clippy: fix no_mangle and export_name usage (#1337)

clippy: fix no_mangle and export_name usage

The no_mangle and export_name attributes cannot be used at the same time.
(Link: rust-lang/rust#47446)
Since Clippy now warns about this we were notified about our misuse and this PR fixes it.

crates/c_api/macro/lib.rs

@@ -26,7 +26,7 @@ pub fn declare_own(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
 
     (quote! {
         #[doc = #docs]
-        #[no_mangle]
+        #[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
         #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
         pub extern "C" fn #delete(_: ::alloc::boxed::Box<#ty>) {}
     })
@@ -49,7 +49,7 @@ pub fn declare_ty(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
         ::wasmi_c_api_macros::declare_own!(#ty);
 
         #[doc = #docs]
-        #[no_mangle]
+        #[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
         #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
         pub extern "C" fn #copy(src: &#ty) -> ::alloc::boxed::Box<#ty> {
             ::alloc::boxed::Box::new(src.clone())
@@ -98,7 +98,7 @@ pub fn declare_ref(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
         ::wasmi_c_api_macros::declare_ty!(#ty);
 
         #[doc = #same_docs]
-        #[no_mangle]
+        #[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
         #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
         pub extern "C" fn #same(_a: &#ty, _b: &#ty) -> ::core::primitive::bool {
             #[cfg(feature = "std")]
@@ -107,14 +107,14 @@ pub fn declare_ref(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
         }
 
         #[doc = #get_host_info_docs]
-        #[no_mangle]
+        #[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
         #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
         pub extern "C" fn #get_host_info(a: &#ty) -> *mut ::core::ffi::c_void {
             ::core::ptr::null_mut()
         }
 
         #[doc = #set_host_info_docs]
-        #[no_mangle]
+        #[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
         #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
         pub extern "C" fn #set_host_info(a: &#ty, info: *mut ::core::ffi::c_void) {
             #[cfg(feature = "std")]
@@ -123,7 +123,7 @@ pub fn declare_ref(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
         }
 
         #[doc = #set_host_info_final_docs]
-        #[no_mangle]
+        #[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
         #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
         pub extern "C" fn #set_host_info_final(
             a: &#ty,
@@ -136,7 +136,7 @@ pub fn declare_ref(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
         }
 
         #[doc = #as_ref_docs]
-        #[no_mangle]
+        #[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
         #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
         pub extern "C" fn #as_ref(a: &#ty) -> ::alloc::boxed::Box<crate::wasm_ref_t> {
             #[cfg(feature = "std")]
@@ -145,7 +145,7 @@ pub fn declare_ref(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
         }
 
         #[doc = #as_ref_const_docs]
-        #[no_mangle]
+        #[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
         #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
         pub extern "C" fn #as_ref_const(a: &#ty) -> ::alloc::boxed::Box<crate::wasm_ref_t> {
             #[cfg(feature = "std")]

crates/c_api/src/config.rs

@@ -20,7 +20,7 @@ wasmi_c_api_macros::declare_own!(wasm_config_t);
 /// Wraps [`wasmi::Config::default`].
 ///
 /// [`wasm_engine_new_with_config`]: crate::wasm_engine_new_with_config
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_config_new() -> Box<wasm_config_t> {
     Box::new(wasm_config_t {

crates/c_api/src/engine.rs

@@ -18,7 +18,7 @@ wasmi_c_api_macros::declare_own!(wasm_engine_t);
 /// The returned [`wasm_engine_t`] must be freed using [`wasm_engine_delete`].
 ///
 /// Wraps [`wasmi::Engine::default`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_engine_new() -> Box<wasm_engine_t> {
     Box::new(wasm_engine_t {
@@ -31,7 +31,7 @@ pub extern "C" fn wasm_engine_new() -> Box<wasm_engine_t> {
 /// The returned [`wasm_engine_t`] must be freed using [`wasm_engine_delete`].
 ///
 /// Wraps [`wasmi::Engine::new`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_engine_new_with_config(config: Box<wasm_config_t>) -> Box<wasm_engine_t> {
     Box::new(wasm_engine_t {

