xcode fix prototype warnings (#158)

* fix void parm functions

* add prototypes

* add no-strict-prototypes

* cutil update

* no-strict-prototypes

* update MACOSX

* update cutil

CMakeLists.txt

@@ -41,7 +41,15 @@ set(run_e2e_tests OFF)
 set(run_unittests OFF)
 set(skip_samples ON)
 
+if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+    set(MACOSX TRUE)
+endif()
+
 if(NOT ${use_installed_dependencies})
+    if(MACOSX)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-strict-prototypes")
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-strict-prototypes")
+    endif()
     if ((NOT TARGET azure_macro_utils_c) AND (EXISTS ${CMAKE_CURRENT_LIST_DIR}/deps/azure-macro-utils-c/CMakeLists.txt))
         add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/deps/azure-macro-utils-c)
     endif()

deps/c-utility

@@ -1 +1 @@
-Subproject commit 0e120535898c4b00bb2ec6f3c4c7f59ee5e8ead8
+Subproject commit 55bb392cd220e6b369336a7bd42e2a2a47507b2b