.gitattributes

+* text=false

.gitignore

@@ -34,6 +34,9 @@ build/*
 # Codelite
 .codelite
 
+# KDevelop
+*.kdev4
+
 # .orig files
 *.orig
 
@@ -46,6 +49,7 @@ example/*
 !example/example.sln
 !example/example.vcxproj
 !example/CMakeLists.txt
+!example/meson.build
 !example/multisink.cpp
 !example/jni
 
@@ -66,3 +70,14 @@ install_manifest.txt
 
 # idea
 .idea/
+cmake-build-*/
+*.db
+*.ipch
+*.filters
+*.db-wal
+*.opendb
+*.db-shm
+*.vcxproj
+*.tcl
+*.user
+*.sln

.travis.yml

@@ -5,6 +5,7 @@
 sudo: required
 language: cpp
 
+# gcc 4.8
 addons: &gcc48
   apt:
     packages:
@@ -12,6 +13,7 @@ addons: &gcc48
     sources:
       - ubuntu-toolchain-r-test
 
+# gcc 7.0
 addons: &gcc7
   apt:
     packages:
@@ -19,6 +21,7 @@ addons: &gcc7
     sources:
       - ubuntu-toolchain-r-test
 
+# Clang 3.5
 addons: &clang35
   apt:
     packages:
@@ -27,13 +30,15 @@ addons: &clang35
       - ubuntu-toolchain-r-test
       - llvm-toolchain-precise-3.5
       
-addons: &clang6
+# Clang 7.0
+addons: &clang70
   apt:
     packages:
-      - clang-6.0
+      - clang-7      
     sources:
       - ubuntu-toolchain-r-test
-      - llvm-toolchain-trusty-6.0
+      - llvm-toolchain-trusty-7
+
 
 
 matrix:
@@ -60,23 +65,12 @@ matrix:
       os: linux
       addons: *clang35
 
-      # Test clang-6.0: C++11, Build=Debug, ASAN=On
-    - env: CLANG_VERSION=6.0 BUILD_TYPE=Debug CPP=11 ASAN=On TSAN=Off
-      os: linux
-      addons: *clang6
+      # Test clang-7.0: C++11, Build=Debug, ASAN=On
+    - env: CLANG_VERSION=7 BUILD_TYPE=Debug CPP=11 ASAN=On TSAN=Off
+      dist: bionic      
 
-    - env: CLANG_VERSION=6.0 BUILD_TYPE=Release CPP=11 ASAN=On TSAN=Off
-      os: linux
-      addons: *clang6
-      
-      # Test clang-6.0: C++11, Build=Debug, TSAN=On
-    - env: CLANG_VERSION=6.0 BUILD_TYPE=Debug CPP=11 ASAN=Off TSAN=On
-      os: linux
-      addons: *clang6
-      
-    - env: CLANG_VERSION=6.0 BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=On
-      os: linux
-      addons: *clang6
+    - env: CLANG_VERSION=7 BUILD_TYPE=Release CPP=11 ASAN=On TSAN=Off
+      dist: bionic
       
       # osx
     - env: BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=Off
@@ -84,7 +78,6 @@ matrix:
 
 
 
-
 before_script:
   - if [ -n "$GCC_VERSION" ]; then export CXX="g++-${GCC_VERSION}" CC="gcc-${GCC_VERSION}"; fi
   - if [ -n "$CLANG_VERSION" ]; then export CXX="clang++-${CLANG_VERSION}" CC="clang-${CLANG_VERSION}"; fi
@@ -102,11 +95,13 @@ script:
       --warn-uninitialized \
       -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
       -DCMAKE_CXX_STANDARD=$CPP \
-      -DSPDLOG_BUILD_EXAMPLES=ON \
+      -DSPDLOG_BUILD_EXAMPLE=ON \
+      -DSPDLOG_BUILD_EXAMPLE_HO=ON \
       -DSPDLOG_BUILD_BENCH=OFF \
       -DSPDLOG_BUILD_TESTS=ON \
-      -DSPDLOG_SANITIZE_ADDRESS=$ASAN \
-      -DSPDLOG_SANITIZE_THREAD=$TSAN
+      -DSPDLOG_BUILD_TESTS_HO=OFf \
+      -DSPDLOG_SANITIZE_ADDRESS=$ASAN 
+      
   - make VERBOSE=1 -j2
   - ctest -j2 --output-on-failure
 

