GNU `make'

Node:Value Function, Next:Eval Function, Previous:Call Function, Up:Functions

### 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 (see Eval Function).