Index: src/libcfa/startup.c
===================================================================
--- src/libcfa/startup.c	(revision c2ea058a7f13c18e575da0f9a16803ad11219008)
+++ src/libcfa/startup.c	(revision 36463e21f08098ed15fc49c4083fb7ca58daf44a)
@@ -39,4 +39,5 @@
 } // extern "C"
 
+struct __spinlock_t;
 void __cfaabi_dbg_record(struct __spinlock_t & this, const char * prev_name) __attribute__(( weak )) {}