From eda099889438813bcddac3718a231ee86bbbb028 Mon Sep 17 00:00:00 2001
From: Gisle Vanem <gisle.vanem@gmail.com>
Date: Tue, 23 Oct 2018 12:55:07 +0200
Subject: [PATCH] Fix for compiling with lwIP (3)

lwIP on Windows does not have a WSAIoctl() function.
But it do have a SO_SNDBUF option to lwip_setsockopt(). But it currently does nothing.
---
 lib/transfer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/transfer.c b/lib/transfer.c
index c7f4ef9f3..b73f94d9e 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -879,7 +879,7 @@ static CURLcode done_sending(struct connectdata *conn,
   return CURLE_OK;
 }
 
-#ifdef WIN32
+#if defined(WIN32) && !defined(USE_LWIPSOCK)
 #ifndef SIO_IDEAL_SEND_BACKLOG_QUERY
 #define SIO_IDEAL_SEND_BACKLOG_QUERY 0x4004747B
 #endif