Update 06-Considering_Portability.md

Author: lefticus

06-Considering_Portability.md

@@ -6,6 +6,16 @@ Most portability issues that generate warnings are because we are not careful ab
 
 http://www.viva64.com/en/a/0010/
 
+## Use The Standard Library
+
+### `std::filesystem`
+
+C++17 added a new `filesystem` library which provides portable filesystem access across all supporting compilers
+
+### `std::thread`
+
+C++11's threading capabilities should be utilized over `pthread` or `WinThreads`.
+
 ## Other Concerns
 
 Most of the other concerns in this document ultimately come back to portability issues. [Avoid statics](07-Considering_Threadability.md#statics) is particularly of note.