spdlog linux编译出错,spdlog「建议收藏」

#include

#include “spdlog/spdlog.h”

int main(int, char* [])

{

namespace spd = spdlog;

try {

// console logger (multithreaded and with color)

auto console = spd::stdout_logger_mt(“console”, true);

console->info(“Welcome to spdlog!”) ;

console->info(“An info message example {}..”, 1);

console->info() << “Streams are supported too ” << 1;

//Formatting examples

console->info(“Easy padding in numbers like {:08d}”, 12);

console->info(“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”);

//

// Runtime log levels

//

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

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

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

console->debug(“Now it should..”);

//

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

//

auto file_logger = spd::rotating_logger_mt(“file_logger”, “logs/mylogfile”, 1048576 * 5, 3);

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

file_logger->info(“{} * {} equals {:>10}”, i, i, i * i);

//

// 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);

//

// Customize msg format for all messages

//

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

file_logger->info(“This is another message with custom format”);

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

//

// 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..

//

size_t q_size = 1048576; //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”);

async_file->info() << “This is async log..” << “Should be very fast!”;

//

// syslog example. linux only..

//

#ifdef __linux__

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

} catch (const spd::spdlog_ex& ex) {

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

}

}

// Example of user defined class with operator<<

class some_class {};

std::ostream& operator<

{

return os << “some_class”;

}

void custom_class_example()

{

some_class c;

spdlog::get(“console”)->info(“custom class with operator<<: c>

spdlog::get(“console”)->info() << “custom class with operator<<: c>

}