Exposes C-ABI bindings for drift program.
Goals:
- Enable building SDKs that reuse program logic.
- Separate rust SDK from program/solana runtime dependencies. Allows rust SDK to freely update to latest solana-* crates with bug fixes, improvements, etc.
-
this crate must be built with rust <= 1.76.0 to provide compatibility with onchain data layouts (later rust versions have breaking changes 128-bit integer C-abi compatibility)
-
for rust users this crate is intended to be linked via compiler flags (not Cargo dependency) as it compiles to a (platform dependent) dynamic lib (
.so/.dylib/.dll) -
can ignore most of the warnings for FFI safety. The main issue are types containing
u128/i128s which are handled by a customcompat::u128/i128type that forces correct alignment where required.