Fix build on CHENEYGC targets.

[sbcl.git] / src / runtime / gencgc-alloc-region.h

diff --git a/src/runtime/gencgc-alloc-region.h b/src/runtime/gencgc-alloc-region.h
index 1ec7ed7..f209205 100644 (file)
--- a/src/runtime/gencgc-alloc-region.h
+++ b/src/runtime/gencgc-alloc-region.h
@@ -3,6 +3,10 @@
 
 #include "gc.h"
 
+#ifndef LISP_FEATURE_GENCGC
+#error "gencgc-alloc-region.h included, but LISP_FEATURE_GENCGC not defined"
+#endif
+
 /* Abstract out the data for an allocation region allowing a single
  * routine to be used for allocation and closing. */
 struct alloc_region {