Explicitly state ABI on exports

Not releated to the edition bump but I've been getting warnings about these for a while (maybe rustc update) - using the default=C has been deprecated

Author: AndrewSisley

tests/modules/rust_wasm32_counter/src/lib.rs

@@ -21,12 +21,12 @@ pub struct Value {
 static COUNTER: Lazy<RelaxedCounter> = Lazy::new(|| RelaxedCounter::new(0));
 
 #[unsafe(no_mangle)]
-pub extern fn alloc(size: usize) -> *mut u8 {
+pub extern "C" fn alloc(size: usize) -> *mut u8 {
     lens_sdk::alloc(size)
 }
 
 #[unsafe(no_mangle)]
-pub extern fn transform() -> *mut u8 {
+pub extern "C" fn transform() -> *mut u8 {
     match try_transform() {
         Ok(o) => match o {
             Some(result_json) => lens_sdk::to_mem(lens_sdk::JSON_TYPE_ID, &result_json),

tests/modules/rust_wasm32_filter/src/lib.rs

@@ -17,12 +17,12 @@ pub struct Value {
 }
 
 #[unsafe(no_mangle)]
-pub extern fn alloc(size: usize) -> *mut u8 {
+pub extern "C" fn alloc(size: usize) -> *mut u8 {
     lens_sdk::alloc(size)
 }
 
 #[unsafe(no_mangle)]
-pub extern fn transform() -> *mut u8 {
+pub extern "C" fn transform() -> *mut u8 {
     match try_transform() {
         Ok(o) => match o {
             Some(result_json) => lens_sdk::to_mem(lens_sdk::JSON_TYPE_ID, &result_json),

tests/modules/rust_wasm32_normalize/src/lib.rs

@@ -30,12 +30,12 @@ pub struct Page {
 static PENDING_PAGES: RwLock<Lazy<VecDeque<Page>>> = RwLock::new(Lazy::new(|| VecDeque::new()));
 
 #[unsafe(no_mangle)]
-pub extern fn alloc(size: usize) -> *mut u8 {
+pub extern "C" fn alloc(size: usize) -> *mut u8 {
     lens_sdk::alloc(size)
 }
 
 #[unsafe(no_mangle)]
-pub extern fn transform() -> *mut u8 {
+pub extern "C" fn transform() -> *mut u8 {
     match try_transform() {
         Ok(o) => match o {
             Some(result_json) => lens_sdk::to_mem(lens_sdk::JSON_TYPE_ID, &result_json.clone()),

tests/modules/rust_wasm32_rename/src/lib.rs

@@ -42,12 +42,12 @@ pub struct Parameters {
 static PARAMETERS: RwLock<StreamOption<Parameters>> = RwLock::new(None);
 
 #[unsafe(no_mangle)]
-pub extern fn alloc(size: usize) -> *mut u8 {
+pub extern "C" fn alloc(size: usize) -> *mut u8 {
     lens_sdk::alloc(size)
 }
 
 #[unsafe(no_mangle)]
-pub extern fn set_param(ptr: *mut u8) -> *mut u8 {
+pub extern "C" fn set_param(ptr: *mut u8) -> *mut u8 {
     match try_set_param(ptr) {
         Ok(_) => lens_sdk::nil_ptr(),
         Err(e) => lens_sdk::to_mem(lens_sdk::ERROR_TYPE_ID, &e.to_string().as_bytes())
@@ -64,7 +64,7 @@ fn try_set_param(ptr: *mut u8) -> Result<(), Box<dyn Error>> {
 }
 
 #[unsafe(no_mangle)]
-pub extern fn transform() -> *mut u8 {
+pub extern "C" fn transform() -> *mut u8 {
     match try_transform() {
         Ok(o) => match o {
             Some(result_json) => lens_sdk::to_mem(lens_sdk::JSON_TYPE_ID, &result_json),

tests/modules/rust_wasm32_simple/src/lib.rs

@@ -29,12 +29,12 @@ pub struct Output {
 }
 
 #[unsafe(no_mangle)]
-pub extern fn alloc(size: usize) -> *mut u8 {
+pub extern "C" fn alloc(size: usize) -> *mut u8 {
     lens_sdk::alloc(size)
 }
 
 #[unsafe(no_mangle)]
-pub extern fn transform() -> *mut u8 {
+pub extern "C" fn transform() -> *mut u8 {
     match try_transform() {
         Ok(o) => match o {
             Some(result_json) => lens_sdk::to_mem(lens_sdk::JSON_TYPE_ID, &result_json),

tests/modules/rust_wasm32_simple2/src/lib.rs

@@ -21,12 +21,12 @@ pub struct Value {
 }
 
 #[unsafe(no_mangle)]
-pub extern fn alloc(size: usize) -> *mut u8 {
+pub extern "C" fn alloc(size: usize) -> *mut u8 {
     lens_sdk::alloc(size)
 }
 
 #[unsafe(no_mangle)]
-pub extern fn transform() -> *mut u8 {
+pub extern "C" fn transform() -> *mut u8 {
     match try_transform() {
         Ok(o) => match o {
             Some(result_json) => lens_sdk::to_mem(lens_sdk::JSON_TYPE_ID, &result_json),
@@ -57,7 +57,7 @@ fn try_transform() -> Result<StreamOption<Vec<u8>>, Box<dyn Error>> {
 }
 
 #[unsafe(no_mangle)]
-pub extern fn inverse() -> *mut u8 {
+pub extern "C" fn inverse() -> *mut u8 {
     match try_inverse() {
         Ok(o) => match o {
             Some(result_json) => lens_sdk::to_mem(lens_sdk::JSON_TYPE_ID, &result_json),