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varmod-quote-dollar.mk revision 1.4 
      1 # $NetBSD: varmod-quote-dollar.mk,v 1.4 2022/05/08 10:14:40 rillig Exp $
      2 #
      3 # Tests for the :q variable modifier, which quotes the string for the shell
      4 # and doubles dollar signs, to prevent them from being interpreted by a
      5 # child process of make.
      6 
      7 # The newline and space characters at the beginning of this string are passed
      8 # to the child make.  When the child make parses the variable assignment, it
      9 # discards the leading space characters.
     10 ASCII_CHARS=	${.newline} !"\#$$%&'()*+,-./09:;<=>?@AZ[\]^_`az{|}~
     11 
     12 all:
     13 	@${MAKE} -r -f /dev/null \
     14 	    CHARS=${ASCII_CHARS:q} \
     15 	    TWICE=${ASCII_CHARS:q}${ASCII_CHARS:q} \
     16 	    -V CHARS \
     17 	    -V TWICE
     18