Tests failing with the stable-x86_64-pc-windows-gnu toolchain.

[plusvic]

The tests fail with the stable-x86_64-pc-windows-gnu toolchain, apparently because of some issue with the linkme crate. It works with stable-x86_64-pc-windows-msvc, though.

The linkme crate is used for creating the static slice wasm::WASM_EXPORTS , which contains an entry for every function that can be called from WASM. This includes functions decorated with the #[wasm_export] and #[module_export] attributes, which ultimately result in the use of the #[distributed_slice] attribute provided by linkme. Example:

#[distributed_slice(WASM_EXPORTS)]
pub(crate) static export__add: WasmExport = WasmExport {
     name: "add",
     mangled_name: "add@ii@i",
     rust_module_path: "yara_x::modules::my_module",
     func: &WasmExportedFn2 { target_fn: &add },
     public: true,
};

For some reason, when using the stable-x86_64-pc-windows-gnu toolchain, not all functions are added to the wasm::WASM_EXPORTS slice, only the ones declared in the yara-x/src/wasm/mod.rs file are added. All other functions, specifically those declared in modules are not added at all. The compilation process works well, but tests fail due to the missing entries in wasm::WASM_EXPORTS.

[plusvic]

Possibly related: dtolnay/linkme#25