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varmod-exclam-shell.mk revision 1.3 
      1 # $NetBSD: varmod-exclam-shell.mk,v 1.3 2020/10/24 08:46:08 rillig Exp $
      2 #
      3 # Tests for the :!cmd! variable modifier.
      4 
      5 .if ${:!echo hello | tr 'l' 'l'!} != "hello"
      6 .  warning unexpected
      7 .endif
      8 
      9 # The output is truncated at the first null byte.
     10 # Cmd_Exec returns only a string pointer without length information.
     11 .if ${:!echo hello | tr 'l' '\0'!} != "he"
     12 .  warning unexpected
     13 .endif
     14 
     15 .if ${:!echo!} != ""
     16 .  warning A newline at the end of the output must be stripped.
     17 .endif
     18 
     19 .if ${:!echo;echo!} != " "
     20 .  warning Only a single newline at the end of the output is stripped.
     21 .endif
     22 
     23 .if ${:!echo;echo;echo;echo!} != "   "
     24 .  warning Other newlines in the output are converted to spaces.
     25 .endif
     26 
     27 all:
     28 	@:;
     29