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Learn Rust

One of my goals for the new year is to learn rust. This is a place for me to experiment with that.

Cross Compile for Raspberry Pi 4

First need to add an Arm rust target that works on the Rapsberry Pi

rustup target add armv7-unknown-linux-musleabihf

Then we need to add the arm linker to the local .cargo/config.toml file

[target.armv7-unknown-linux-musleabihf]
linker = "arm-linux-gnueabihf-ld"

NOTE I have tried to get the gnueabihf rust target working, but so far no luck

What is MUSL

musl is an implementation of the C standard library built on top of the Linux system call API, including interfaces defined in the base language standard, POSIX, and widely agreed-upon extensions.

It is nice because you can statically link it into your rust program.

Get Arm cross compiler tools

brew install arm-linux-gnueabihf-binutils

which gives us

> which arm-linux-gnueabihf-ld
/usr/local/bin/arm-linux-gnueabihf-ld

Building GCC from Source doesn't work yet

get gcc source

git clone git://gcc.gnu.org/git/gcc.git

Generate configure for gcc

cd gcc
autoreconf --verbose

NOTE I had to use brew install automake to get aclocal

Move to a build directory and run