ENH: Added check of the unallowed characters in the repo path.

CMakeLists.txt

@@ -61,6 +61,14 @@ if(CMAKE_BUILD_TYPE MATCHES DEBUG)
   set(CMAKE_VERBOSE_MAKEFILE ON)
 endif()
 
+#------------------------------------------------------------------------------------#
+# Check, if the path to the current directory does contain some unallowed characters #
+#------------------------------------------------------------------------------------#
+string(REGEX MATCH "[A-Za-z0-9 \\\\/:_-]*" MATCH ${CMAKE_CURRENT_LIST_DIR})
+if (NOT ${MATCH} STREQUAL ${CMAKE_CURRENT_LIST_DIR})
+    message(FATAL_ERROR "Illegal character(s) found in the path to the current directory!")
+endif()
+
 #-------------------------#
 # Find external libraries #
 #-------------------------#