40 lines
1.3 KiB
Makefile
40 lines
1.3 KiB
Makefile
# $NetBSD: suff-transform-endless.mk,v 1.4 2020/11/23 14:47:12 rillig Exp $
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# https://gnats.netbsd.org/49086, issue 6:
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# Transformation search can end up in an infinite loop.
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#
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# There is no file or target from which issue6.f could be made, so
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# this should fail. The bug is that because rules .e.f, .d.e and .e.d
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# exist, make would try to make .f from .e and then infinitely try
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# to do .e from .d and vice versa.
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.MAKEFLAGS: -ds
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all: issue6.f
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.c.d .d.c .d .d.e .e.d:
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: 'Making ${.TARGET} from ${.IMPSRC}.'
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.SUFFIXES: .c .d .e .f
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.e .e.f .f.e:
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: 'Making ${.TARGET} from ${.IMPSRC}.'
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# XXX: As of 2020-10-20, the result is unexpected.
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# XXX: .d.c is not a transformation rule.
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# XXX: .d is not a transformation rule.
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# XXX: .e.d is not a transformation rule.
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# XXX: .c.d is listed as "Files that are only sources".
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# XXX: .d.e is listed as "Files that are only sources".
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# XXX: The suffixes .d and .f both have the number 3.
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# XXX: .c.d is not listed as "Transformations".
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# XXX: .d.c is not listed as "Transformations".
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# XXX: .d is not listed as "Transformations".
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# XXX: .d.e is not listed as "Transformations".
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# XXX: .e.d is not listed as "Transformations".
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# XXX: Found 'all' as '(not found)'
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# XXX: trying all.e, all.e, all.f, all.e, all.e, repeatedly.
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#.MAKEFLAGS: -dg1
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# Before 24-11-2020, resolving all.e ran into an endless loop.
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