crates/c_api/src/error.rs

@@ -29,7 +29,7 @@ impl From<wasmi_error_t> for Error {
 /// Creates a new [`wasmi_error_t`] with the given error message.
 ///
 /// Wraps [`wasmi::Error::new`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[allow(clippy::not_unsafe_ptr_arg_deref)] // clippy 0.1.79 (129f3b99 2024-06-10): incorrectly reports a bug here
 pub extern "C" fn wasmi_error_new(msg: *const ffi::c_char) -> Option<Box<wasmi_error_t>> {
     let msg_bytes = unsafe { ffi::CStr::from_ptr(msg) };

crates/c_api/src/extern.rs

@@ -22,7 +22,7 @@ pub struct wasm_extern_t {
 wasmi_c_api_macros::declare_ref!(wasm_extern_t);
 
 /// Returns the [`wasm_extern_kind`] of the [`wasm_extern_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_kind(e: &wasm_extern_t) -> wasm_externkind_t {
     match e.which {
@@ -39,7 +39,7 @@ pub extern "C" fn wasm_extern_kind(e: &wasm_extern_t) -> wasm_externkind_t {
 ///
 /// It is the caller's responsibility not to alias the [`wasm_extern_t`]
 /// with its underlying, internal [`WasmStoreRef`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_extern_type(e: &wasm_extern_t) -> Box<wasm_externtype_t> {
     Box::new(wasm_externtype_t::from_extern_type(
@@ -50,7 +50,7 @@ pub unsafe extern "C" fn wasm_extern_type(e: &wasm_extern_t) -> Box<wasm_externt
 /// Returns the [`wasm_extern_t`] as reference to mutable [`wasm_func_t`] if possible.
 ///
 /// Returns `None` if `e` is not a [`wasm_func_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_as_func(e: &mut wasm_extern_t) -> Option<&mut wasm_func_t> {
     wasm_func_t::try_from_mut(e)
@@ -59,7 +59,7 @@ pub extern "C" fn wasm_extern_as_func(e: &mut wasm_extern_t) -> Option<&mut wasm
 /// Returns the [`wasm_extern_t`] as reference to shared [`wasm_func_t`] if possible.
 ///
 /// Returns `None` if `e` is not a [`wasm_func_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_as_func_const(e: &wasm_extern_t) -> Option<&wasm_func_t> {
     wasm_func_t::try_from(e)
@@ -68,7 +68,7 @@ pub extern "C" fn wasm_extern_as_func_const(e: &wasm_extern_t) -> Option<&wasm_f
 /// Returns the [`wasm_extern_t`] as reference to mutable [`wasm_global_t`] if possible.
 ///
 /// Returns `None` if `e` is not a [`wasm_global_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_as_global(e: &mut wasm_extern_t) -> Option<&mut wasm_global_t> {
     wasm_global_t::try_from_mut(e)
@@ -77,7 +77,7 @@ pub extern "C" fn wasm_extern_as_global(e: &mut wasm_extern_t) -> Option<&mut wa
 /// Returns the [`wasm_extern_t`] as reference to shared [`wasm_global_t`] if possible.
 ///
 /// Returns `None` if `e` is not a [`wasm_global_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_as_global_const(e: &wasm_extern_t) -> Option<&wasm_global_t> {
     wasm_global_t::try_from(e)
@@ -86,7 +86,7 @@ pub extern "C" fn wasm_extern_as_global_const(e: &wasm_extern_t) -> Option<&wasm
 /// Returns the [`wasm_extern_t`] as reference to mutable [`wasm_table_t`] if possible.
 ///
 /// Returns `None` if `e` is not a [`wasm_table_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_as_table(e: &mut wasm_extern_t) -> Option<&mut wasm_table_t> {
     wasm_table_t::try_from_mut(e)
@@ -95,7 +95,7 @@ pub extern "C" fn wasm_extern_as_table(e: &mut wasm_extern_t) -> Option<&mut was
 /// Returns the [`wasm_extern_t`] as reference to shared [`wasm_table_t`] if possible.
 ///
 /// Returns `None` if `e` is not a [`wasm_table_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_as_table_const(e: &wasm_extern_t) -> Option<&wasm_table_t> {
     wasm_table_t::try_from(e)
@@ -104,7 +104,7 @@ pub extern "C" fn wasm_extern_as_table_const(e: &wasm_extern_t) -> Option<&wasm_
 /// Returns the [`wasm_extern_t`] as reference to mutable [`wasm_memory_t`] if possible.
 ///
 /// Returns `None` if `e` is not a [`wasm_memory_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_as_memory(e: &mut wasm_extern_t) -> Option<&mut wasm_memory_t> {
     wasm_memory_t::try_from_mut(e)
@@ -113,7 +113,7 @@ pub extern "C" fn wasm_extern_as_memory(e: &mut wasm_extern_t) -> Option<&mut wa
 /// Returns the [`wasm_extern_t`] as reference to shared [`wasm_memory_t`] if possible.
 ///
 /// Returns `None` if `e` is not a [`wasm_memory_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_extern_as_memory_const(e: &wasm_extern_t) -> Option<&wasm_memory_t> {
     wasm_memory_t::try_from(e)

