1 - Run make build 2 - Run ./main 3 - "Hello Dummy" is displayed to "stdout"

Run make build and then ./main to see Rust + Golang in action. You should see Hello John Smith! printed to stdout.

|___include -----------C header files
|
|___lib     -----------generated artifact file (.a for static, .so for dynamic)
|
|___rustcode-----------rust libraries
       |
       |___hello-------a rust crate

Then, you need to create a C header file for your library. Just copy the libc types that you used.

All that is left to do is to add some cgo-specific comments to your Golang code. These comments tell cgo where to find the library and its headers.

/*
#cgo LDFLAGS: -L./lib -lhello
#include "./lib/hello.h"
*/
import "C"

There should not be a newline between */ and import "C".

A simple make build (use the Makefile in this repository) will result in a binary that loads your dynamic library.

cgo
Rust's FFI capabilities Creating a Rust dynamic library by Andrew Oppenlander.