#[cfg(feature = "generate-c-api-headers")] extern crate cbindgen; use std::env; static CAPI_ENV_VAR: &str = "WASM_EMSCRIPTEN_GENERATE_C_API_HEADERS"; fn main() { if env::var(CAPI_ENV_VAR).unwrap_or("0".to_string()) == "1" { build(); } } #[cfg(feature = "generate-c-api-headers")] fn build() { let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap(); cbindgen::Builder::new() .with_crate(crate_dir) .generate() .expect("Unable to generate bindings") .write_to_file("wasmer.h"); } #[cfg(not(feature = "generate-c-api-headers"))] fn build() { panic!("environment var set to generate wasmer c API headers but generate-c-api-headers feature not enabled") }