CMakeLists.txt

-#
-# Copyright(c) 2015 Ruslan Baratov.
+# Copyright(c) 2019 spdlog authors
 # Distributed under the MIT License (http://opensource.org/licenses/MIT)
-#
 
-cmake_minimum_required(VERSION 3.1)
-project(spdlog VERSION 1.3.1 LANGUAGES CXX)
-include(CMakeDependentOption)
+cmake_minimum_required(VERSION 3.2)
+
+#---------------------------------------------------------------------------------------
+# Start spdlog project
+#---------------------------------------------------------------------------------------
 include(GNUInstallDirs)
+include(cmake/utils.cmake)
+include(cmake/ide.cmake)
+
+spdlog_extract_version()
 
 #---------------------------------------------------------------------------------------
-# set default build to release
+# Set default build to release
 #---------------------------------------------------------------------------------------
 if(NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose Release or Debug" FORCE)
 endif()
 
-message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
+project(spdlog VERSION ${SPDLOG_VERSION} LANGUAGES CXX)
+message(STATUS "Build spdlog: ${SPDLOG_VERSION}")
 
 #---------------------------------------------------------------------------------------
-# compiler config
+# Compiler config
 #---------------------------------------------------------------------------------------
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
-if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-    add_compile_options("-Wall")
-    add_compile_options("-Wextra")
-    add_compile_options("-Wconversion")
-    add_compile_options("-pedantic")
-    add_compile_options("-Wfatal-errors")
+#---------------------------------------------------------------------------------------
+# Set SPDLOG_MASTER_PROJECT to ON if we are building spdlog
+#---------------------------------------------------------------------------------------
+# Check if spdlog is being used directly or via add_subdirectory, but allow overriding
+if (NOT DEFINED SPDLOG_MASTER_PROJECT)
+    if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+        set(SPDLOG_MASTER_PROJECT ON)
+    else()
+        set(SPDLOG_MASTER_PROJECT OFF)
+    endif()
+endif ()
 
+# build shared option
+if(NOT WIN32)
+    option(SPDLOG_BUILD_SHARED "Build shared library" OFF)
 endif()
 
+# example options
+option(SPDLOG_BUILD_EXAMPLE "Build example" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_EXAMPLE_HO "Build header only example" OFF)
+
+# testing options
+option(SPDLOG_BUILD_TESTS "Build tests" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_TESTS_HO "Build tests using the header only version" OFF)
+
+# bench options
+option(SPDLOG_BUILD_BENCH "Build benchmarks (Requires https://github.com/google/benchmark.git to be installed)" OFF)
+
+# sanitizer options
+option(SPDLOG_SANITIZE_ADDRESS "Enable address sanitizer in tests" OFF)
+
+# install options
+option(SPDLOG_INSTALL "Generate the install target" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_FMT_EXTERNAL "Use external fmt library instead of bundled" OFF)
+
+if(WIN32)
+	option(SPDLOG_WCHAR_SUPPORT "Support wchar api" OFF)
+endif()
+
+option(SPDLOG_NO_EXCEPTIONS "Compile with -fno-exceptions. Call abort() on any spdlog exceptions" OFF)
+
+
+find_package(Threads REQUIRED)
+
+message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
+
 #---------------------------------------------------------------------------------------
-# address sanitizers check
+# Static/Shared library (shared not supported in windows yet)
 #---------------------------------------------------------------------------------------
-include(cmake/sanitizers.cmake)
+set(SPDLOG_SRCS
+        src/spdlog.cpp
+        src/stdout_sinks.cpp
+        src/fmt.cpp
+        src/color_sinks.cpp
+        src/file_sinks.cpp
+        src/async.cpp)
+
+set(SPDLOG_CFLAGS "${PROJECT_NAME}")
+
+if (SPDLOG_BUILD_SHARED)
+    if(WIN32)
+        message(FATAL_ERROR "spdlog shared lib is not yet supported under windows")
+    endif()
+    add_library(spdlog SHARED ${SPDLOG_SRCS} ${SPDLOG_ALL_HEADERS})
+else()
+    add_library(spdlog STATIC ${SPDLOG_SRCS} ${SPDLOG_ALL_HEADERS})
+endif()
+
+add_library(spdlog::spdlog ALIAS spdlog)
+
+target_compile_definitions(spdlog PUBLIC SPDLOG_COMPILED_LIB)
+target_include_directories(spdlog PUBLIC
+        "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
+        "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
+target_link_libraries(spdlog PUBLIC Threads::Threads)
+spdlog_enable_warnings(spdlog)
+
+set_target_properties(spdlog PROPERTIES VERSION ${SPDLOG_VERSION} SOVERSION ${SPDLOG_VERSION_MAJOR})
+set_target_properties(spdlog PROPERTIES DEBUG_POSTFIX d)
 
