+/* 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 **
+