Port WASI host types

build.rs

@@ -1,96 +0,0 @@
-use std::env;
-use std::fs::File;
-use std::path::{Path, PathBuf};
-use std::process::{Command, Stdio};
-
-fn wasi_sdk() -> PathBuf {
-    Path::new(&env::var("WASI_SDK").unwrap_or("/opt/wasi-sdk".to_owned())).to_path_buf()
-}
-
-fn wasi_sysroot() -> PathBuf {
-    match env::var("WASI_SYSROOT") {
-        Ok(wasi_sysroot) => Path::new(&wasi_sysroot).to_path_buf(),
-        Err(_) => {
-            let mut path = wasi_sdk();
-            path.push("share");
-            path.push("sysroot");
-            path
-        }
-    }
-}
-
-fn wasm_clang_root() -> PathBuf {
-    match env::var("CLANG_ROOT") {
-        Ok(clang) => Path::new(&clang).to_path_buf(),
-        Err(_) => {
-            let mut path = wasi_sdk();
-            path.push("lib");
-            path.push("clang");
-            path.push("8.0.0");
-            path
-        }
-    }
-}
-
-fn main() {
-    let wasi_sysroot = wasi_sysroot();
-    let wasm_clang_root = wasm_clang_root();
-    assert!(
-        wasi_sysroot.exists(),
-        "wasi-sysroot not present at {:?}",
-        wasi_sysroot
-    );
-    assert!(
-        wasm_clang_root.exists(),
-        "clang-root not present at {:?}",
-        wasm_clang_root
-    );
-
-    let wasi_sysroot_core_h = wasi_sysroot.join("include/wasi/core.h");
-
-    assert!(
-        wasi_sysroot_core_h.exists(),
-        "wasi-sysroot core.h not present at {:?}",
-        wasi_sysroot_core_h
-    );
-
-    println!("cargo:rerun-if-changed={}", wasi_sysroot_core_h.display());
-
-    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
-
-    let core_h_path = out_path.join("core.h");
-    let core_h = File::create(&core_h_path).unwrap();
-
-    // `bindgen` doesn't understand typed constant macros like `UINT8_C(123)`, so this fun regex
-    // strips them off to yield a copy of `wasi/core.h` with bare constants.
-    let sed_result = Command::new("sed")
-        .arg("-E")
-        .arg(r#"s/U?INT[0-9]+_C\(((0x)?[0-9]+)\)/\1/g"#)
-        .arg(wasi_sysroot_core_h)
-        .stdout(Stdio::from(core_h))
-        .status()
-        .expect("can execute sed");
-
-    if !sed_result.success() {
-        // something failed, but how?
-        match sed_result.code() {
-            Some(code) => panic!("sed failed with code {}", code),
-            None => panic!("sed exited abnormally"),
-        }
-    }
-
-    let host_builder = bindgen::Builder::default()
-        .clang_arg("-nostdinc")
-        .clang_arg("-D__wasi__")
-        .clang_arg(format!("-isystem={}/include/", wasi_sysroot.display()))
-        .clang_arg(format!("-I{}/include/", wasm_clang_root.display()))
-        .header(core_h_path.to_str().unwrap())
-        .whitelist_type("__wasi_.*")
-        .whitelist_var("__WASI_.*");
-
-    host_builder
-        .generate()
-        .expect("can generate host bindings")
-        .write_to_file(out_path.join("wasi_host.rs"))
-        .expect("can write host bindings");
-}