Build Go Programs Statically (10/9/20)

I always thought Go compiles program statically as long as we only use pure Go. So, in theory I could create an app, compile it, then run the executable binary anywhere without requiring any shared dependencies. However, several hours ago my app crashed in my server with following error :

/usr/local/go/pkg/tool/linux_amd64/6g: /lib64/ version `GLIBC_2.32' not found

So, this issue is happened because my Ubuntu LTS server still uses GLIBC 2.27 while my workstation is using rolling release distro (Manjaro) that already uses GLIBC 2.32. However, I was sure that my code doesn't use any cgo code, so this issue shouldn't happened.

After looking around, I found out that Go has two packages in the standard library that use cgo, i.e. os/user and net. To fix this, we can use osusergo and netgo build tags to skip building the cgo parts from those packages :

go build -tags "osusergo netgo"

For more details you might want to check blog post by Martin Tournoij (archived locally here). He explains in details why those packages uses cgo and how to statically link cgo package like SQLite.