+/* Exim: OS-specific C header file for Darwin (Mac OS X) */
+
+/* #define CRYPT_H */ /* Apparently this isn't needed */
+
+#define HAVE_MMAP
+#define HAVE_SYS_MOUNT_H
+#define PAM_H_IN_PAM
+#define SIOCGIFCONF_GIVES_ADDR
+
+/* OSX 10.2 does not have poll.h, 10.3 does emulate it badly. */
+#define NO_POLL_H
+
+#define F_FREESP O_TRUNC
+typedef struct flock flock_t;
+
+#define BASE_62 36 /* HFS+ aliases lower and upper cases in filenames.
+ Consider reducing MAX_LOCALHOST_NUMBER */
+
+#ifndef _BSD_SOCKLEN_T_
+#define _BSD_SOCKLEN_T_ int32_t /* socklen_t (duh) */
+#endif
+
+/* Settings for handling IP options. There's no netinet/ip_var.h. The IP
+option handling is in the style of the later GLIBCs but the GLIBC macros
+aren't set, so we invent a new one. */
+
+#define NO_IP_VAR_H
+#define DARWIN_IP_OPTIONS
+
+/* Need this for the DNS lookup code. Remember to remove if we get round to
+updating Exim to use the newer interface. */
+
+#define BIND_8_COMPAT
+
+/* It's not .so for dynamic libraries on Darwin. */
+#define DYNLIB_FN_EXT "dylib"
+
+/* We currently need some assistance getting OFF_T_FMT correct on MacOS */
+#ifdef OFF_T_FMT
+# undef OFF_T_FMT
+#endif
+#define OFF_T_FMT "%lld"
+#define LONGLONG_T long int
+
+/* default is non-const */
+#define ICONV_ARG2_TYPE const char **
+
+/* End */