crates/c_api/src/foreign.rs

@@ -12,7 +12,7 @@ wasmi_c_api_macros::declare_ref!(wasm_foreign_t);
 /// # Note
 ///
 /// This API is unsupported and will panic upon use.
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_foreign_new(_store: &crate::wasm_store_t) -> Box<wasm_foreign_t> {
     unimplemented!("wasm_foreign_new")

crates/c_api/src/frame.rs

@@ -16,7 +16,7 @@ wasmi_c_api_macros::declare_own!(wasm_frame_t);
 /// # Note
 ///
 /// This API is unsupported and will panic upon use.
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_frame_func_index(_frame: &wasm_frame_t<'_>) -> u32 {
     unimplemented!("wasm_frame_func_index")
@@ -27,7 +27,7 @@ pub extern "C" fn wasm_frame_func_index(_frame: &wasm_frame_t<'_>) -> u32 {
 /// # Note
 ///
 /// This API is unsupported and will panic upon use.
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_frame_func_offset(_frame: &wasm_frame_t<'_>) -> usize {
     unimplemented!("wasm_frame_func_offset")
@@ -38,7 +38,7 @@ pub extern "C" fn wasm_frame_func_offset(_frame: &wasm_frame_t<'_>) -> usize {
 /// # Note
 ///
 /// This API is unsupported and will panic upon use.
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_frame_instance(_arg1: *const wasm_frame_t<'_>) -> *mut wasm_instance_t {
     unimplemented!("wasm_frame_instance")
@@ -49,7 +49,7 @@ pub extern "C" fn wasm_frame_instance(_arg1: *const wasm_frame_t<'_>) -> *mut wa
 /// # Note
 ///
 /// This API is unsupported and will panic upon use.
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_frame_module_offset(_frame: &wasm_frame_t<'_>) -> usize {
     unimplemented!("wasm_frame_module_offset")
@@ -60,7 +60,7 @@ pub extern "C" fn wasm_frame_module_offset(_frame: &wasm_frame_t<'_>) -> usize {
 /// # Note
 ///
 /// This API is unsupported and will panic upon use.
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_frame_copy<'a>(_frame: &wasm_frame_t<'a>) -> Box<wasm_frame_t<'a>> {
     unimplemented!("wasm_frame_copy")

crates/c_api/src/func.rs

@@ -119,7 +119,7 @@ unsafe fn create_function(
 ///
 /// It is the caller's responsibility not to alias the [`wasm_functype_t`]
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_func_new(
     store: &mut wasm_store_t,
@@ -141,7 +141,7 @@ pub unsafe extern "C" fn wasm_func_new(
 ///
 /// It is the caller's responsibility not to alias the [`wasm_functype_t`]
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_func_new_with_env(
     store: &mut wasm_store_t,
@@ -185,7 +185,7 @@ fn prepare_params_and_results(
 ///
 /// It is the caller's responsibility not to alias the [`wasm_func_t`]
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_func_call(
     func: &mut wasm_func_t,
@@ -250,7 +250,7 @@ fn error_from_panic(panic: Box<dyn Any + Send>) -> Error {
 ///
 /// It is the caller's responsibility not to alias the [`wasm_func_t`]
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_func_type(f: &wasm_func_t) -> Box<wasm_functype_t> {
     Box::new(wasm_functype_t::new(f.func().ty(f.inner.store.context())))
@@ -266,7 +266,7 @@ pub unsafe extern "C" fn wasm_func_type(f: &wasm_func_t) -> Box<wasm_functype_t>
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
 ///
 /// [`FuncType::params`]: wasmi::FuncType::params
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_func_param_arity(f: &wasm_func_t) -> usize {
     f.func().ty(f.inner.store.context()).params().len()
@@ -282,21 +282,21 @@ pub unsafe extern "C" fn wasm_func_param_arity(f: &wasm_func_t) -> usize {
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
 ///
 /// [`FuncType::results`]: wasmi::FuncType::results
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_func_result_arity(f: &wasm_func_t) -> usize {
     f.func().ty(f.inner.store.context()).results().len()
 }
 
