export define HELP_MENU_HEADER does not work on macOS

[AlekSi]

# help menu

export define HELP_MENU_HEADER
# Getting Started

To build this project, you must have the following installed:

Not sure why we use export define there, but it doesn't work on macOS with the default GNU Make 3.81:

$ make
Makefile:52: *** missing separator.  Stop.

Removing export helps.

[samip5]

That just means you're using too old Make. Install it from brew and it works.