diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -291,6 +291,40 @@
 	endif()
 endif()
 
+check_cxx_source_compiles("
+    #include <filesystem>
+    namespace fs = std::filesystem;
+    int main() {
+        (void)fs::current_path().root_name();
+        return 0;
+    }
+" HAVE_STD_FILESYSTEM)
+
+if(!HAVE_STD_FILESYSTEM)
+    link_libraries(stdc++fs)
+    check_cxx_source_compiles("
+        #include <filesystem>
+        namespace fs = std::filesystem;
+        int main() {
+            (void)fs::current_path().root_name();
+            return 0;
+        }
+    " REQUIRES_STDCXXFS)
+    if(!REQUIRES_STDCXXFS)
+        link_libraries(c++fs)
+        check_cxx_source_compiles("
+            #include <filesystem>
+            namespace fs = std::filesystem;
+            int main() {
+                (void)fs::current_path().root_name();
+                return 0;
+            }
+        " REQUIRES_CXXFS)
+        if(!REQUIRES_CXXFS)
+            message(FATAL_ERROR "cannot figure out how to use std::filesystem" )
+        endif()
+    endif()
+endif()
 
 # Make sure that all the global compiler and linker flags are set BEFORE
 # including the libraries so they apply as needed.