From 69e27f1d9d475a94e61fa54af40ac7be06d872ca Mon Sep 17 00:00:00 2001
From: panne <unknown>
Date: Wed, 17 Dec 2003 08:38:14 +0000
Subject: [PATCH] [project @ 2003-12-17 08:38:14 by panne] To get
 wglGetProcAddress on Windows, we have to link with
 opengl32.dll, too, even when we are using Cygwin with X11.

---
 aclocal.m4 |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/aclocal.m4 b/aclocal.m4
index ea3c4b2..5e5d4c9 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -997,7 +997,18 @@ else
       test -n "$x_libraries" && GL_LIBS="-L$x_libraries -lX11 $GL_LIBS"
     fi
 
-    FP_CHECK_GL_HELPER([GL], [-lopengl32 -lGL], [@%:@include <GL/gl.h>], [glEnd()])
+    FP_CHECK_GL_HELPER([GL], [-lGL -lopengl32], [@%:@include <GL/gl.h>], [glEnd()])
+
+    # Ugly: To get wglGetProcAddress on Windows, we have to link with
+    # opengl32.dll, too, even when we are using Cygwin with X11.
+    case "$GL_LIBS" in
+      *-lopengl32*|*opengl32.lib*) ;;
+      *) fp_save_LIBS="$LIBS"
+         LIBS="$LIBS -lopengl32"
+         AC_TRY_LINK([@%:@include <GL/gl.h>], [glEnd()], [GL_LIBS="$GL_LIBS -lopengl32"])
+         LIBS="$fp_save_LIBS"
+         ;;
+    esac
   fi
 fi
 
-- 
1.7.10.4