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      1 # $NetBSD: var-readonly.mk,v 1.4 2023/12/20 08:42:10 rillig Exp $
      2 
      3 # the answer
      4 N = 42
      5 .READONLY: N
      6 # this should be ignored
      7 N = 666
      8 .if ${N} != 42
      9 .error N ($N) should be 42
     10 .endif
     11 
     12 # undef should fail
     13 .MAKEFLAGS: -dv
     14 .undef N
     15 .ifndef N
     16 .error N should not be undef'd
     17 .endif
     18 .MAKEFLAGS: -d0
     19 
     20 .NOREADONLY: N
     21 # now we can change it
     22 N = 69
     23 .if ${N} == 42
     24 .error N should not be 42
     25 .endif
     26 
     27 all:
     28