Namespaces are used to separate different curves.

So for example to support both ED25519 and the NIST P256 curves, one
could import into a particular module both "amcl/ED25519" and "amcl/NIST256"

Separate ROM files provide the constants required for each curve. Some
files (BIG.go, FP.go, ECP.go) also specify certain constants 
that must be set for the particular curve.

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Make sure that the GOPATH environmental variable is set.

Then clone the AMCL repository by executing

go get github.com/milagro-crypto/amcl

Ignore the warning message about "no Go files"

This assumes that Git is installed on your machine - see 
https://git-scm.com/download/

Next navigate to $GOPATH/src/github.com/milagro-crypto/amcl/version3/go

To build the library and see it in action, execute the python3 
script config32.py or config64.py (depending om whether you want a 
32 or 64-bit build), and select the curves that you wish to support. 

As a quick example execute

py config64.py

or

python3 config64.py

Then select options 1, 3, 7, 18, 20, 25, 26 and 27 (these are fixed for the example 
program provided). Select 0 to exit.

Run the test program by executing

go run TestALL.go

The correct PIN is 1234

Next run the Benchmark program by executing

go run BenchtestALL.go