(autoconf.info)Cache Variable Names
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7.4.1 Cache Variable Names
The names of cache variables should have the following format:
for example, `ac_cv_header_stat_broken' or
`ac_cv_prog_gcc_traditional'. The parts of the variable name are:
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'.
Indicates that this shell variable is a cache value. This string
_must_ be present in the variable name, including the leading
A convention for classifying cache values, to produce a rational
naming system. The values used in Autoconf are listed in *Note
Which member of the class of cache values this test applies to.
For example, which function (`alloca'), program (`gcc'), or output
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 are Boolean (`yes' or `no') or the names of files
or functions; so this is not an important restriction.
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