From 1b87aff4480414153008b10f84d924442be6f25a Mon Sep 17 00:00:00 2001
From: Tim Angus <tim@ngus.net>
Date: Mon, 4 Aug 2008 11:34:04 +0000
Subject: [PATCH] * Elaborate on the reasons for requiring Windows XP

---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index 336b3e79..9a141a02 100644
--- a/Makefile
+++ b/Makefile
@@ -424,6 +424,12 @@ ifeq ($(PLATFORM),mingw32)
     -DUSE_ICON
 
   # Require Windows XP or later
+  #
+  # IPv6 support requires a header wspiapi.h to work on earlier versions of
+  # windows. There is no MinGW equivalent of this header so we're forced to
+  # require XP. In theory this restriction can be removed if this header is
+  # obtained separately from the platform SDK. The MSVC build does not have
+  # this limitation.
   BASE_CFLAGS += -DWINVER=0x501
 
   ifeq ($(USE_OPENAL),1)