COMP: long paths are not yet supported by all the tools in the build …

…chain

As of January 2018, MSBuild and Visual Studio do not yet support long paths.

Change-Id: I1f77bb231b3d6e548a2ce39c63360c4cbe01a114

CMakeLists.txt

@@ -40,7 +40,9 @@ if( CMAKE_HOST_WIN32 )
       set(_LongPathKey LongPathsEnabled)
       execute_process(COMMAND reg query HKLM\\SYSTEM\\CurrentControlSet\\Control\\FileSystem /v ${_LongPathKey} OUTPUT_VARIABLE _output)
       string(REGEX MATCH "${_LongPathKey}.*REG_DWORD.*[0-9]x([0-9])" _regex ${_output})
-      set(ITK_SKIP_PATH_LENGTH_CHECKS ${CMAKE_MATCH_1} CACHE BOOL "Skips max path length checks. These checks can be disabled for Windows version 10.0.14393 and later if registry key HKLM\\SYSTEM\\CurrentControlSet\\Control\\FileSystem\\LongPathsEnabled is set to 1")
+      if (${CMAKE_MATCH_1})
+        set(ITK_SKIP_PATH_LENGTH_CHECKS 0 CACHE BOOL "Skips max path length checks. These checks can be disabled for Windows version 10.0.14393 and later if registry key HKLM\\SYSTEM\\CurrentControlSet\\Control\\FileSystem\\LongPathsEnabled is set to 1 and all tools support long paths. As of January 2018, MSBuild and Visual Studio do not support it yet.")
+      endif()
     endif()
   endif()
 endif()