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