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

[ghost]

Hello,

I have recently tried to incorporate this crate into my project and get the following error when building:

error: failed to run custom build command for `libffi-sys v1.1.0`

Caused by:
  process didn't exit successfully: `/Users/john/Documents/picoscope/target/debug/build/libffi-sys-553610b39d60f72f/build-script-build` (exit code: 101)
  --- stderr
  autogen.sh: line 2: exec: autoreconf: not found
  thread 'main' panicked at 'Generating configure', /Users/john/.cargo/registry/src/github.heygears.com-1ecc6299db9ec823/libffi-sys-1.1.0/build/common.rs:8:5
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: build failed

I have also tried to add libffi = "1.0.0" and libffi-sys = "1.1.0" to my dependencies list with no luck.

For reference, I am building on macOS with the latest pico-sdk package downloaded from picotech.

Do you have any tips to get this to work? Thank you!

[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!

[ghost]

Yep that fixed it. Thank you!

[timfish]

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