https://github.com/hasse69/rar2fs/pull/51

From e8c477f726eb7bfd65ef33e2b080063e6f8013c0 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Tue, 21 Jun 2016 14:54:06 -0400
Subject: [PATCH] include sys/sysmacros.h for major/minor/makedev

These funcs are defined in sys/sysmacros.h, so include the header to
fix building with C libs that don't implicitly include via sys/types.h.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 configure.ac | 2 +-
 rar2fs.c     | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

--- a/rar2fs.c
+++ b/rar2fs.c
@@ -56,6 +56,9 @@
 #ifdef HAVE_SYS_XATTR_H
 # include <sys/xattr.h>
 #endif
+#ifdef __linux__
+# include <sys/sysmacros.h>
+#endif
 #ifdef HAVE_ICONV
 #include <iconv.h>
 #endif
-- 
2.8.2