$ diff -u FindSWIG.cmake~ FindSWIG.cmake
--- FindSWIG.cmake~     2017-08-10 06:36:32.000000000 -0700
+++ FindSWIG.cmake      2017-08-27 11:40:41.354209400 -0700
@@ -40,7 +40,9 @@
       message(STATUS "Command \"${SWIG_EXECUTABLE} -swiglib\" failed with output:\n${SWIG_swiglib_error}")
     endif()
   else()
-    string(REGEX REPLACE "[\n\r]+" ";" SWIG_swiglib_output ${SWIG_swiglib_output})
+    string(REGEX REPLACE "[\n\r]+" "" SWIG_swiglib_output ${SWIG_swiglib_output})
+    SET(SWIG_swiglib_output "c:/gcdev64/msys2${SWIG_swiglib_output}")
+    MESSAGE(STATUS "Checking Swig Directory ${SWIG_swiglib_output}'")
     find_path(SWIG_DIR swig.swg PATHS ${SWIG_swiglib_output} NO_CMAKE_FIND_ROOT_PATH)
     if(SWIG_DIR)
       set(SWIG_USE_FILE ${CMAKE_CURRENT_LIST_DIR}/UseSWIG.cmake)
@@ -55,8 +57,12 @@
           SWIG_version_output "${SWIG_version_output}")
         set(SWIG_VERSION ${SWIG_version_output} CACHE STRING "Swig version" FORCE)
       endif()
+    else()
+      MESSAGE(SEND_ERROR "Failed to find swig.swg in ${SWIG_swiglib_output}.")
     endif()
   endif()
+  else()
+    MESSAGE(SEND_ERROR "No Swig Executable")
 endif()

 include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)