fix: call unload_process_handler only if supported by the platform.

Author: plusvic

lib/src/wasm/mod.rs

@@ -798,7 +798,15 @@ pub(crate) fn get_engine<'a>() -> &'a Engine {
 ///   to undefined behavior.
 pub(crate) unsafe fn free_engine() {
     #[allow(static_mut_refs)]
-    ENGINE.take().unwrap().unload_process_handlers()
+    #[cfg(any(
+        target_arch = "x86_64",
+        target_arch = "aarch64",
+        target_arch = "riscv64",
+        target_arch = "s390x",
+    ))]
+    {
+        ENGINE.take().unwrap().unload_process_handlers()
+    }
 }
 
 pub(crate) fn new_linker() -> Linker<ScanContext<'static, 'static>> {