That sentence does not occur in the documentation of the product, which
Todd pointed you at:
I don’t know what unofficial guide you’re following, but I concur with
Todd – start with the official instructions, and ask questions
(showing full error messages) when you run into problems following
those. We can’t help you if you’re following some other arbitrary set
of out-of-date and unofficial instructions.
It looks like the guide you’re following was trying to make you compile
MySQL by hand. This is probably unnecessary, as your Linux
distribution almost certainly provides a pre-built package of MySQL
that you can install.