- Fix legit threading issue which shows itself on clang / macos mostly

- Fix all warnings that I can / ignore those caused by boost

src/test_module.cpp

@@ -49,6 +49,10 @@ int *get_new_int()
 #pragma warning(disable : 4190)
 #endif
 
+#ifdef __llvm__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wreturn-type-c-linkage"
+#endif
 
 CHAISCRIPT_MODULE_EXPORT  chaiscript::ModulePtr create_chaiscript_module_test_module()
 {
@@ -86,6 +90,10 @@ CHAISCRIPT_MODULE_EXPORT  chaiscript::ModulePtr create_chaiscript_module_test_mo
 }
 
 
+#ifdef __llvm__
+#pragma clang diagnostic pop
+#endif
+
 #ifdef BOOST_MSVC
 #pragma warning(pop)
 #endif