 /// Returns the [`wasm_func_t`] as mutable reference to [`wasm_extern_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_func_as_extern(f: &mut wasm_func_t) -> &mut wasm_extern_t {
     &mut f.inner
 }
 
 /// Returns the [`wasm_func_t`] as shared reference to [`wasm_extern_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_func_as_extern_const(f: &wasm_func_t) -> &wasm_extern_t {
     &f.inner

crates/c_api/src/global.rs

@@ -48,7 +48,7 @@ impl wasm_global_t {
 ///
 /// It is the caller's responsibility not to alias the [`wasm_global_t`]
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_global_new(
     store: &mut wasm_store_t,
@@ -70,14 +70,14 @@ pub unsafe extern "C" fn wasm_global_new(
 }
 
 /// Returns the [`wasm_global_t`] as mutable reference to [`wasm_extern_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_global_as_extern(g: &mut wasm_global_t) -> &mut wasm_extern_t {
     &mut g.inner
 }
 
 /// Returns the [`wasm_global_t`] as shared reference to [`wasm_extern_t`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub extern "C" fn wasm_global_as_extern_const(g: &wasm_global_t) -> &wasm_extern_t {
     &g.inner
@@ -91,7 +91,7 @@ pub extern "C" fn wasm_global_as_extern_const(g: &wasm_global_t) -> &wasm_extern
 ///
 /// It is the caller's responsibility not to alias the [`wasm_global_t`]
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_global_type(g: &wasm_global_t) -> Box<wasm_globaltype_t> {
     let globaltype = g.global().ty(g.inner.store.context());
@@ -106,7 +106,7 @@ pub unsafe extern "C" fn wasm_global_type(g: &wasm_global_t) -> Box<wasm_globalt
 ///
 /// It is the caller's responsibility not to alias the [`wasm_global_t`]
 /// with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_global_get(g: &mut wasm_global_t, out: &mut MaybeUninit<wasm_val_t>) {
     let global = g.global();
@@ -125,7 +125,7 @@ pub unsafe extern "C" fn wasm_global_get(g: &mut wasm_global_t, out: &mut MaybeU
 /// - It is the caller's responsibility that `val` matches the type of `g`.
 /// - It is the caller's responsibility not to alias the [`wasm_global_t`]
 ///   with its underlying, internal [`WasmStoreRef`](crate::WasmStoreRef).
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_global_set(g: &mut wasm_global_t, val: &wasm_val_t) {
     let global = g.global();

crates/c_api/src/instance.rs

@@ -43,7 +43,7 @@ impl wasm_instance_t {
 /// with its underlying, internal [`WasmStoreRef`].
 ///
 /// [Wasm core specification]: https://webassembly.github.io/spec/core/exec/modules.html#exec-instantiation
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_instance_new(
     store: &mut wasm_store_t,
@@ -80,7 +80,7 @@ pub unsafe extern "C" fn wasm_instance_new(
 ///
 /// It is the caller's responsibility not to alias the [`wasm_instance_t`]
 /// with its underlying, internal [`WasmStoreRef`].
-#[no_mangle]
+#[cfg_attr(not(feature = "prefix-symbols"), no_mangle)]
 #[cfg_attr(feature = "prefix-symbols", wasmi_c_api_macros::prefix_symbol)]
 pub unsafe extern "C" fn wasm_instance_exports(
     instance: &mut wasm_instance_t,