Include std++fs library for clang 10 or older

Author: gknowles

CMakeLists.txt

@@ -524,7 +524,7 @@ function(add_exec_project tgt srcdir)
         # Required for #include <experimental/filesystem>.
         target_link_libraries(${tgt} "stdc++fs")
     elseif(CMAKE_CXX_COMPILER_ID STREQUAL Clang
-            AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "9")
+            AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "11")
         target_link_libraries(${tgt} "stdc++fs")
     endif()
     write_user_file(${tgt} "debug;props;ifNotExists")

tests/perf/pch.h

@@ -3,7 +3,6 @@
 //
 // pch.h - dimcli test perf
 
-#define DIMCLI_LIB_NO_FILESYSTEM
 #include "dimcli/cli.h"
 
 #pragma warning(disable : \