From 2cfb92f5c6bc64998e9a830b931252c1ba500b49 Mon Sep 17 00:00:00 2001
From: Sjoerd van der Berg <harekiet@users.sourceforge.net>
Date: Wed, 28 Jan 2004 14:23:55 +0000
Subject: [PATCH] Check for opengl support

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1610
---
 configure.in | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/configure.in b/configure.in
index 12a1512d..ad483f7b 100644
--- a/configure.in
+++ b/configure.in
@@ -132,7 +132,6 @@ else
   AC_MSG_RESULT(no)
 fi 
 
-
 AH_TEMPLATE(C_SSHOT,[Define to 1 to enable screenshots, requires libpng])
 AC_CHECK_HEADER(png.h,have_png_h=yes,)
 AC_CHECK_LIB(png, png_check_sig, have_png_lib=yes, ,-lz)
@@ -153,6 +152,24 @@ else
    AC_MSG_WARN([Can't find SDL_net, internal modem disabled])
 fi
 
+AH_TEMPLATE(C_OPENGL,[Define to 1 to use opengl display output support])
+AC_ARG_ENABLE(opengl,AC_HELP_STRING([--disable-opengl],[Disable opengl support]),,enable_opengl=yes)
+AC_CHECK_LIB(GL, main, have_gl_lib=yes, have_gl_lib=no , )
+AC_CHECK_LIB(opengl32, main, have_opengl32_lib=yes,have_opengl32_lib=no , )
+AC_CHECK_HEADER(GL/gl.h, have_gl_h=yes , have_gl_h=no , )
+AC_MSG_CHECKING(whether opengl display output will be enabled) 
+if test x$enable_opengl = xyes -a x$have_gl_h = xyes -a x$have_gl_lib = xyes ; then 
+  AC_MSG_RESULT(yes)
+  LIBS="$LIBS -lGL"
+  AC_DEFINE(C_OPENGL,1)
+elif test x$enable_opengl = xyes -a x$have_gl_h = xyes -a x$have_opengl32_lib = xyes ; then 
+  AC_MSG_RESULT(yes)
+  LIBS="$LIBS -lopengl32"
+  AC_DEFINE(C_OPENGL,1)
+else
+  AC_MSG_RESULT(no)
+fi
+
 dnl Some host detection and actions for them
 case "$target" in
     *-*-cygwin* | *-*-mingw32*)
@@ -171,6 +188,7 @@ case "$target" in
        ;;
 esac
 
+
 AC_OUTPUT([ 
 Makefile
 src/Makefile