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(autocf21.info.gz) Changed Makefiles

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 13.2 Changed Makefiles
 ======================
 
 Add `@CFLAGS@', `@CPPFLAGS@', and `@LDFLAGS@' in your `Makefile.in'
 files, so they can take advantage of the values of those variables in
 the environment when `configure' is run.  Doing this isn't necessary,
 but it's a convenience for users.
 
    Also add `@configure_input@' in a comment to each non-`Makefile'
 input file for `AC_OUTPUT', so that the output files will contain a
 comment saying they were produced by `configure'.  Automatically
 selecting the right comment syntax for all the kinds of files that
 people call `AC_OUTPUT' on became too much work.
 
    Add `config.log' and `config.cache' to the list of files you remove
 in `distclean' targets.
 
    If you have the following in `Makefile.in':
 
      prefix = /usr/local
      exec_prefix = ${prefix}
 
 you must change it to:
 
      prefix = @prefix@
      exec_prefix = @exec_prefix@
 
 The old behavior of replacing those variables without `@' characters
 around them has been removed.
 
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