1 下载安装glog
1 Git clone https://github.com/google/glog.git
2 cd glog
3 ./autogen.sh
4 ./configure --prefix=path(install)
5 make
6 make install
2 在CMakeLists.txt中添加glog
find_package(Glog REQUIRED)
include_directories(
${GLOG_INCLUDE_DIRS}
)
## 把glog链接到库${PROJECT_LIB_NAME}中
target_link_libraries(${PROJECT_LIB_NAME} glog)
3. 在C++ main函数中初始化配置glog
// 扑捉到程序崩溃或者中断时,把相应的信息打印到log文件和输出到屏幕。
void SignalHandler(const char *data, int size) {
std::string glog_file = "./log/error.log";
std::ofstream fs(glog_file, std::ios::app);
std::string str = std::string(data, size);
fs << str;
fs.close();
LOG(INFO) << str;
}
int main(int argc, char **argv) {
FLAGS_colorlogtostderr = true; // log信息区分颜色
FLAGS_logtostderr = 1; // 允许log信息打印到屏幕
google::SetStderrLogging(google::GLOG_INFO); // 输出log的最低等级是 INFO (可以设置为WARNING或者更高)
google::InstallFailureSignalHandler(); // 配置安装程序崩溃失败信号处理器
google::InstallFailureWriter(&SignalHandler); // 安装配置程序失败信号的信息打印过程,设置回调函数
google::InitGoogleLogging((const char *)argv[0]); // 用当前可执行程序初始化glog
// 下面测试glog
LOG(INFO) << "this is info.";
LOG(WARNING) << "this is warning.";
LOG(ERROR) <<"this is error.";
google::SetStderrLogging(google::GLOG_WARNING); // 提高log输出等级为WARNING
LOG(INFO) << "this is info.";
LOG(WARNING) << "this is warning.";
LOG(ERROR) <<"this is error.";
// test
int i = 0;
int k = 10/i;
}
e