--- /dev/null
+/* s/ file for Darwin/MacOS X systems */
+
+#define SYSTEM_TYPE "darwin"
+
+/* Defines this as a BSD system, used in fakemail, for example */
+#ifndef NOT_C_CODE
+#include <sys/param.h>
+#endif
+
+/* The builtin malloc is broken in the sense that replacing it
+ with a user implementation is impossible. */
+#define SYSTEM_MALLOC
+
+#define HAVE_PTYS
+
+/* TAB3 is defined in Unix98, but darwin doesn't have it.
+ OXTABS is the traditional BSD equivalent. */
+#define TAB3 OXTABS