for ssl static link add ld library link

CMakeLists.txt

@@ -87,6 +87,10 @@ if (OPENSSL_FOUND AND ENABLE_OPENSSL)
     include_directories(${OPENSSL_INCLUDE_DIR})
     add_definitions(-DENABLE_OPENSSL)
     list(APPEND LINK_LIB_LIST ${OPENSSL_LIBRARIES})
+    if (CMAKE_SYSTEM_NAME MATCHES "Linux")
+        list(APPEND LINK_LIB_LIST dl)
+    endif()
+
 else()
     message(WARNING "openssl未找到，rtmp将不支持flash播放器，https/wss/rtsps/rtmps也将失效")
 endif ()