spdlog linux编译出错,c++日志库spdlog

/*需要包含的头文件*/

#include "spdlog/spdlog.h"

#include // EXIT_FAILURE

#include

#include

void async_example();

void syslog_example();

namespace spd = spdlog;

int main(int, char*[])

{

try

{

/*输出到控制台的日志，线程安全*/

// Multithreaded color console

auto console = spd::stdout_logger_mt("console", true);

console->info("Welcome to spdlog!");

console->error("An info message example {}..", 1);

/*支持数据格式化输出*/

// Formatting examples

console->warn("Easy padding in numbers like {:08d}", 12);

console->critical("Support for int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}", 42);

console->info("Support for floats {:03.2f}", 1.23456);

console->info("Positional args are {1} {0}..", "too", "supported");

console->info("{:<30}", "left aligned");

console->info("{:>30}", "right aligned");

console->info("{:^30}", "centered");

spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");

// Runtime log levels

/*运行时调整全局日志输出等级*/

spd::set_level(spd::level::info); //Set global log level to info

/*这条日志不会输出，debug没有达到输出等级*/

console->debug("This message shold not be displayed!");

/*调整日志输出等级*/

console->set_level(spd::level::debug); // Set specific logger's log level

/*输出debug日志*/

console->debug("This message shold be displayed..");

/*输出到文件的日志*/

// Create basic file logger (not rotated)

auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic.txt");

my_logger->info("Some log message");

/*创建环形输出日志*/

// Create a file rotating logger with 5mb size max and 3 rotated files

auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/mylogfile", 1048576 * 5, 3);

for (int i = 0; i < 10; ++i)

rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);

/*每天2:30分创建新日志文件的日志*/

// Create a daily logger - a new file is created every day on 2:30am

auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily", 2, 30);

daily_logger->info(123.44);

// Customize msg format for all messages

/*调整日志输出格式*/

spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");

rotating_logger->info("This is another message with custom format");

/*根据宏来判定是否输出日志*/

// Compile time debug or trace macros.

// Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON

SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);

SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);

// Asynchronous logging is very fast..

// Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..

/*异步模式日志，非常快……*/

async_example();

// syslog example. linux/osx only..

/*linux/osx下的syslog日志*/

syslog_example();

/*关闭所有日志*/

// Release and close all loggers

spdlog::drop_all();

}

catch (const spd::spdlog_ex& ex)

{

std::cout << "Log failed: " << ex.what() << std::endl;

return EXIT_FAILURE;

}

return EXIT_SUCCESS;

}

/*异步模式日志例子*/

void async_example()

{

size_t q_size = 4096; //queue size must be power of 2

spdlog::set_async_mode(q_size);

auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");

for (int i = 0; i < 100; ++i)

async_file->info("Async message #{}", i);

}

/*syslog日志例子*/

//syslog example (linux/osx only)

void syslog_example()

{

#if defined (__linux__) || defined(__APPLE__)

std::string ident = "spdlog-example";

auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);

syslog_logger->warn("This is warning that will end up in syslog. This is Linux only!");

#endif

}