From d50e0094bf21bf908100d04730677b968bd8b59d Mon Sep 17 00:00:00 2001
From: Lars Erik Wik <lars.erik.wik@northern.tech>
Date: Thu, 5 Mar 2026 16:18:20 +0100
Subject: [PATCH] Fix inet_ntop/inet_pton declaration check for MinGW
 cross-compilation

The AC_CHECK_DECLS for inet_ntop and inet_pton only checked
<arpa/inet.h>, which does not exist on MinGW. On MinGW, these
functions are declared in <ws2tcpip.h>. This caused the check to
fail, leaving HAVE_DECL_INET_NTOP=0, which made platform.h
re-declare inet_ntop with socklen_t. With mingw-w64 >= v11 (Ubuntu
24.04), ws2tcpip.h declares inet_ntop with size_t, causing a
conflicting types error.

Include the correct Winsock headers in the check, matching the
pattern already used by the getaddrinfo check above.

Ticket: ENT-13766
Signed-off-by: Lars Erik Wik <lars.erik.wik@northern.tech>
---
 configure.ac | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 6cac4631..329954b9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -807,7 +807,16 @@ AC_CHECK_DECLS(getaddrinfo, [], [AC_LIBOBJ(getaddrinfo)], [[
 #endif
 ]])
 
-AC_CHECK_DECLS([[inet_ntop], [inet_pton]], [], [], [[#include <arpa/inet.h>]])
+AC_CHECK_DECLS([[inet_ntop], [inet_pton]], [], [], [[
+#if HAVE_WINSOCK2_H
+    #include <winsock2.h>
+#endif
+#if HAVE_WS2TCPIP_H
+    #include <ws2tcpip.h>
+#else
+    #include <arpa/inet.h>
+#endif
+]])
 AC_REPLACE_FUNCS(inet_ntop inet_pton)
 
 AC_CHECK_FUNCS(getifaddrs)