Merge pull request #5184 from wasmerio/fix-wamr-ios-build

fix(api/wamr): Build `wamr` on `iOS`

lib/api/build.rs

@@ -85,14 +85,35 @@ fn main() {
             .define("WAMR_DISABLE_HW_BOUND_CHECK", "1")
             .define("WAMR_BUILD_TARGET", target_arch);
 
-        if cfg!(target_os = "windows") {
+        if target_os == "windows" {
             dst.define("CMAKE_CXX_COMPILER", "cl.exe");
             dst.define("CMAKE_C_COMPILER", "cl.exe");
             dst.define("CMAKE_LINKER_TYPE", "MSVC");
             dst.define("WAMR_BUILD_PLATFORM", "windows");
             dst.define("WAMR_BUILD_LIBC_UVWASI", "0");
         }
 
+        if target_os == "ios" {
+            // XXX: Hacky
+            //
+            // Compiling wamr targeting `aarch64-apple-ios` results in
+            //
+            // ```
+            //  clang: error: unsupported option '-mfloat-abi=' for target 'aarch64-apple-ios'
+            // ```
+            // So, here, we simply remove that setting.
+            //
+            // See: https://github.com/bytecodealliance/wasm-micro-runtime/pull/3889
+            let mut lines = vec![];
+            let cmake_file_path = wamr_platform_dir.join("CMakeLists.txt");
+            for line in std::fs::read_to_string(&cmake_file_path).unwrap().lines() {
+                if !line.contains("-mfloat-abi=hard") {
+                    lines.push(line.to_string())
+                }
+            }
+            std::fs::write(cmake_file_path, lines.join("\n")).unwrap();
+        }
+
         let dst = dst.build();
 
         // Check output of `cargo build --verbose`, should see something like: