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cache file name with spaces

From: George Sicherman
Subject: cache file name with spaces
Date: Mon, 24 Jul 2006 16:10:56 -0400

I am using autoconf 2.13 on a Cygwin system.  It is generating
configure files that contain this:

        if test -r "$cache_file"; then
          echo "loading cache $cache_file"
          . $cache_file
          echo "creating cache $cache_file"
          > $cache_file

If the name of the cache file contains spaces, the ">" case works.
The "." command interprets the variable $cache_file as multiple
words, treating the first word as a file name and the rest as

The fix is to write

        . "$cache_file"

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