* Make Ethernet autonegotiation on INCA-IP work for all clock rates;
  allow selection of clock frequency as "make" target

* Implement memory autosizing code for IceCube boards

* Configure network port on INCA-IP for autonegotiation

* Fix overflow problem in network timeout code

* Patch by Richard Woodruff, 8 Aug 2003:
  Allow crc32 to be used at address 0x000 (crc32_no_comp, too).
diff --git a/tools/Makefile b/tools/Makefile
index ac35ee3..654467d 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -152,6 +152,9 @@
 		$(CC) -g $(CFLAGS) -c $<
 
 subdirs:
+ifeq ($(TOOLSUBDIRS),)
+		@:
+else
 		@for dir in $(TOOLSUBDIRS) ; do \
 		    $(MAKE) \
 			HOSTOS=$(HOSTOS) \
@@ -160,6 +163,8 @@
 		   	HOST_LDFLAGS="$(HOST_LDFLAGS)" \
 			-C $$dir || exit 1 ; \
 		done
+endif
+
 environment.c:
 		ln -s ../common/environment.c environment.c