Home | History | Annotate | Line # | Download | only in unit-tests 
      1 # $NetBSD: var-recursive.mk,v 1.12 2025/04/13 09:29:33 rillig Exp $
      2 #
      3 # Tests for expressions that refer to themselves and thus cannot be
      4 # evaluated, as that would lead to an endless loop.
      5 
      6 .if make(loadtime)
      7 
      8 DIRECT=	${DIRECT}	# Defining a recursive variable is not an error.
      9 # expect+2: Variable DIRECT is recursive.
     10 # expect+1: <>
     11 .  info <${DIRECT}>	# But expanding such a variable is an error.
     12 
     13 
     14 # The chain of variables that refer to each other may be long.
     15 INDIRECT1=	${INDIRECT2}
     16 INDIRECT2=	${INDIRECT1}
     17 # expect+2: Variable INDIRECT1 is recursive.
     18 # expect+1: <>
     19 .  info <${INDIRECT1}>
     20 
     21 
     22 # The variable refers to itself, but only in the branch of a condition that
     23 # is not satisfied and is thus not evaluated.
     24 CONDITIONAL=	${1:?ok:${CONDITIONAL}}
     25 # expect+1: <ok>
     26 .  info <${CONDITIONAL}>
     27 
     28 
     29 # An expression with modifiers is skipped halfway.  This can lead to wrong
     30 # follow-up error messages, but recursive variables occur seldom.
     31 MODIFIERS=	${MODIFIERS:Mpattern}
     32 # expect+2: Variable MODIFIERS is recursive.
     33 # expect+1: <Mpattern}>
     34 .  info <${MODIFIERS}>
     35 
     36 
     37 # Short variable names can be expanded using the short-hand $V notation,
     38 # which takes a different code path in Var_Parse for parsing the variable
     39 # name.  Ensure that these are checked as well.
     40 V=	$V
     41 # expect+2: Variable V is recursive.
     42 # expect+1: <>
     43 .  info <$V>
     44 
     45 .elif make(runtime)
     46 
     47 VAR=	${VAR}
     48 runtime:
     49 # expect: : before-recursive
     50 	: before-recursive
     51 # expect: make: Variable VAR is recursive.
     52 # expect-not-matches: ^: recursive%-line%-before
     53 # expect-not-matches: ^: recursive%-line%-after
     54 	: recursive-line-before <${VAR}> recursive-line-after
     55 # expect-not-matches: ^: after%-recursive
     56 	: after-recursive
     57 
     58 .else
     59 
     60 all:
     61 	@${MAKE} -f ${MAKEFILE} loadtime || echo "sub-exit status $$?"
     62 	@${MAKE} -f ${MAKEFILE} runtime || echo "sub-exit status $$?"
     63 
     64 .endif
     65