Cross compiling from macOS for a pi zero w

[jedahan]

I need to manage node versions > 0.10.0 on a pi zero w, and people pointed me towards this project.

Unfortunately, building it on the pi crashes during the linker step (likely OOM).

So I decided to try and cross compile. Here are barebones info for others who might want to do the same, and maybe is enough info for rtx project to provide armv6l binaries.

environment

m1 macbook pro

▲ uname -v
Darwin Kernel Version 22.6.0: Wed Jul  5 22:22:05 PDT 2023; root:xnu-8796.141.3~6/RELEASE_ARM64_T6000

compiling

Install dependencies - we compile for musl target instead of gnu because openssl cross compilation is full of pain.

rustup target add arm-unknown-linux-musleabihf
brew install arm-unknown-linux-musleabihf

then build!

cargo build --release --no-default-features --features rustls \
  --target arm-unknown-linux-musleabihf \
  --config target.arm-unknown-linux-musleabihf.linker=\"arm-linux-musleabihf-ld\"

heres the file info

▲ file target/arm-unknown-linux-musleabihf/release/rtx
target/arm-unknown-linux-musleabihf/release/rtx: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, with debug_info, not stripped

[jedahan]

Tested! Seems to be working fine...