Fixing warnings generated by clang 8.0 on Windows

* Deprecation removals previously specific to MSVC/Intel now also used
  by clang
* String literals were assigned to non const pointers. These are stored
  in mutable arrays now
* An implicit function pointer to pointer conversion is a Microsoft
  extension warning is suppressed by an explicit reinterpret_cast
* The MSVC specific deprecation macro for jsoncpp was moved after the
  clang macro to avoid redefinition warnings. This is consistent with
  how jsoncpp fixed the issue in 36d8cfd7

CompileFlags.cmake

@@ -8,11 +8,16 @@ if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Intel")
   set(_INTEL_WINDOWS 1)
 endif()
 
+if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Clang"
+   AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
+  set(_CLANG_MSVC_WINDOWS 1)
+endif()
+
 # Disable deprecation warnings for standard C functions.
 # really only needed for newer versions of VS, but should
 # not hurt other versions, and this will work into the
 # future
-if(MSVC OR _INTEL_WINDOWS)
+if(MSVC OR _INTEL_WINDOWS OR _CLANG_MSVC_WINDOWS)
   add_definitions(-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE)
 else()
 endif()
@@ -21,9 +26,7 @@ if(MSVC)
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stack:10000000")
 endif()
 
-if(CMAKE_CXX_COMPILER_ID STREQUAL Clang
+if(_CLANG_MSVC_WINDOWS AND "x${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
-   AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC"
-   AND "x${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Xlinker -stack:20000000")
 endif()
 

Source/cmCallVisualStudioMacro.cxx

@@ -61,7 +61,8 @@ HRESULT InstanceCallMacro(IDispatch* vsIDE, const std::string& macro,
 
   if (0 != vsIDE) {
     DISPID dispid = (DISPID)-1;
-    OLECHAR* name = L"ExecuteCommand";
+    wchar_t execute_command[] = L"ExecuteCommand";
+    OLECHAR* name = execute_command;
 
     hr =
       vsIDE->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &dispid);
@@ -119,7 +120,8 @@ HRESULT InstanceCallMacro(IDispatch* vsIDE, const std::string& macro,
         }
         oss << "  dwHelpContext: " << excep.dwHelpContext << std::endl;
         oss << "  pvReserved: " << excep.pvReserved << std::endl;
-        oss << "  pfnDeferredFillIn: " << excep.pfnDeferredFillIn << std::endl;
+        oss << "  pfnDeferredFillIn: "
+            << reinterpret_cast<void*>(excep.pfnDeferredFillIn) << std::endl;
         oss << "  scode: " << excep.scode << std::endl;
       }
 
@@ -140,7 +142,8 @@ HRESULT GetSolutionObject(IDispatch* vsIDE, IDispatchPtr& vsSolution)
 
   if (0 != vsIDE) {
     DISPID dispid = (DISPID)-1;
-    OLECHAR* name = L"Solution";
+    wchar_t solution[] = L"Solution";
+    OLECHAR* name = solution;
 
     hr =
       vsIDE->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &dispid);
@@ -183,7 +186,8 @@ HRESULT GetSolutionFullName(IDispatch* vsSolution, std::string& fullName)
 
   if (0 != vsSolution) {
     DISPID dispid = (DISPID)-1;
-    OLECHAR* name = L"FullName";
+    wchar_t full_name[] = L"FullName";
+    OLECHAR* name = full_name;
 
     hr = vsSolution->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
                                    &dispid);

Source/cmGlobalGenerator.cxx

@@ -535,11 +535,22 @@ void cmGlobalGenerator::EnableLanguage(
 
 #  ifdef KWSYS_WINDOWS_DEPRECATED_GetVersionEx
 #    pragma warning(push)
-#    pragma warning(disable : 4996)
+#    ifdef __INTEL_COMPILER
+#      pragma warning(disable : 1478)
+#    elif defined __clang__
+#      pragma clang diagnostic push
+#      pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#    else
+#      pragma warning(disable : 4996)
+#    endif
 #  endif
     GetVersionExW((OSVERSIONINFOW*)&osviex);
 #  ifdef KWSYS_WINDOWS_DEPRECATED_GetVersionEx
-#    pragma warning(pop)
+#    ifdef __clang__
+#      pragma clang diagnostic pop
+#    else
+#      pragma warning(pop)
+#    endif
 #  endif
     std::ostringstream windowsVersionString;
     windowsVersionString << osviex.dwMajorVersion << "."

Utilities/cmjsoncpp/include/json/config.h

@@ -79,11 +79,6 @@
 #    pragma warning(disable : 4786)
 #  endif // MSVC 6
 
-#  if _MSC_VER >= 1500 // MSVC 2008
-    /// Indicates that the following function is deprecated.
-#    define JSONCPP_DEPRECATED(message) __declspec(deprecated(message))
-#  endif
-
 #endif // defined(_MSC_VER)
 
 // In c++11 the override keyword allows you to explicity define that a function
@@ -137,7 +132,10 @@
 #  elif (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
 #    define JSONCPP_DEPRECATED(message)  __attribute__((__deprecated__))
 #  endif  // GNUC version
-#endif // __clang__ || __GNUC__
+#elif defined(_MSC_VER) && _MSC_VER >= 1500 // MSVC 2008
+    /// Indicates that the following function is deprecated.
+#    define JSONCPP_DEPRECATED(message) __declspec(deprecated(message))
+#endif // __clang__ || __GNUC__ || _MSC_VER
 
 #undef JSONCPP_DEPRECATED // no deprecations in CMake copy
 #if !defined(JSONCPP_DEPRECATED)