cperl-highlight-variables-indiscriminately

cperl-highlight-variables-indiscriminately is a variable defined in `cperl-mode.el'.
Its value is

nil

Documentation:
*Non-nil means perform additional highlighting on variables.
Currently only changes how scalar variables are highlighted.
Note that that variable is only read at initialization time for
the variable `cperl-font-lock-keywords-2', so changing it after you've
entered CPerl mode the first time will have no effect.

You can customize this variable.