Bindgen support

.github/workflows/CI.yml

@@ -59,6 +59,11 @@ jobs:
           zig-version: ${{ matrix.zig }}
       - run: zig version
       - run: cargo build
+      - name: Bindgen
+        run: |
+          git clone --recurse-submodules https://github.com/gyscos/zstd-rs.git tests/zstd-rs
+          rustup target add aarch64-unknown-linux-gnu
+          cargo run zigbuild --manifest-path tests/zstd-rs/Cargo.toml --features bindgen --target aarch64-unknown-linux-gnu
       - name: macOS - Test build
         run: |
           rustup target add x86_64-apple-darwin

src/zig.rs

@@ -417,6 +417,25 @@ impl Zig {
                 cmd.env("CARGO_UNSTABLE_TARGET_APPLIES_TO_HOST", "true");
                 cmd.env("CARGO_TARGET_APPLIES_TO_HOST", "false");
             }
+
+            // bindgen support (Linux only)
+            if let Ok(lib_dir) = Zig::lib_dir() {
+                if raw_target.contains("linux") {
+                    let libc = lib_dir.join("libc");
+                    let bindgen_env = format!("BINDGEN_EXTRA_CLANG_ARGS_{}", env_target);
+                    if raw_target.contains("musl") {
+                        cmd.env(
+                            bindgen_env,
+                            format!("--sysroot={}", libc.join("musl").display()),
+                        );
+                    } else if raw_target.contains("gnu") {
+                        cmd.env(
+                            bindgen_env,
+                            format!("--sysroot={}", libc.join("glibc").display()),
+                        );
+                    }
+                }
+            }
         }
         Ok(())
     }