Add a configure option to disable dga

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
Reviewed-by: Jamey Sharp <jamey@minilop.net>
Signed-off-by: Jamey Sharp <jamey@minilop.net>

configure.ac

@@ -47,6 +47,7 @@ AC_PROG_LIBTOOL
 AH_TOP([#include "xorg-server.h"])
 
 # Define a configure option for an alternate module directory
+AC_ARG_ENABLE(dga,           AS_HELP_STRING([--disable-dga], [Build DGA extension (default: yes)]), [DGA=$enableval], [DGA=yes])
 AC_ARG_WITH(xorg-module-dir, [  --with-xorg-module-dir=DIR ],
                              [ moduledir="$withval" ],
                              [ moduledir="$libdir/xorg/modules" ])
@@ -57,7 +58,13 @@ AC_SUBST(moduledir)
 XORG_DRIVER_CHECK_EXT(RANDR, randrproto)
 XORG_DRIVER_CHECK_EXT(RENDER, renderproto)
 XORG_DRIVER_CHECK_EXT(XV, videoproto)
-XORG_DRIVER_CHECK_EXT(XFreeXDGA, xf86dgaproto)
+
+if test "x$DGA" = xyes; then
+	XORG_DRIVER_CHECK_EXT(XFreeXDGA, xf86dgaproto)
+	AC_DEFINE(XFreeXDGA, 1, [Support DGA extension])
+fi
+AC_SUBST([DGA])
+AM_CONDITIONAL([DGA], [test "x$DGA" = xyes])
 
 # Obtain compiler/linker options for the driver dependencies
 PKG_CHECK_MODULES(XORG, [xorg-server >= 1.0.99.901] xproto fontsproto $REQUIRED_MODULES)

src/Makefile.am

@@ -33,6 +33,10 @@ dummy_drv_ladir = @moduledir@/drivers
 
 dummy_drv_la_SOURCES = \
          dummy_cursor.c \
-         dummy_dga.c \
          dummy_driver.c \
          dummy.h
+
+if DGA
+dummy_drv_la_SOURCES +=	\
+         dummy_dga.c
+endif

src/dummy_driver.c

@@ -592,7 +592,9 @@ DUMMYScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
 
     xf86SetBlackWhitePixels(pScreen);
 
+#ifdef XFreeXDGA
     DUMMYDGAInit(pScreen);
+#endif
     
     if (dPtr->swCursor)
 	xf86DrvMsg(scrnIndex, X_CONFIG, "Using Software Cursor.\n");