Error: failed to run custom build command for 'libffi-sys v1.1.0' about pico-sdk

[timfish]

The key bit from your error message is:

autoreconf: not found

Currently this Rust SDK uses libffi to work around the fact that some older Pico driver methods do not allow us to pass context with callbacks. libffi-sys links to the libffi C library and requires that you have native C build tools installed as well as automake, autoconf, etc.

To ensure you have C build tools installed, run this in the terminal and follow any prompts:

xcode-select --install

The easiest way to get the other tools installed on macOS is to install Homebrew and then run:

brew install autoconf automake libtool

I will add these instructions to the docs/readme!

Yep that fixed it. Thank you!

[timfish]

I'm going to leave this open to remind me to update the docs!