diff --git a/Source/ThirdParty/Assimp/contrib/zlib/gzguts.h b/Source/ThirdParty/Assimp/contrib/zlib/gzguts.h
index 6378d46..c8563db 100644
--- a/Source/ThirdParty/Assimp/contrib/zlib/gzguts.h
+++ b/Source/ThirdParty/Assimp/contrib/zlib/gzguts.h
@@ -38,6 +38,9 @@
 #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32)
 #  include <io.h>
 #endif
+#ifdef __APPLE__
+#  include <unistd.h>
+#endif
 
 #if defined(_WIN32)
 #  define WIDECHAR
diff --git a/Source/ThirdParty/Civetweb/src/civetweb.c b/Source/ThirdParty/Civetweb/src/civetweb.c
index 4d26e0a..2bd577e 100644
--- a/Source/ThirdParty/Civetweb/src/civetweb.c
+++ b/Source/ThirdParty/Civetweb/src/civetweb.c
@@ -167,6 +167,8 @@ mg_static_assert(sizeof(void *) >= sizeof(int), "data type size check");
 
 #endif
 
+#include <stdlib.h>
+
 #if !defined(DEBUG_TRACE)
 #if defined(DEBUG)
 
diff --git a/Source/ThirdParty/SDL/CMakeLists.txt b/Source/ThirdParty/SDL/CMakeLists.txt
index 5c4ef27..fd4c4dd 100644
--- a/Source/ThirdParty/SDL/CMakeLists.txt
+++ b/Source/ThirdParty/SDL/CMakeLists.txt
@@ -428,15 +428,6 @@ if(USE_GCC OR USE_CLANG)
     list(APPEND EXTRA_CFLAGS "-fno-strict-aliasing")
   endif()
 
-  check_c_compiler_flag(-Wdeclaration-after-statement HAVE_GCC_WDECLARATION_AFTER_STATEMENT)
-  if(HAVE_GCC_WDECLARATION_AFTER_STATEMENT)
-    check_c_compiler_flag(-Werror=declaration-after-statement HAVE_GCC_WERROR_DECLARATION_AFTER_STATEMENT)
-    # Urho3D - bug fix - SDL does not build cleanly for Android platform with this flag on, make a tweak here rather than changing on their code
-    if(HAVE_GCC_WERROR_DECLARATION_AFTER_STATEMENT AND NOT ANDROID)
-      list(APPEND EXTRA_CFLAGS "-Werror=declaration-after-statement")
-    endif()
-    list(APPEND EXTRA_CFLAGS "-Wdeclaration-after-statement")
-  endif()
 
   if(DEPENDENCY_TRACKING)
     check_c_source_compiles("