build issue on FedoraOS33 with latest cmake and libc installed well

[gaowayne]

root@smfast:~/wayne/braft/bld# cmake ..
CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.

-- The C compiler identification is GNU 10.3.1
-- The CXX compiler identification is GNU 10.3.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Could NOT find Protobuf (missing: Protobuf_LIBRARIES Protobuf_INCLUDE_DIR) 
CMake Error at CMakeLists.txt:47 (message):
  Fail to find leveldb

-- Configuring incomplete, errors occurred!
See also "/root/wayne/braft/bld/CMakeFiles/CMakeOutput.log".
See also "/root/wayne/braft/bld/CMakeFiles/CMakeError.log".

[gaowayne]

above build error is solved. I see new example run error. how to run example guide is outdated.

root@smfast:~/wayne/braft/example/atomic/build# ls
atomic_client  atomic.pb.h    atomic_test     CMakeFiles           Makefile       run_server.sh
atomic.pb.cc   atomic_server  CMakeCache.txt  cmake_install.cmake  run_client.sh  runtime
root@smfast:~/wayne/braft/example/atomic/build# ./atomic_server -h
ERROR: flag 'v' was defined more than once (in files 'src/vlog_is_on.cc' and '/root/wayne/incubator-brpc/src/butil/logging.cc').
root@smfast:~/wayne/braft/example/atomic/build# ./atomic_server
ERROR: flag 'v' was defined more than once (in files 'src/vlog_is_on.cc' and '/root/wayne/incubator-brpc/src/butil/logging.cc').
root@smfast:~/wayne/braft/example/atomic/build#