iOS build fixes

project/include/hl.h

@@ -233,8 +233,10 @@ typedef uint16_t uchar;
 #if defined(HL_IOS) || defined(HL_TVOS) || defined(HL_MAC)
 #include <stddef.h>
 #include <stdint.h>
+#ifdef HL_MAC
 typedef uint16_t char16_t;
 typedef uint32_t char32_t;
+#endif
 #elif defined(HL_NATIVE_UCHAR_FUN)
 #	include <uchar.h>
 #elif __cplusplus <= 199711L

project/src/system/System.mm

@@ -9,6 +9,28 @@
 namespace lime {
 
 
+	void System::GCEnterBlocking () {
+
+		// if (!_isHL) {
+
+			gc_enter_blocking ();
+
+		// }
+
+	}
+
+
+	void System::GCExitBlocking () {
+
+		// if (!_isHL) {
+
+			gc_exit_blocking ();
+
+		// }
+
+	}
+
+
 	std::wstring* System::GetIOSDirectory (SystemDirectory type) {
 
 		#ifndef OBJC_ARC