Index: libcfa/src/concurrency/invoke.c
===================================================================
--- libcfa/src/concurrency/invoke.c	(revision 8a5e3579a7e054f14b57f01e1fed825bdf30a2bf)
+++ libcfa/src/concurrency/invoke.c	(revision cce46486af6b1ec94d321bec0f28a927d57903cd)
@@ -36,5 +36,5 @@
 extern void enable_interrupts( _Bool poll );
 
-void __cfactx_invoke_coroutine(
+libcfa_public void __cfactx_invoke_coroutine(
 	void (*main)(void *),
 	void *this
@@ -70,5 +70,5 @@
 }
 
-void __cfactx_coroutine_unwind(struct _Unwind_Exception * storage, struct coroutine$ * cor) __attribute__ ((__noreturn__));
+libcfa_public void __cfactx_coroutine_unwind(struct _Unwind_Exception * storage, struct coroutine$ * cor) __attribute__ ((__noreturn__));
 void __cfactx_coroutine_unwind(struct _Unwind_Exception * storage, struct coroutine$ * cor) {
 	_Unwind_Reason_Code ret = _Unwind_ForcedUnwind( storage, __cfactx_coroutine_unwindstop, cor );
@@ -77,5 +77,5 @@
 }
 
-void __cfactx_invoke_thread(
+libcfa_public void __cfactx_invoke_thread(
 	void (*main)(void *),
 	void *this
@@ -98,5 +98,5 @@
 }
 
-void __cfactx_start(
+libcfa_public void __cfactx_start(
 	void (*main)(void *),
 	struct coroutine$ * cor,