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posix-expansion.mk revision 1.2 
      1 # $NetBSD: posix-expansion.mk,v 1.2 2025/04/13 09:34:43 rillig Exp $
      2 #
      3 # https://pubs.opengroup.org/onlinepubs/9799919799/utilities/make.html#tag_20_76_13_05
      4 #
      5 # In POSIX mode, when expanding an expression containing modifiers, the
      6 # modifiers specified in POSIX take precedence over the BSD-style modifiers.
      7 
      8 .POSIX:
      9 
     10 
     11 MOD_SUBST=	S s from to
     12 # The modifier contains a "=" and is thus the POSIX modifier.
     13 .if ${MOD_SUBST:S=from=to=} != "from=to= s from to"
     14 .  error
     15 .endif
     16 # The modifier does not contain a "=" and thus falls back to the BSD modifier.
     17 .if ${MOD_SUBST:S,from,to,} != "S s to to"
     18 .  error
     19 .endif
     20 
     21 
     22 all:
     23