libgl-xlib: enable galahad support

If the GALLIUM_GALAHAD env var is 1 we'll wrap the regular driver with
the galahad validation driver.

src/gallium/targets/libgl-xlib/Makefile

@@ -25,7 +25,8 @@ INCLUDE_DIRS = \
 	$(X11_CFLAGS)
 
 DEFINES += \
-	-DGALLIUM_SOFTPIPE
+	-DGALLIUM_SOFTPIPE \
+	-DGALLIUM_GALAHAD
 #-DGALLIUM_CELL will be defined by the config */
 
 XLIB_TARGET_SOURCES = \

src/gallium/targets/libgl-xlib/SConscript

@@ -48,6 +48,10 @@ if True:
     env.Append(CPPDEFINES = 'GALLIUM_SOFTPIPE')
     env.Prepend(LIBS = [softpipe])
 
+if True:
+    env.Append(CPPDEFINES = 'GALLIUM_GALAHAD')
+    env.Prepend(LIBS = [galahad])
+
 if env['llvm']:
     env.Append(CPPDEFINES = 'GALLIUM_LLVMPIPE')
     env.Tool('udis86')

src/gallium/targets/libgl-xlib/xlib.c

@@ -78,6 +78,10 @@ st_api_create_OpenGL()
 #include "cell/ppu/cell_public.h"
 #endif
 
+#ifdef GALLIUM_GALAHAD
+#include "galahad/glhd_public.h"
+#endif
+
 static struct pipe_screen *
 swrast_create_screen(struct sw_winsys *winsys)
 {
@@ -112,6 +116,14 @@ swrast_create_screen(struct sw_winsys *winsys)
       screen = softpipe_create_screen( winsys );
 #endif
 
+#if defined(GALLIUM_GALAHAD)
+   if (screen) {
+      struct pipe_screen *galahad_screen = galahad_screen_create(screen);
+      if (galahad_screen)
+         screen = galahad_screen;
+   }
+#endif
+
    return screen;
 }