Cross compiling Go app with go-sqlite3 on Docker

Part of my Go app in my project, toolbox, using go-sqlite3. I spent couple of hours to setup cross compiling environment for this.

go-sqlite3 using CGO for binding sqlite3 to go library. That requires cross compilers for each target platform. First, I tried to setup mingw64, etc for each platform. But it was easy to implement if you are familiar with xgo.

xgo is a Docker images that pre configured for each Go version and target platforms. If you are using glide for packaging system. Prepare Dockerfile like below.

FROM karalabe/xgo-1.7.x

RUN apt-get update -y
RUN apt-get upgrade -y
RUN apt-get install -y zip git curl

ENV GOBIN=/usr/local/go/bin
ENV PATH=$PATH:/usr/local/go/bin
RUN curl https://glide.sh/get | sh

Then, just build with xgo command like below.

xgo --ldflags="$LD_FLAGS" -targets "windows/*,linux/*,darwin/*" github.com/watermint/toolbox/tools/$t