I have a go app that runs via scheduled task on my Synology NAS DS218+. Compiling GO binaries for major platforms is fairly straight forward. Compiling GO binaries for Synology is a bit more involved. The following is what I've found to work.
First, install musl-cross.
$ brew install FiloSottile/musl-cross/musl-cross
Then run the following go build command.
$ CC=x86_64-linux-musl-gcc \\
CXX=x86_64-linux-musl-g++ \\
GOARCH=amd64 \\
GOOS=linux \\
CGO_ENABLED=1 \\
go build -ldflags "-linkmode external -extldflags -static"
Authored by Anthony Fox on 2020-04-22