From 988dbac7ceb93507fe8c490fc934a4dadaefaf12 Mon Sep 17 00:00:00 2001
From: spekulatiusmensch <44848451+spekulatiusmensch@users.noreply.github.com>
Date: Sat, 5 Feb 2022 01:52:35 +0100
Subject: [PATCH] Expand the guide for cross-compilation on Ubuntu/Debian

---
 README.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/README.md b/README.md
index 2a2ab66..8956a57 100644
--- a/README.md
+++ b/README.md
@@ -31,11 +31,25 @@ get too messy either.
 - Install Rust from https://rustup.rs/ 
 - Run `rustup target add arm-unknown-linux-gnueabihf`
 - Install `sudo apt install libclang-dev`
+- Build with `cargo build`
 
 ## Cross-compiling on Ubuntu/Debian
 - Install Rust from https://rustup.rs/ 
 - Run `rustup target add arm-unknown-linux-gnueabihf`
 - Install `sudo apt install libclang-dev gcc-arm-linux-gnueabihf`
+- Create the directory `.cargo` in the root of your Rust project and create a local cargo configuration file `config.toml` in it.
+- Paste the following lines into `config.toml` to always build for the `arm-unknown-linux-gnueabihf` target, to use the GCC linker for this architecture and to set the sysroot so that the linker can find the necessary header files:
+```
+[build]
+target = "arm-unknown-linux-gnueabihf"
+
+[target.arm-unknown-linux-gnueabihf]
+linker = "arm-linux-gnueabihf-gcc"
+
+[env]
+RPI_WS281X_SYSROOT = "/usr/arm-linux-gnueabihf"
+```
+- Build with `cargo build`
 
 ### AArch64 Builds
 - Run `rustup target add aarch64-unknown-linux-gnu`