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## Issue Addressed Closes #1504 Closes https://github.com/sigp/lighthouse/issues/1505 ## Proposed Changes * Update `blst` to the latest version, which is more portable and includes finer-grained compilation controls (see below). * Detect the case where a binary has been explicitly compiled with ADX support but it's missing at runtime, and report a nicer error than `SIGILL`. ## Known Issues * None. The previous issue with `make build-aarch64` (https://github.com/supranational/blst/issues/27), has been resolved. ## Additional Info I think we should tweak our release process and our Docker builds so that we provide two options: Binaries: * `lighthouse`: compiled with `modern`/`force-adx`, for CPUs 2013 and newer * `lighthouse-portable`: compiled with `portable` for older CPUs Docker images: * `sigp/lighthouse:latest`: multi-arch image with `modern` x86_64 and vanilla aarch64 binary * `sigp/lighthouse:latest-portable`: multi-arch image with `portable` builds for x86_64 and aarch64 And relevant Docker images for the releases (as per https://github.com/sigp/lighthouse/pull/1574#issuecomment-687766141), tagged `v0.x.y` and `v0.x.y-portable`
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Cross-compiling
Lighthouse supports cross-compiling, allowing users to run a binary on one
platform (e.g., aarch64) that was compiled on another platform (e.g.,
x86_64).
Instructions
Cross-compiling requires Docker,
rustembedded/cross and for the
current user to be in the docker group.
The binaries will be created in the target/ directory of the Lighthouse
project.
Targets
The Makefile in the project contains four targets for cross-compiling:
build-x86_64: builds an optimized version for x86_64 processors (suitable for most users). Supports Intel Broadwell (2014) and newer, and AMD Ryzen (2017) and newer.build-x86_64-portable: builds a version for x86_64 processors which avoids using some modern CPU instructions that are incompatible with older CPUs. Suitable for pre-Broadwell/Ryzen CPUs.build-aarch64: builds an optimized version for 64-bit ARM processors (suitable for Raspberry Pi 4).build-aarch64-portable: builds a version for 64-bit ARM processors which avoids using some modern CPU instructions. In practice, very few ARM processors lack the instructions necessary to run the faster non-portable build.
Example
cd lighthouse
make build-aarch64
The lighthouse binary will be compiled inside a Docker container and placed
in lighthouse/target/aarch64-unknown-linux-gnu/release.