Check for wrong header file inclusions, add CBM510 stuff

[cc65] / include / geos.h

diff --git a/include/geos.h b/include/geos.h
index 671a4aeb11555dbad17750d58342d24901df3af0..f70a88b6edce004b7261846157ec961587c0357a 100644 (file)
--- a/include/geos.h
+++ b/include/geos.h
@@ -12,6 +12,13 @@
 
 
 
+/* Check for errors */
+#if !defined(__GEOS__)
+#  error This module may only be used when compiling for GEOS!
+#endif
+
+
+
 #ifndef _GCONST_H
 #include <geos/gconst.h>
 #endif