From 705a2b9bc8c74924129773f0de89f6f3d5a175b0 Mon Sep 17 00:00:00 2001
From: Tristan Colgate-McFarlane <tcolgate@gmail.com>
Date: Wed, 20 Oct 2010 09:28:30 +0100
Subject: [PATCH] Fix detection of struct ip_mreq

* configura.ac: netinet/in.h is required to complete definition of
  struct ip_mreq.
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 34ec60356..faf31f3a3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -673,7 +673,8 @@ AC_CHECK_TYPE(socklen_t, ,
 #endif
 #include <sys/socket.h>
 ])
-AC_CHECK_TYPE(struct ip_mreq)
+
+AC_CHECK_TYPES([struct ip_mreq], , , [#include <netinet/in.h>])
 
 GUILE_HEADER_LIBC_WITH_UNISTD
 
-- 
2.20.1