Index: src/libcfa/startup.c
===================================================================
--- src/libcfa/startup.c	(revision c2ea058a7f13c18e575da0f9a16803ad11219008)
+++ src/libcfa/startup.c	(revision 0759ba0c5a04ecfe0dafe558076327ff4fa5d97d)
@@ -39,4 +39,5 @@
 } // extern "C"
 
+struct __spinlock_t;
 void __cfaabi_dbg_record(struct __spinlock_t & this, const char * prev_name) __attribute__(( weak )) {}