Makefile

include env
 
exe:
        go build main.go 
 
dll:
        go build -buildmode=c-shared -o main.dll main.go
 
clean:
        rm -f main.exe main.dll
 
all:    exe dll

env

cat env 
export GOOS=windows
#export GOARCH=amd64 
export CGO_ENABLED=1
export CXX=x86_64-w64-mingw32-g++
export CC= x86_64-w64-mingw32-gcc
export GOROOT=$(shell printenv HOME)/opt/go-legacy-win7/
export PATH = $(shell printenv HOME)/opt/go-legacy-win7/bin/go:$(shell printenv PATH)