How to reduce binary file size when build from source?

What is the problem you are having with rclone?

I want to reduce binary size when build from source.

Current i got a 98MB binary when run go install, which is near 2x than official release.

Then i try cd rclone && make , got a 65MB binary file , which is still a little big.

I found the difference between mine and officical release is go/linking: dynamic, official release is go/linking: static

Any suggestions are appreciated.

followed document : Install

Run the command 'rclone version' and share the full output of the command.

rclone v1.63.1

  • os/version: ubuntu 23.04 (64 bit)
  • os/kernel: 6.2.0-26-generic (x86_64)
  • os/type: linux
  • os/arch: amd64
  • go/version: go1.20.7
  • go/linking: dynamic
  • go/tags: none

by default it contains all debug symbols.

I guess you do not need them in your "release"

go build -ldflags="-s -w"

I just executed these commands, and it seems to have helped a bit.

But file size still remain 63MB. The current official file size is 50MB.

There are some other optimisations included in the official release. Maybe it is good idea to document how to build official release version.

1 Like

what about:

go build -trimpath -ldflags="-s -w" 

62 MB after add ‘-trimpath'

have a look around GitHub - rclone/rclone: "rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Yandex Files release build scripts should be somewhere around.

Before i post this topic i looked through the official GitHub Action YAML file and didn't find any special tricks.

Maybe i am missed something.

Let's see maybe somebody else can point us into right direction


Thank you very much for your reply !

There are some docs here:

Try this

CGO_ENABLED=0 go build -ldflags="-s"

It should get you most of the way there

Note that if you want to reduce binary size further, comment out backends in backend/all/all.go that you don't need and commands in cmd/all/all.go

1 Like

This works! binary file size now same as officical.
Thank you !

1 Like

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.