opt-debug-var.mk revision 1.5
1 # $NetBSD: opt-debug-var.mk,v 1.5 2025/01/11 21:21:33 rillig Exp $ 2 # 3 # Tests for the -dv command line option, which adds debug logging about 4 # variable assignment and evaluation. 5 6 .MAKEFLAGS: -dv 7 8 # expect: Global: ASSIGNED = value 9 ASSIGNED= value 10 11 # TODO: Explain why the empty assignment "Global: SUBST = " is needed. 12 # expect: Global: SUBST = # (empty) 13 # expect: Global: SUBST = value 14 SUBST:= value 15 16 .if defined(ASSIGNED) 17 .endif 18 19 # The usual form of expressions is ${VAR}. The form $(VAR) is used 20 # less often as it can be visually confused with the shell construct for 21 # capturing the output of a subshell, which looks the same. 22 # 23 # In conditions, a call to the function 'empty' is syntactically similar to 24 # the form $(VAR), only that the initial '$' is the 'y' of 'empty'. 25 # 26 # expect: Var_Parse: y(ASSIGNED) (eval) 27 .if !empty(ASSIGNED) 28 .endif 29 30 31 # An expression for a variable with a single-character ordinary name. 32 # expect: Var_Parse: $U (eval-defined-loud) 33 # expect+1: Variable "U" is undefined 34 .if $U 35 .endif 36 37 # An expression for a target-specific variable with a single-character name. 38 # expect: Var_Parse: $< (eval-defined-loud) 39 # expect+1: Variable "<" is undefined 40 .if $< 41 .endif 42 43 44 .MAKEFLAGS: -d0 45
Indexes created Mon Sep 29 18:09:42 GMT 2025