Consider striping and omitting DWARF in Go packages

[cstrahan]

When building go packages, we might want to make it an option to pass -ldflags="-s -w".

Per the Go docs:

-s
    Omit the symbol table and debug information.
-w
    Omit the DWARF symbol table.

See the following for more details:

• https://golang.org/cmd/link/
• https://blog.filippo.io/shrink-your-go-binaries-with-this-one-weird-trick/
• https://news.ycombinator.com/item?id=11515612

[cstrahan]

Regarding -w, that should just strip the debugging symbols, leaving enough for readable panic info. Also, we shouldn't forget to do this when building go itself (e.g. go build -ldflags="-s -w" cmd/go), which supposedly can drop the size down to ~9.0MB from ~12.5MB.

[Mathnerd314]

The normal strip utility is already run in fixupPhase, so they're partially stripped already (although maybe not: #14824), but perhaps the Go tools can strip it more. It would be nice to have numbers on some Go packages in Nix.

[Profpatsch]

triage: fixed?

[stale]

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