i have installed libevent2 by yum on my centos7, but when i run configure, it still said not found: $ rpm -aql libevent /usr/lib64/libevent-2.0.so.5 /usr/lib64/libevent-2.0.so.5.1.9 /usr/lib64/libevent_core-2.0.so.5 /usr/lib64/libevent_core-2.0.so.5.1.9 /usr/lib64/...