5.20 define option (-D)
This is the "name to add to definition list" option.
This option has some usage constraints. It:
-
may appear an unlimited number of times.
The AutoGen define names are used for the following purposes:
-
Sections of the AutoGen definitions may be enabled or disabled
by using C-style #ifdef and #ifndef directives.
-
When defining a value for a name, you may specify the index
for a particular value. That index may be a literal value,
a define option or a value #define-d in the definitions themselves.
-
The name of a file may be prefixed with
$NAME/.
The $NAME part of the name string will be replaced with
the define-d value for NAME.
-
When AutoGen is finished loading the definitions, the defined values
are exported to the environment with,
putenv(3).
These values can then be used in shell scripts with ${NAME}
references and in templates with (getenv "NAME").
-
While processing a template, you may specify an index to retrieve
a specific value. That index may also be a define-d value.
This document was generated by Bruce Korb on September, 30 2006 using texi2html 1.76.
