glog with gflags

CMakeLists.txt

cmake_minimum_required(VERSION 3.10)

# set the project name
project(useGlog)

find_package(gflags REQUIRED)
find_package(glog REQUIRED)

INCLUDE_DIRECTORIES(${GLOG_INCLUDE_DIR})

# add the executable
add_executable(example example.cpp)

# https://github.com/gflags/example/blob/6768ef36b9b47c8a26d0402a88b3165e3961d7fb/foo/CMakeLists.txt#L1-L14
# target_link_libraries(example gflags::gflags glog::glog)
target_link_libraries(example gflags glog::glog)

example.cpp

#include "glog/logging.h"
#include <gflags/gflags.h>

int main(int argc, char *argv[])
{
	// Initialize Google's logging library.
	google::InitGoogleLogging(argv[0]);
	google::ParseCommandLineFlags(&argc, &argv, true);
	FLAGS_colorlogtostderr = 1;
	// FLAGS_alsologtostderr = 1;

	LOG(INFO) << "There is info";
    LOG(WARNING) << "There is warning";
    LOG(ERROR) << "There is error !!!";
    LOG(WARNING) << "There is another warning";

	for (int i = 0; i < 20; i++)
	{
		LOG_IF(INFO, i > 15) << i << ">15"; //When I > 15, Log
	}

	google::ShutdownGoogleLogging();

	return 0;
}

output.txt

anon@myserver:~/maze/useGlog/build$ ./example 
  E20210824 22:58:20.879582 997166 example.cpp:14] There is error !!!
anon@myserver:~/maze/useGlog/build$ ./example --logtostderr=1
  I20210824 22:58:48.791034 998166 example.cpp:12] There is info
  W20210824 22:58:48.791204 998166 example.cpp:13] There is warning
  E20210824 22:58:48.791260 998166 example.cpp:14] There is error !!!
  W20210824 22:58:48.791302 998166 example.cpp:15] There is another warning
  I20210824 22:58:48.791342 998166 example.cpp:19] 16>15
  I20210824 22:58:48.791364 998166 example.cpp:19] 17>15
  I20210824 22:58:48.791386 998166 example.cpp:19] 18>15
  I20210824 22:58:48.791407 998166 example.cpp:19] 19>15