Index: libcfa/src/concurrency/kernel/cluster.cfa
===================================================================
--- libcfa/src/concurrency/kernel/cluster.cfa	(revision dd46fd32b4edcf85ecf2f4f00b042e3a3852db2e)
+++ libcfa/src/concurrency/kernel/cluster.cfa	(revision fbdfcd83585b2a3ef34770330c0628c3911372df)
@@ -15,5 +15,4 @@
 
 #define __cforall_thread__
-#define _GNU_SOURCE
 
 #include "bits/defs.hfa"
Index: libcfa/src/concurrency/kernel/startup.cfa
===================================================================
--- libcfa/src/concurrency/kernel/startup.cfa	(revision dd46fd32b4edcf85ecf2f4f00b042e3a3852db2e)
+++ libcfa/src/concurrency/kernel/startup.cfa	(revision fbdfcd83585b2a3ef34770330c0628c3911372df)
@@ -15,5 +15,4 @@
 
 #define __cforall_thread__
-#define _GNU_SOURCE
 
 // #define __CFA_DEBUG_PRINT_RUNTIME_CORE__