Gate AbstractType derive macro behind a derive feature-flag

rust/Cargo.toml

@@ -6,15 +6,17 @@ edition = "2021"
 
 [features]
 noexports = []
+derive = ["binaryninja-derive", "elain"]
 
 [dependencies]
 lazy_static = "1.4.0"
 log = "0.4"
 libc = "0.2"
 rayon = { version = "1.8", optional = true }
 binaryninjacore-sys = { path = "binaryninjacore-sys" }
-binaryninja-derive = { path = "binaryninja-derive" }
-elain = "0.3.0"
+binaryninja-derive = { path = "binaryninja-derive", optional = true }
+# Const-generic alignment gadgetry used by the `AbstractType` derive macro
+elain = { version = "0.3.0", optional = true }
 
 [patch.crates-io]
 # Patched pdb crate to implement some extra structures

rust/src/lib.rs

@@ -169,6 +169,7 @@ use std::path::PathBuf;
 pub use binaryninjacore_sys::BNBranchType as BranchType;
 pub use binaryninjacore_sys::BNEndianness as Endianness;
 use binaryview::BinaryView;
+#[cfg(feature = "derive")]
 pub use elain;
 use metadata::Metadata;
 use metadata::MetadataType;

rust/src/types.rs

@@ -691,6 +691,7 @@ impl Drop for TypeBuilder {
 //////////
 // Type
 
+#[cfg(feature = "derive")]
 pub use binaryninja_derive::*;
 pub trait AbstractType: Sized {
     const SIZE: usize = std::mem::size_of::<Self>();