1diff -Npur libevent/CMakeLists.txt libevent-modify/CMakeLists.txt 2--- libevent/CMakeLists.txt 2020-07-05 20:02:46.000000000 +0800 3+++ libevent-modify/CMakeLists.txt 2021-04-19 16:36:57.982307500 +0800 4@@ -852,7 +852,7 @@ if (NOT EVENT__DISABLE_OPENSSL) 5 6 list(APPEND SRC_OPENSSL bufferevent_openssl.c) 7 list(APPEND HDR_PUBLIC include/event2/bufferevent_ssl.h) 8- list(APPEND LIB_APPS ${OPENSSL_LIBRARIES}) 9+ list(APPEND LIB_APPS ${OPENSSL_LIBRARIES} -ldl) 10 endif() 11 12 if (NOT EVENT__DISABLE_THREAD_SUPPORT) 13