$OpenBSD$

Like Mac OS X, we also don't have this header.

Index: xpcom/io/nsLocalFileUnix.cpp
--- xpcom/io/nsLocalFileUnix.cpp.orig
+++ xpcom/io/nsLocalFileUnix.cpp
@@ -13,7 +13,7 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
-#if !defined(XP_MACOSX)
+#if 0
 #include <sys/sysmacros.h> // No longer implicitly included in later glibc
 #endif
 #include <unistd.h>