/usr/bin/ld: cannot find -lramcloud

[caisan]

cc -I/usr/include/python2.7 -O3 -Wall  -o wheatserver config.o net.o log.o wstr.o list.o dict.o hook.o sig.o networking.o util.o register.o stats.o event.o setproctitle.o slice.o debug.o portable.o memalloc.o array.o app/application.o protocol/protocol.o worker/mbuf.o worker/worker.o modules.o app/wsgi/app_wsgi.o app/wsgi/wsgiwrapper.o app/wsgi/wsgiinput.o app/static/app_static_file.o app/wheatredis/redis.o app/wheatredis/hashkit.o app/wheatredis/md5.o app/wheatredis/redis_config.o app/ramcloud/app_ramcloud.o protocol/http/http_parser.o protocol/http/proto_http.o protocol/memcache/proto_memcache.o protocol/redis/proto_redis.o worker/worker_sync.o worker/worker_async.o wheatserver.o -lpython2.7 -lramcloud
/usr/bin/ld: cannot find -lramcloud
collect2: error: ld returned 1 exit status
make[1]: *** [wheatserver] Error 1
make[1]: Leaving directory `/root/code/wheatserver/src'
make: *** [all] Error 2

i know ramcloud, So is there something like ramcloud-dev i have missed ?
how can i slove this problem, thanks advance.