Rust/unit-wasm-sys: Don't require the wasi-sysroot

When I added the luw_http_hdr_get_value() function I needed to include
strings.h, unfortunately I added it to unit-wasm.h instead of
libunit-wasm.c

This then meant that we needed to point bindgen/clang, for generating
the bindings, to the wasi-sysroot for the strings.h file. I guess this
is a system dependant include or something and when we use the
wasm32-wasi target in clang it uses a paired down include search path
list, none of which have strings.h

This then had the knock on effect of requiring to inform cargo build of
the wasi-sysroot path.

Now that we put strings.h in the right place, we don't need the
wasi-sysroot when building the rust stuff.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/src/rust/unit-wasm-sys/build.rs b/src/rust/unit-wasm-sys/build.rs
index bd8d3a5..3d3ff0e 100644
--- a/src/rust/unit-wasm-sys/build.rs
+++ b/src/rust/unit-wasm-sys/build.rs
@@ -30,15 +30,12 @@ fn main() {
 }
 
 fn generate_bindings() {
-    let wasi_sysroot =
-        "--sysroot=".to_owned() + &env::var("WASI_SYSROOT").unwrap();
     let bindings = bindgen::Builder::default()
         // The input header file.
         .header("libunit-wasm/include/unit/unit-wasm.h")
         .allowlist_function("^luw_.*")
         .allowlist_var("^luw_.*")
         .allowlist_type("^luw_.*")
-        .clang_args(vec![wasi_sysroot]) // Needed for strings.h
         .generate()
         .expect("Unable to generate bindings");