Compile static binaries for Go programs that leverage Cgo.

static_cgo.md

In order to compile a fully static binary when using Cgo you'll need to link in a C library like musl.

I find it convenient to have a Docker image ready for building these artifacts.

FROM golang
RUN wget https://musl.libc.org/releases/musl-1.2.5.tar.gz && \
   tar -xzf musl-1.2.5.tar.gz && \
   cd musl-1.2.5 && \
   ./configure --enable-static --disable-shared && \
   make && make install

Then to build your progam:

CGO_ENABLED=1 CC=/usr/local/musl/bin/musl-gcc go build --ldflags '-linkmode=external -extldflags=-static'

Command should be:

CGO_ENABLED=1 CC=musl-gcc go build --ldflags '-linkmode external -extldflags=-static'
                                              ^

It's also tar -zxf musl-1.2.0.tar.gz...

on ubuntu + golang 1.20

apt-get install -y --no-install-recommends musl-dev musl-tools
CGO_ENABLED=1 CC=musl-gcc go build --ldflags '-linkmode=external -extldflags=-static' -o binary_name ./