 #---------------------------------------------------------------------------------------
-# spdlog target
+# Header only version
 #---------------------------------------------------------------------------------------
-add_library(spdlog INTERFACE)
-add_library(spdlog::spdlog ALIAS spdlog)
+add_library(spdlog_header_only INTERFACE)
+add_library(spdlog::spdlog_header_only ALIAS spdlog_header_only)
 
-# Check if spdlog is being used directly or via add_subdirectory
-set(SPDLOG_MASTER_PROJECT OFF)
-if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
-  set(SPDLOG_MASTER_PROJECT ON)
-endif()
+target_include_directories(spdlog_header_only INTERFACE
+        "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
+        "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
+target_link_libraries(spdlog_header_only INTERFACE Threads::Threads)
 
-option(SPDLOG_BUILD_EXAMPLES "Build examples" ${SPDLOG_MASTER_PROJECT})
-option(SPDLOG_BUILD_BENCH "Build benchmarks" ${SPDLOG_MASTER_PROJECT})
-option(SPDLOG_BUILD_TESTS "Build tests" ${SPDLOG_MASTER_PROJECT})
-option(SPDLOG_FMT_EXTERNAL "Use external fmt library instead of bundled" OFF)
 
+#---------------------------------------------------------------------------------------
+# Use fmt package if using exertnal fmt
+#---------------------------------------------------------------------------------------
 if(SPDLOG_FMT_EXTERNAL)
-    find_package(fmt REQUIRED CONFIG)
+    if (NOT TARGET fmt::fmt)
+        find_package(fmt REQUIRED)
     endif ()
 
-target_include_directories(
-    spdlog
-    INTERFACE
-    "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
-    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
-)
+    set(SPDLOG_CFLAGS "${SPDLOG_CFLAGS} -DSPDLOG_FMT_EXTERNAL")
 
-if(SPDLOG_FMT_EXTERNAL)
-    target_compile_definitions(spdlog INTERFACE SPDLOG_FMT_EXTERNAL)
-    target_link_libraries(spdlog INTERFACE fmt::fmt)
+    target_compile_definitions(spdlog PUBLIC SPDLOG_FMT_EXTERNAL)
+    target_link_libraries(spdlog PUBLIC fmt::fmt)
+
+    target_compile_definitions(spdlog_header_only INTERFACE SPDLOG_FMT_EXTERNAL)
+    target_link_libraries(spdlog_header_only INTERFACE fmt::fmt)
+endif()
+
+if(SPDLOG_WCHAR_SUPPORT)
+	target_compile_definitions(spdlog PUBLIC SPDLOG_WCHAR_TO_UTF8_SUPPORT)
+	target_compile_definitions(spdlog_header_only INTERFACE SPDLOG_WCHAR_TO_UTF8_SUPPORT)
+ endif()
+
+ if(SPDLOG_NO_EXCEPTIONS)
+	target_compile_definitions(spdlog PUBLIC SPDLOG_NO_EXCEPTIONS)	
+
+	target_compile_definitions(spdlog_header_only INTERFACE SPDLOG_NO_EXCEPTIONS)
+
+    if(NOT MSVC)
+        target_compile_options(spdlog PRIVATE -fno-exceptions)
+    endif()
 endif()
 
