+#if !defined (PLATFORM_WIN32)
+
+/*
+ * Solaris doesn't define these BSD values, and if they're not present then
+ * map.c:Mono_Posix_FromSeekFlags() breaks badly; see:
+ * http://bugzilla.gnome.org/show_bug.cgi?id=370081
+ */
+
+#ifndef L_SET
+#define L_SET SEEK_SET
+#endif /* ndef L_SET */
+
+#ifndef L_INCR
+#define L_INCR SEEK_CUR
+#endif /* ndef L_INCR */
+
+#ifndef L_XTND
+#define L_XTND SEEK_END
+#endif /* ndef L_XTND */
+
+#endif /* ndef PLATFORM_WIN32 */
+