Dockerfile

FROM golang:1.12.1

WORKDIR /go/src/app

COPY . .

RUN apt-get update && apt-get install -y mingw-w64 libasound2-dev


ENV GO111MODULE=on
ENV CGO_ENABLED=1
ENV CC=/usr/bin/x86_64-w64-mingw32-gcc
ENV CXX=/usr/bin/x86_64-w64-mingw32-g++
ENV GOOS=windows
ENV GOARCH=amd64
ENV CGO_LDFLAGS="-lmingw32 -lSDL2"
ENV CGO_FLAGS="-D_REENTRANT"

# Windows build
RUN cp -r ./dist/SDL2-2.0.9/x86_64-w64-mingw32 /usr && \
    cp -r ./dist/SDL2-2.0.9/i686-w64-mingw32 /usr && \
    cp -r ./dist/SDL2_mixer-2.0.4/x86_64-w64-mingw32 /usr && \ 
    cp -r ./dist/SDL2_mixer-2.0.4/i686-w64-mingw32 /usr && \ 
    go build main.go

RUN ls -al main.exe

# Linux build
ENV CC=gcc
ENV CXX=
ENV CGO_LDFLAGS=
ENV CGO_FLAGS="-s -w"
ENV GOOS=linux
ENV GOARCH=amd64
RUN apt-get install -y libsdl2-dev libsdl2-mixer-dev
RUN go get -v github.com/veandco/go-sdl2/sdl@master && go build main.go

RUN ls -al .

# MacOS build
ENV CC=gcc
ENV CXX=
ENV CGO_LDFLAGS=
ENV CGO_FLAGS="-s -w"
ENV GOOS=darwin
ENV GOARCH=amd64
RUN go build -tags static main.go