+# ----- si test builds -------------------------------------------------------------
+
+%_si : %.c
+ gcc -I $${C_INCLUDE_PATH:-.} $< -g -o $@ -lrmr_si -lpthread -lm
+
+# explicit rule because there is no mt_recever.c
+mt_receiver_si: receiver.c
+ gcc -I $${C_INCLUDE_PATH:-.} -DMTC $< -g -o $@ -lrmr_si -lpthread -lm
+
+
+# --------- housekeeping -----------------------------------------------------------
+
+# clean removes intermediates; nuke removes everything that can be built
+.PHONY: clean nuke