Cross-compile to vendored x86_84, aarch64 (Raspberry Pi 4) (#1497)

## Issue Addressed

NA

## Proposed Changes

Adds support for using the [`cross`](https://github.com/rust-embedded/cross) project to produce cross-compiled binaries using Docker images.

Provides quite clean and simple cross-compiles cause all the complexity is hidden in Dockerfiles. It does require you to be in the `docker` group though.

## Details

- Adds shortcut commands to `Makefile`
- Ensures `reqwest` and `discv5` use vendored openssl libs (i.e., static not shared).
- Switches to a [commit](https://github.com/sigp/blst/commit/284f7059642851c760a09fb1708bcb59c7ca323c) of blst that has a renamed C function to avoid a collision with openssl (upstream issue: https://github.com/supranational/blst/issues/21).
- Updates `ring` to the latest satisfiable version, since an earlier version was causing issues with `cross`.
- Off-topic, but adds extra message about Windows support as suggested by Discord user.

## Additional Info

- ~~Blocked on #1495~~
- There are no tests in CI for this yet for a few reasons:
  - I'm hesitant to add more long-running tasks.
  - Short-term bitrot should be avoided since we'll use it each release.
  - In the long term I think it would be good to automate binary creation on a release.
- I observed the binaries increase in size from 50mb to 52mb after these changes.

This commit is contained in:

Paul Hauner

2020-08-11 05:16:30 +00:00

parent b83fcd5e5c

commit b063df5bf9

16 changed files with 93 additions and 12 deletions

									
										beacon_node/eth2_libp2p/Cargo.toml
									
		+1
		-1
	
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				@@ -32,7 +32,7 @@ snap = "1.0.0"

				void = "1.0.2"

				tokio-io-timeout = "0.4.0"

				tokio-util = { version = "0.3.1", features = ["codec", "compat"] }

				discv5 = { version = "0.1.0-alpha.8", features = ["libp2p"] }

				discv5 = { version = "0.1.0-alpha.8", features = ["libp2p", "openssl-vendored"] }

				tiny-keccak = "2.0.2"

				environment = { path = "../../lighthouse/environment" }

				# TODO: Remove rand crate for mainnet