+if USE_ACCELERATED_COMPOSITING
+global_cppflags += \
+ -DWTF_USE_ACCELERATED_COMPOSITING=1 \
+ -DENABLE_3D_RENDERING=1
+endif
+
+if USE_TEXTURE_MAPPER_CAIRO
+global_cppflags += \
+ -DWTF_USE_TEXTURE_MAPPER=1 \
+ -DWTF_USE_TEXTURE_MAPPER_CAIRO=1
+endif
+
+if USE_TEXTURE_MAPPER_GL
+global_cppflags += \
+ -DWTF_USE_TEXTURE_MAPPER=1 \
+ -DWTF_USE_TEXTURE_MAPPER_GL=1
+endif
+
+if USE_CLUTTER
+global_cppflags += \
+ -DWTF_USE_CLUTTER=1
+endif
+
+if USE_GLX
+global_cppflags += \
+ -DWTF_USE_GLX=1
+endif
+
+if USE_OPENGL
+global_cppflags += \
+ -DWTF_USE_OPENGL=1
+endif
+