AUDIO_DIRS =
endif
-SUBDIRS = $(AUDIO_DIRS) Bucket Debug DEM Math PUI XGL zlib
+if ENABLE_UNIX_SERIAL
+SERIAL_DIRS = Serial
+else
+SERIAL_DIRS =
+endif
+
+SUBDIRS = \
+ $(AUDIO_DIRS) \
+ Bucket \
+ Debug \
+ DEM \
+ gpc \
+ Math \
+ Misc \
+ PUI \
+ $(SERIAL_DIRS) \
+ XGL\
+ zlib