Fast C++ logging library

Copy the include folder to your build tree and use a C++11 compiler.

$ git clone https://github.com/gabime/spdlog.git
$ cd spdlog && mkdir build && cd build
$ cmake .. && cmake --build .

see example CMakeLists.txt on how to use.

• Linux, FreeBSD, OpenBSD, Solaris, AIX
• Windows (msvc 2013+, cygwin)
• macOS (clang 3.5+)
• Android

• Debian: sudo apt install libspdlog-dev
• Homebrew: brew install spdlog
• MacPorts: sudo port install spdlog
• FreeBSD: pkg install spdlog
• Fedora: dnf install spdlog
• Gentoo: emerge dev-libs/spdlog
• Arch Linux: pacman -S spdlog
• openSUSE: sudo zypper in spdlog-devel
• ALT Linux: apt-get install libspdlog-devel
• vcpkg: vcpkg install spdlog
• conan: conan install --requires=spdlog/[*]
• conda: conda install -c conda-forge spdlog
• build2: depends: spdlog ^1.8.2

• Very fast (see benchmarks below).
• Headers only or compiled
• Feature-rich formatting, using the excellent fmt library.
• Asynchronous mode (optional)
• Custom formatting.
• Multi/Single threaded loggers.
• Various log targets:
  • Rotating log files.
  • Daily log files.
  • Console logging (colors supported).
  • syslog.
  • Windows event log.
  • Windows debugger (OutputDebugString(..)).
  • Log to Qt widgets (example).
  • Easily extendable with custom log targets.
• Log filtering - log levels can be modified at runtime as well as compile time.
• Support for loading log levels from argv or environment var.
• Backtrace support - store debug messages in a ring buffer and display them later on demand.

#include "spdlog/spdlog.h"

int main() 
{
    spdlog::info("Welcome to spdlog!");
    spdlog::error("Some error message with arg: {}", 1);
    
    spdlog::warn("Easy padding in numbers like {:08d}", 12);
    spdlog::critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
    spdlog::info("Support for floats {:03.2f}", 1.23456);
    spdlog::info