1 1.1 rillig # $NetBSD: posix-varassign.mk,v 1.1 2025/04/13 09:29:33 rillig Exp $ 2 1.1 rillig # 3 1.1 rillig # https://pubs.opengroup.org/onlinepubs/9799919799/utilities/make.html#tag_20_76_13_05 4 1.1 rillig # 5 1.1 rillig # Test that variable assignments work in the same way as in default mode. 6 1.1 rillig # 7 1.1 rillig # The assignment operators "::=" and ":::=" are intentionally not supported, 8 1.1 rillig # as they would introduce the distinction between eagerly and lazily evaluated 9 1.1 rillig # macros, in addition to the eagerly and lazily evaluated assignments, and 10 1.1 rillig # this would add too much complexity to the user's mental model, for too 11 1.1 rillig # little benefit. 12 1.1 rillig 13 1.1 rillig .POSIX: 14 1.1 rillig 15 1.1 rillig 16 1.1 rillig VAR= value 17 1.1 rillig .if ${VAR} != "value" 18 1.1 rillig . error 19 1.1 rillig .endif 20 1.1 rillig 21 1.1 rillig 22 1.1 rillig # Deviation from POSIX: The "::=" assignment operator is not supported, 23 1.1 rillig # instead, the variable named "VAR:" is defined. 24 1.1 rillig VAR= before 25 1.1 rillig VAR::= posix-immediate-expansion 26 1.1 rillig .if ${VAR} != "before" 27 1.1 rillig . error 28 1.1 rillig .elif ${${:UVAR\:}} != "posix-immediate-expansion" 29 1.1 rillig . error 30 1.1 rillig .endif 31 1.1 rillig 32 1.1 rillig 33 1.1 rillig # Deviation from POSIX: The ":::=" assignment operator is not supported, 34 1.1 rillig # instead, the variable named "VAR::" is defined. 35 1.1 rillig VAR:::= posix-delayed-expansion 36 1.1 rillig .if ${VAR} != "before" 37 1.1 rillig . error 38 1.1 rillig .elif ${${:UVAR\:\:}} != "posix-delayed-expansion" 39 1.1 rillig . error 40 1.1 rillig .endif 41 1.1 rillig 42 1.1 rillig 43 1.1 rillig VAR!= echo from shell command 44 1.1 rillig .if ${VAR} != "from shell command" 45 1.1 rillig . error 46 1.1 rillig .endif 47 1.1 rillig 48 1.1 rillig 49 1.1 rillig VAR= value 50 1.1 rillig VAR?= fallback 51 1.1 rillig .if ${VAR} != "value" 52 1.1 rillig . error 53 1.1 rillig .endif 54 1.1 rillig .undef VAR 55 1.1 rillig VAR?= fallback 56 1.1 rillig .if ${VAR} != "fallback" 57 1.1 rillig . error 58 1.1 rillig .endif 59 1.1 rillig 60 1.1 rillig 61 1.1 rillig VAR= value 62 1.1 rillig VAR+= appended 63 1.1 rillig .if ${VAR} != "value appended" 64 1.1 rillig . error 65 1.1 rillig .endif 66 1.1 rillig 67 1.1 rillig 68 1.1 rillig # In POSIX mode, the ":=" assignment operator is available as well, even 69 1.1 rillig # though it is not specified by POSIX, due to the differences in existing 70 1.1 rillig # make implementations. 71 1.1 rillig REF= before 72 1.1 rillig VAR:= immediate ${REF} 73 1.1 rillig REF= after 74 1.1 rillig .if ${VAR} != "immediate before" 75 1.1 rillig . error 76 1.1 rillig .endif 77 1.1 rillig 78 1.1 rillig 79 1.1 rillig all: 80
Indexes created Sun Sep 21 20:09:37 GMT 2025