gallium: Make scons build dri/xorg drivers again

src/gallium/targets/SConscript

 	SConscript([
 		'libgl-gdi/SConscript',
 	])
+
+if env['dri']:
+	drienv = env.Clone()
+
+	drienv.Replace(CPPPATH = [
+		'#src/mesa/drivers/dri/common',
+		'#include',
+		'#include/GL/internal',
+		'#src/gallium/include',
+		'#src/gallium/auxiliary',
+		'#src/gallium/drivers',
+		'#src/mesa',
+		'#src/mesa/main',
+		'#src/mesa/glapi',
+		'#src/mesa/math',
+		'#src/mesa/transform',
+		'#src/mesa/shader',
+		'#src/mesa/swrast',
+		'#src/mesa/swrast_setup',
+		'#src/egl/main',
+		'#src/egl/drivers/dri',
+	])
+
+	drienv.ParseConfig('pkg-config --cflags --libs libdrm')
+
+	COMMON_GALLIUM_SOURCES = [
+		'#src/mesa/drivers/dri/common/utils.c',
+		'#src/mesa/drivers/dri/common/vblank.c',
+		'#src/mesa/drivers/dri/common/dri_util.c',
+		'#src/mesa/drivers/dri/common/xmlconfig.c',
+	]
+
+	COMMON_BM_SOURCES = [
+		'#src/mesa/drivers/dri/common/dri_bufmgr.c',
+		'#src/mesa/drivers/dri/common/dri_drmpool.c',
+	]
+
+	Export([
+		'drienv',
+		'COMMON_GALLIUM_SOURCES',
+		'COMMON_BM_SOURCES',
+	])
+
+	if 'vmware' in env['winsys']:
+		SConscript([
+			'dri-vmwgfx/SConscript',
+		])
+
+	if 'intel' in env['winsys']:
+		SConscript([
+			'dri-i915/SConscript',
+		])
+
+	if 'i965' in env['winsys']:
+		SConscript([
+			'dri-i965/SConscript',
+		])
+
+	if 'radeon' in env['winsys']:
+		SConscript([
+			'dri-radeong/SConscript',
+		])
+
+if 'xorg' in env['statetrackers']:
+	if 'vmware' in env['winsys']:
+		SConscript([
+			'xorg-vmwgfx/SConscript',
+		])

src/gallium/targets/dri-vmwgfx/SConscript

-import os
-import os.path
-
 Import('*')
 
-if env['platform'] == 'linux':
-
-   if env['dri']:
-      env = env.Clone()
-
-      sources = [
-        '#/src/mesa/drivers/dri/common/utils.c',
-        '#/src/mesa/drivers/dri/common/vblank.c',
-        '#/src/mesa/drivers/dri/common/dri_util.c',
-        '#/src/mesa/drivers/dri/common/xmlconfig.c',
-         ]
-   
-      
-      env.ParseConfig('pkg-config --cflags --libs libdrm')
-      
-      env.Prepend(CPPPATH = [
-            '#/src/mesa/state_tracker',
-            '#/src/mesa/drivers/dri/common',
-            '#/src/mesa/main',
-            '#/src/mesa/glapi',
-            '#/src/mesa',
-            '#/include',
-            '#/src/gallium/drivers/svga',
-            '#/src/gallium/drivers/svga/include',
-            ])
-      
-      env.Append(CPPDEFINES = [
-            'HAVE_STDINT_H', 
-            'HAVE_SYS_TYPES_H',
-            ])
+env = drienv.Clone()
 
-      env.Append(CFLAGS = [
-            '-std=gnu99',
-            '-D_FILE_OFFSET_BITS=64',
-            ])
-      
-      env.Prepend(LIBPATH = [
-            ])
-      
-      env.Prepend(LIBS = [
-            trace,
-            st_dri,
-            svgadrm,
-            svga,
-            mesa,
-            glsl,
-            gallium,
-            ])
-      
-      # TODO: write a wrapper function http://www.scons.org/wiki/WrapperFunctions
-      env.LoadableModule(
-         target ='vmwgfx_dri.so',
-         source = sources,
-         LIBS = env['LIBS'],
-         SHLIBPREFIX = '',
-         )
-      
+drivers = [
+	trace,
+	st_dri,
+	svgadrm,
+	svga,
+	mesa,
+	glsl,
+	gallium,
+]
 
+env.LoadableModule(
+    target ='vmwgfx_dri.so',
+    source = COMMON_GALLIUM_SOURCES,
+    LIBS = drivers + mesa + gallium + env['LIBS'],
+    SHLIBPREFIX = '',
+)

src/gallium/winsys/SConscript

 	SConscript([
 		'sw/gdi/SConscript',
 	])
+
+if env['dri']:
+	if 'vmware' in env['winsys']:
+		SConscript([
+			'svga/drm/SConscript',
+		])
+
+	if 'intel' in env['winsys']:
+		SConscript([
+			'i915/drm/SConscript',
+		])
+
+	if 'i965' in env['winsys']:
+		SConscript([
+			'i965/drm/SConscript',
+		])
+
+	if 'radeon' in env['winsys']:
+		SConscript([
+			'radeon/drm/SConscript',
+		])

src/gallium/winsys/i915/drm/SConscript

 Import('*')
 
-env = drienv.Clone()
+env = env.Clone()
 
 inteldrm_sources = [
     'intel_drm_api.c',

src/gallium/winsys/i965/drm/SConscript

 Import('*')
 
-env = drienv.Clone()
+env = env.Clone()
 
 i965drm_sources = [
     'i965_drm_api.c',

src/gallium/winsys/radeon/drm/SConscript

 Import('*')
 
-env = drienv.Clone()
+env = env.Clone()
 
 radeon_sources = [
     'radeon_drm_buffer.c',