Index: src/objfw-defs.h.in
==================================================================
--- src/objfw-defs.h.in
+++ src/objfw-defs.h.in
@@ -1,10 +1,9 @@
 #undef OF_APPLE_RUNTIME
 #undef OF_ATOMIC_OPS
 #undef OF_BIG_ENDIAN
 #undef OF_FLOAT_BIG_ENDIAN
-#undef OF_GNU_RUNTIME
 #undef OF_HAVE_ASPRINTF
 #undef OF_HAVE_BLOCKS
 #undef OF_HAVE_FAST_ENUMERATION
 #undef OF_HAVE_GCC_ATOMIC_OPS
 #undef OF_HAVE_OPTIONAL_PROTOCOLS
@@ -14,9 +13,8 @@
 #undef OF_HAVE_PTHREADS
 #undef OF_HAVE_PTHREAD_SPINLOCKS
 #undef OF_HAVE_SCHED_YIELD
 #undef OF_HAVE_SYS_SELECT_H
 #undef OF_OBJFW_RUNTIME
-#undef OF_OLD_GNU_RUNTIME
 #undef OF_PLUGINS
 #undef OF_THREADS
 #undef SIZE_MAX