Threading abstraction layer added
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index dda7ff1..bc22f26 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -52,6 +52,7 @@
      ssl_cli.c
      ssl_srv.c
      ssl_tls.c
+     threading.c
      timing.c
      version.c
      x509.c