makefile-runtime-macros-list

makefile-runtime-macros-list is a variable defined in `make-mode.el'.
Its value is shown below.

Documentation:
List of macros that are resolved by make at runtime.
If you insert a macro reference using `makefile-insert-macro-ref', the name
of the macro is checked against this list. If it can be found its name will
not be enclosed in { } or ( ).

You can customize this variable.

Value:

(("@")
 ("&")
 (">")
 ("<")
 ("*")
 ("^")
 ("+")
 ("?")
 ("%")
 ("$"))