From b2e10d1d1befbab9be2cbe6ecce5b077f7c85560 Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Mon, 9 Jun 2025 10:05:05 +0100
Subject: [PATCH] MinGW: Fix latest MinGW support build

---
 src/coap_io.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/coap_io.c b/src/coap_io.c
index 9f5d261c..daff14e9 100644
--- a/src/coap_io.c
+++ b/src/coap_io.c
@@ -92,7 +92,9 @@ coap_mfree_endpoint(coap_endpoint_t *ep) {
 #define CMSG_NXTHDR WSA_CMSG_NXTHDR
 #define CMSG_LEN WSA_CMSG_LEN
 #define CMSG_SPACE WSA_CMSG_SPACE
+#if(_WIN32_WINNT < 0x0603)
 #define cmsghdr _WSACMSGHDR
+#endif /* (_WIN32_WINNT<0x0603) */
 #endif /* (_WIN32_WINNT>=0x0600) */
 #endif /* defined(__MINGW32__) */