[Click] Error while installing click on the Emulab

[donghong.qin]

Hallo,

I want to install the click-1.8.0 into my Emulab nodes, whose OS are FC6-STD(linux kernel 2.4.20), but after I try to make -j2 there are the 
following error message:

make[1]: Entering directory `/users/henry/source/click-1.8.0/tools'
make[1]: Entering directory `/users/henry/source/click-1.8.0/userlevel'
echo "userlevel  analysis app aqm ethernet icmp ip local simple standard tcpudp test threads" | ../click-buildtool findelem -r userlevel -p .. -X 
./elements.exclude > elements.conf
make[2]: Entering directory `/users/henry/source/click-1.8.0/tools/lib'
make[2]: *** No rule to make target `/usr/include/machine/ansi.h', needed by `string.o'.  Stop.
make[2]: Leaving directory `/users/henry/source/click-1.8.0/tools/lib'
make[1]: *** [lib] Error 2
make[1]: Leaving directory `/users/henry/source/click-1.8.0/tools'
make: *** [tools] Error 2
make: *** Waiting for unfinished jobs....
../click-buildtool elem2make -x "addressinfo.o alignmentinfo.o errorelement.o portinfo.o scheduleinfo.o" < elements.conf > elements.mk
make[1]: Leaving directory `/users/henry/source/click-1.8.0/userlevel'
make[1]: Entering directory `/users/henry/source/click-1.8.0/userlevel'
make[1]: *** No rule to make target `/usr/include/machine/ansi.h', needed by `string.o'.  Stop.
make[1]: Leaving directory `/users/henry/source/click-1.8.0/userlevel'
make: *** [userlevel] Error 2

I would appreciate any help or tips.

Best,
Henry