Update check

CMakeLists.txt

@@ -343,15 +343,16 @@ if( VIAME_ENABLE_VIAME_PLUGINS AND NOT VIAME_ENABLE_KWIVER )
   message( FATAL_ERROR "Building core VIAME plugins require KWIVER" )
 endif()
 
-if( WIN32 AND VIAME_BUILD_DEPENDENCIES AND VIAME_ENABLE_KWIVER )
+if( WIN32 AND VIAME_BUILD_DEPENDENCIES AND VIAME_ENABLE_KWIVER AND VIAME_BUILD_CHECKS )
   string( LENGTH "${VIAME_BUILD_KWIVER_DIR}" KWIVER_BUILD_DIR_LENGTH )
   string( LENGTH "${VIAME_BUILD_PLUGINS_DIR}" PLUGINS_BUILD_DIR_LENGTH )
 
   if( KWIVER_BUILD_DIR_LENGTH GREATER 12 OR PLUGINS_BUILD_DIR_LENGTH GREATER 12 )
     message( FATAL_ERROR "VIAME_BUILD_KWIVER_DIR and VIAME_BUILD_PLUGINS_DIR \
       must be set to a short path (e.g. C:\\tmp\\kv1 and C:\\tmp\\vm1) on \
       Windows due to a current issue with nesting KWIVER exceeding the 260 \
-      character default filepath size." )
+      character default filepath size. Alternatively disable VIAME_BUILD_CHECKS \
+      to ignore this message." )
   endif()
 endif()