(autocf21.info.gz) Cache Variable Names

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 6.3.1 Cache Variable Names
 --------------------------
 
 The names of cache variables should have the following format:
 
      PACKAGE-PREFIX_cv_VALUE-TYPE_SPECIFIC-VALUE[_ADDITIONAL-OPTIONS]
 
 for example, `ac_cv_header_stat_broken' or
 `ac_cv_prog_gcc_traditional'.  The parts of the variable name are:
 
 PACKAGE-PREFIX
      An abbreviation for your package or organization; the same prefix
      you begin local Autoconf macros with, except lowercase by
      convention.  For cache values used by the distributed Autoconf
      macros, this value is `ac'.
 
 `_cv_'
      Indicates that this shell variable is a cache value.
 
 VALUE-TYPE
      A convention for classifying cache values, to produce a rational
      naming system.  The values used in Autoconf are listed in 
      Macro Names.
 
 SPECIFIC-VALUE
      Which member of the class of cache values this test applies to.
      For example, which function (`alloca'), program (`gcc'), or output
      variable (`INSTALL').
 
 ADDITIONAL-OPTIONS
      Any particular behavior of the specific member that this test
      applies to.  For example, `broken' or `set'.  This part of the
      name may be omitted if it does not apply.
 
    The values assigned to cache variables may not contain newlines.
 Usually, their values will be boolean (`yes' or `no') or the names of
 files or functions; so this is not an important restriction.

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