diff -urNd ParaView-v5.5.0/VTK/ThirdParty/eigen/vtkeigen/CMakeLists.txt ParaView-v5.5.0-fix/VTK/ThirdParty/eigen/vtkeigen/CMakeLists.txt
--- ParaView-v5.5.0/VTK/ThirdParty/eigen/vtkeigen/CMakeLists.txt	2018-04-07 06:03:33.000000000 +1000
+++ ParaView-v5.5.0-fix/VTK/ThirdParty/eigen/vtkeigen/CMakeLists.txt	2018-04-10 16:19:08.841144557 +1000
@@ -21,14 +21,6 @@
   set(CMAKE_BUILD_TYPE "Release")
 endif()
 
-string(TOLOWER "${CMAKE_BUILD_TYPE}" cmake_build_type_tolower)
-if(    NOT cmake_build_type_tolower STREQUAL "debug"
-   AND NOT cmake_build_type_tolower STREQUAL "release"
-   AND NOT cmake_build_type_tolower STREQUAL "relwithdebinfo")
-  message(FATAL_ERROR "Unknown build type \"${CMAKE_BUILD_TYPE}\". Allowed values are Debug, Release, RelWithDebInfo (case-insensitive).")
-endif()
-
-
 #############################################################################
 # retrieve version infomation                                               #
 #############################################################################