From 3f97a5c5298c2439262383cb91fa7caab5a393f7 Mon Sep 17 00:00:00 2001
From: William Pitcock <nenolod@dereferenced.org>
Date: Sun, 20 Mar 2016 02:07:06 -0500
Subject: [PATCH] configure: check for MINGW

---
 configure.ac | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/configure.ac b/configure.ac
index 408c0868..2c3b0363 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,6 +19,25 @@ fi
 AC_PREFIX_DEFAULT($HOME/ircd)
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_HEADER(include/setup.h)
+
+case "$host_os" in
+*cygwin*)
+     AC_DEFINE_UNQUOTED(CYGWIN,1,[This is a Cygwin system])
+     AC_DEFINE_UNQUOTED(WINDOWS,1,[This is a Windows system])
+     ;;
+*mingw*)
+     AC_DEFINE_UNQUOTED(MINGW,1,[This is a MinGW system])
+     AC_DEFINE_UNQUOTED(WINDOWS,1,[This is a Windows system])
+     AC_CHECK_HEADER(winsock2.h, , [AC_MSG_ERROR([** MinGW and no winsock2.h.  I give up.])])
+     LIBS="$LIBS -lws2_32 -liphlpapi"
+     is_mingw="yes"
+     ;;
+*)
+     ;;
+esac
+
+AM_CONDITIONAL([MINGW], [test "$is_mingw" = "yes"])
+
 AC_CONFIG_SUBDIRS([librb])
 AC_CONFIG_AUX_DIR([libltdl/config])