1 1.12 rillig # $NetBSD: var-recursive.mk,v 1.12 2025/04/13 09:29:33 rillig Exp $ 2 1.1 rillig # 3 1.8 rillig # Tests for expressions that refer to themselves and thus cannot be 4 1.8 rillig # evaluated, as that would lead to an endless loop. 5 1.1 rillig 6 1.8 rillig .if make(loadtime) 7 1.1 rillig 8 1.8 rillig DIRECT= ${DIRECT} # Defining a recursive variable is not an error. 9 1.10 rillig # expect+2: Variable DIRECT is recursive. 10 1.8 rillig # expect+1: <> 11 1.8 rillig . info <${DIRECT}> # But expanding such a variable is an error. 12 1.1 rillig 13 1.1 rillig 14 1.1 rillig # The chain of variables that refer to each other may be long. 15 1.1 rillig INDIRECT1= ${INDIRECT2} 16 1.1 rillig INDIRECT2= ${INDIRECT1} 17 1.10 rillig # expect+2: Variable INDIRECT1 is recursive. 18 1.8 rillig # expect+1: <> 19 1.8 rillig . info <${INDIRECT1}> 20 1.1 rillig 21 1.1 rillig 22 1.1 rillig # The variable refers to itself, but only in the branch of a condition that 23 1.8 rillig # is not satisfied and is thus not evaluated. 24 1.1 rillig CONDITIONAL= ${1:?ok:${CONDITIONAL}} 25 1.8 rillig # expect+1: <ok> 26 1.8 rillig . info <${CONDITIONAL}> 27 1.8 rillig 28 1.8 rillig 29 1.8 rillig # An expression with modifiers is skipped halfway. This can lead to wrong 30 1.8 rillig # follow-up error messages, but recursive variables occur seldom. 31 1.8 rillig MODIFIERS= ${MODIFIERS:Mpattern} 32 1.10 rillig # expect+2: Variable MODIFIERS is recursive. 33 1.8 rillig # expect+1: <Mpattern}> 34 1.8 rillig . info <${MODIFIERS}> 35 1.1 rillig 36 1.2 rillig 37 1.2 rillig # Short variable names can be expanded using the short-hand $V notation, 38 1.2 rillig # which takes a different code path in Var_Parse for parsing the variable 39 1.2 rillig # name. Ensure that these are checked as well. 40 1.2 rillig V= $V 41 1.10 rillig # expect+2: Variable V is recursive. 42 1.8 rillig # expect+1: <> 43 1.8 rillig . info <$V> 44 1.2 rillig 45 1.8 rillig .elif make(runtime) 46 1.3 rillig 47 1.3 rillig VAR= ${VAR} 48 1.8 rillig runtime: 49 1.9 rillig # expect: : before-recursive 50 1.9 rillig : before-recursive 51 1.10 rillig # expect: make: Variable VAR is recursive. 52 1.12 rillig # expect-not-matches: ^: recursive%-line%-before 53 1.12 rillig # expect-not-matches: ^: recursive%-line%-after 54 1.9 rillig : recursive-line-before <${VAR}> recursive-line-after 55 1.12 rillig # expect-not-matches: ^: after%-recursive 56 1.9 rillig : after-recursive 57 1.3 rillig 58 1.1 rillig .else 59 1.1 rillig 60 1.1 rillig all: 61 1.8 rillig @${MAKE} -f ${MAKEFILE} loadtime || echo "sub-exit status $$?" 62 1.8 rillig @${MAKE} -f ${MAKEFILE} runtime || echo "sub-exit status $$?" 63 1.8 rillig 64 1.8 rillig .endif 65
Indexes created Sat Sep 20 22:09:52 GMT 2025