From 10f4257c3b87a73a45d55cc5cca94406b2d77804 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Sat, 28 Jun 2014 12:10:31 -0700
Subject: [PATCH] configure: support WIC + OpenGL under mingw64

fixes issue #211

original patch by grizzly dot nyo at gmail

Change-Id: Ie7bf63d24c112e7e351979da4bebcb690a831c5d
---
 configure.ac | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 665647d4..972d188a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -190,7 +190,7 @@ AS_IF([test "x$enable_gl" != "xno"], [
 
       # find libGL
       GL_SAVED_LIBS="$LIBS"
-      AC_SEARCH_LIBS([glBegin], [GL OpenGL])
+      AC_SEARCH_LIBS([glBegin], [GL OpenGL opengl32])
       LIBS="$GL_SAVED_LIBS"
 
       # A direct link to libGL may not be necessary on e.g., linux.
@@ -369,7 +369,8 @@ AC_ARG_ENABLE([wic],
                               @<:@default=auto@:>@]),,
               [enable_wic=yes])
 
-if test "$target_os" = "mingw32" -a "$enable_wic" = "yes"; then
+if test \( "$target_os" = "mingw32" -o "$target_os" = "mingw64" \) \
+        -a "$enable_wic" = "yes"; then
   AC_CHECK_HEADERS([wincodec.h shlwapi.h windows.h])
   if test "$ac_cv_header_wincodec_h" = "yes"; then
     AC_MSG_CHECKING(for Windows Imaging Component support)