From: Matt Corallo <git@bluematt.me>
Date: Fri, 19 Feb 2021 22:56:15 +0000 (-0500)
Subject: Add simple README about our C bindings generation stuff
X-Git-Tag: v0.0.13~17^2
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=refs%2Fheads%2F2021-02-bindings-rust-bump;p=rust-lightning

Add simple README about our C bindings generation stuff
---

diff --git a/c-bindings-gen/README.md b/c-bindings-gen/README.md
new file mode 100644
index 000000000..8377adc4b
--- /dev/null
+++ b/c-bindings-gen/README.md
@@ -0,0 +1,14 @@
+LDK C Bindings Generator
+========================
+
+This program parses a Rust crate's AST from a single lib.rs passed in on stdin and generates a
+second crate which is C-callable (and carries appropriate annotations for cbindgen). It is usually
+invoked via the `genbindings.sh` script in the top-level directory, which converts the lightning
+crate into a single file with a call to
+`RUSTC_BOOTSTRAP=1 cargo rustc --profile=check -- -Zunstable-options --pretty=expanded`.
+
+`genbindings.sh` requires that you have a rustc installed with the `wasm32-wasi` target available
+(eg via the `libstd-rust-dev-wasm32` package on Debian or `rustup target add wasm32-wasi` for those
+using rustup), cbindgen installed via `cargo install cbindgen` and in your `PATH`, and `clang`,
+`clang++`, `gcc`, and `g++` available in your `PATH`. It uses `valgrind` if it is available to test
+the generated bindings thoroughly for memory management issues.