How to build the source

[wyatt-wong]

How to build the source into binary ? The Makefile refers to some non-existent head.mk and tail.mk files

And in the Makefile, the following 2 lines should be revised as follows:

Existing version

# http://cc65.github.io/cc65/doc/apple2.html#s4
# http://cc65.github.io/cc65/doc/apple2enh.html#s4

New Version

# http://cc65.github.io//doc/apple2.html#s4
# http://cc65.github.io//doc/apple2enh.html#s4