libevent 在Ubuntu1604上编译arm linux gnueabihf7.4版本出错

[ 28%] Built target event_core_static /home/mmm/下载/libevent-master/bufferevent_openssl.c:66:10: fatal error: openssl/ssl.h: 没有那个文件或目录 #include ^~~~~~~~~~~~~~~ compilation terminated. CMakeFiles/event_openssl_shared.dir/build.make:62: recipe for target ‘CMakeFiles/event_openssl_shared.dir