+# If usescons=something then reroute to scons if user is using that.
+ifdef usescons
+
+SCONS_USER = $(wildcard $(depth)/.sconsign)
+ifeq ($(SCONS_USER),)
+SCONS_USER = $(wildcard $(depth)/.sconf_temp)
+endif
+ifneq ($(SCONS_USER),)
+
+ifeq ($(strip $(depth)),..)
+here = $(notdir $(CURDIR))
+else
+ifeq ($(strip $(depth)),../..)
+# ZUCHT?
+# here = $(notdir $(dir $(CURDIR)))/$(notdir $(CURDIR))
+here = $(shell basename $$(dirname $(CURDIR)))/$(notdir $(CURDIR))
+endif
+endif
+
+MAKE_TARGETS = config deb diff dist distclean doc release po \
+po-replace po-update all clean check default exe help install lib web \
+web-install web-clean TAGS
+
+$(MAKE_TARGETS): scons
+
+# To make this trickery complete, we could have ./configure remove
+# traces of scons configuration.
+scons:
+ @echo "warning: $(SCONS_USER) detected, rerouting to scons"
+ cd $(depth) && scons $(here) $(MAKECMDGOALS)
+ false
+endif
+endif
+
+