rillig # XXX: The suffixes .d and .f both have the number 3.
     30  1.1  rillig # XXX: .c.d is not listed as "Transformations".
     31  1.1  rillig # XXX: .d.c is not listed as "Transformations".
     32  1.1  rillig # XXX: .d is not listed as "Transformations".
     33  1.1  rillig # XXX: .d.e is not listed as "Transformations".
     34  1.1  rillig # XXX: .e.d is not listed as "Transformations".
     35  1.1  rillig # XXX: Found 'all' as '(not found)'
     36  1.1  rillig # XXX: trying all.e, all.e, all.f, all.e, all.e, repeatedly.
     37  1.1  rillig #.MAKEFLAGS: -dg1
     38  1.4  rillig 
     39  1.4  rillig # Before 24-11-2020, resolving all.e ran into an endless loop.
     40