Install, standard Linux

There are many Linux distributions (distros). The VAM installation procedure is the same in all: download the source, untar it, 'make' it.

The trick is that 'make' will require that some fairly standard tools are already installed, and doing so is a little different in each distro.

The tool you use to install the other tools is always preinstalled, but it's not the same in every distro.
The best way I've found to resolve this is to ask Google "how do I install xxx in yyy linux", xxx being the name of the tool and yyy being the name of the linux distro. For example "how do I install d2u in debian linux" - when I just tried it told me (in many more words) to type "sudo apt install dos2unix".

With that in mind you can restart 'make' and deal with missing prereqs as they are found. Don't be surprised if 'make' itself is one if them, in which case "sudo apt install make" (or whatever in your selected distro) then start make again. And so on.

One wrinkle: sometimes packages come in two flavors, executables & development, and you probably need both. For example 'ncurses' might have an 'ncurses' package and an 'ncurses-dev' package. While -dev is a common suffix for development -devel is also about as common. Also, sometimes the necessary package isn't named like the thing the make is complaining about, but google will usually point you to the right one.

Continue the iterative process until you run out of errors.

NOTE: only one makefile is supplied in the am100 folder, but there are several in the am1200 folder.

makefile - for a normal Linux install, a copy of makefile-normal.
makefile-mac - for a macos install. To use it "cp makefile-mac makefile".
makefile-termux - for a termux install. To use it "cp makefile-termux makefile".

ALSO NOTE: leave makefile-normal alone - it's your backup when you cp something else to makefile.