(make.info.gz) Value Function

Info Catalog

(make.info.gz) Call Function

(make.info.gz) Functions

(make.info.gz) Eval Function

 
 8.7 The `value' Function
 ========================
 
 The `value' function provides a way for you to use the value of a
 variable _without_ having it expanded.  Please note that this does not
 undo expansions which have already occurred; for example if you create
 a simply expanded variable its value is expanded during the definition;
 in that case the `value' function will return the same result as using
 the variable directly.
 
    The syntax of the `value' function is:
 
      $(value VARIABLE)
 
    Note that VARIABLE is the _name_ of a variable; not a _reference_ to
 that variable.  Therefore you would not normally use a `$' or
 parentheses when writing it.  (You can, however, use a variable
 reference in the name if you want the name not to be a constant.)
 
    The result of this function is a string containing the value of
 VARIABLE, without any expansion occurring.  For example, in this
 makefile:
 
      FOO = $PATH
 
      all:
              @echo $(FOO)
              @echo $(value FOO)
 
 The first output line would be `ATH', since the "$P" would be expanded
 as a `make' variable, while the second output line would be the current
 value of your `$PATH' environment variable, since the `value' function
 avoided the expansion.
 
    The `value' function is most often used in conjunction with the
 `eval' function ( Eval Function).
 

Info Catalog

(make.info.gz) Call Function

(make.info.gz) Functions

(make.info.gz) Eval Function