-set(HEADER_BASE "${CMAKE_CURRENT_SOURCE_DIR}/include")
 
-if(SPDLOG_BUILD_EXAMPLES)
+#---------------------------------------------------------------------------------------
+# Build binaries
+#---------------------------------------------------------------------------------------
+if(SPDLOG_BUILD_EXAMPLE OR SPDLOG_BUILD_EXAMPLE_HO)
+    message(STATUS "Generating examples")
     add_subdirectory(example)
 endif()
 
-if(SPDLOG_BUILD_TESTS)
-    include(CTest)
+if(SPDLOG_BUILD_TESTS OR SPDLOG_BUILD_TESTS_HO)
+    message(STATUS "Generating tests")
+    enable_testing()
     add_subdirectory(tests)
 endif()
 
 if(SPDLOG_BUILD_BENCH)
+    message(STATUS "Generating benchmarks")
     add_subdirectory(bench)
 endif()
 
 #---------------------------------------------------------------------------------------
-# Install/export targets and files
+# Install
 #---------------------------------------------------------------------------------------
-# set files and directories
-set(config_install_dir "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
-set(include_install_dir "${CMAKE_INSTALL_INCLUDEDIR}")
+if (SPDLOG_INSTALL)
+    message(STATUS "Generating install")
+    set(project_config_in "${CMAKE_CURRENT_LIST_DIR}/cmake/spdlogConfig.cmake.in")
+    set(project_config_out "${CMAKE_CURRENT_BINARY_DIR}/spdlogConfig.cmake")
+    set(config_targets_file "spdlogConfigTargets.cmake")
+    set(version_config_file "${CMAKE_CURRENT_BINARY_DIR}/spdlogConfigVersion.cmake")
+    set(export_dest_dir "${CMAKE_INSTALL_LIBDIR}/spdlog/cmake")
     set(pkgconfig_install_dir "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-set(version_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
-set(project_config "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake")
-set(targets_config "${PROJECT_NAME}Targets.cmake")
     set(pkg_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}.pc")
-set(targets_export_name "${PROJECT_NAME}Targets")
-set(namespace "${PROJECT_NAME}::")
 
-# generate package version file
+    #---------------------------------------------------------------------------------------
+    # Include files
+    #---------------------------------------------------------------------------------------
+    install(DIRECTORY include/ DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}" PATTERN "fmt/bundled" EXCLUDE)
+    install(TARGETS spdlog spdlog_header_only EXPORT spdlog DESTINATION "${CMAKE_INSTALL_LIBDIR}/spdlog")
+
+    if(NOT SPDLOG_FMT_EXTERNAL)
+        install(DIRECTORY include/${PROJECT_NAME}/fmt/bundled/
+                DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}/fmt/bundled/")
+    endif()
+
+    #---------------------------------------------------------------------------------------
+    # Package and version files
+    #---------------------------------------------------------------------------------------
+    configure_file("cmake/${PROJECT_NAME}.pc.in" "${pkg_config}" @ONLY)
+    install(FILES "${pkg_config}" DESTINATION "${pkgconfig_install_dir}")
+
+    install(EXPORT spdlog
+            DESTINATION ${export_dest_dir}
+            NAMESPACE spdlog::
+            FILE ${config_targets_file})
+
     include(CMakePackageConfigHelpers)
-write_basic_package_version_file(
-    "${version_config}" COMPATIBILITY SameMajorVersion
-)
-
-# configure pkg config file
-configure_file("cmake/spdlog.pc.in" "${pkg_config}" @ONLY)
-# configure spdlogConfig.cmake file
-configure_file("cmake/Config.cmake.in" "${project_config}" @ONLY)
-
-# install targets
-install(
-    TARGETS spdlog
-    EXPORT "${targets_export_name}"
-)
-
-# install headers
-install(
-    DIRECTORY "${HEADER_BASE}/${PROJECT_NAME}"
-    DESTINATION "${include_install_dir}"
-)
-
-# install project config and version file
-install(
-    FILES "${project_config}" "${version_config}"
-    DESTINATION "${config_install_dir}"
-)
-
-# install pkg config file
-install(
-    FILES "${pkg_config}"
-    DESTINATION "${pkgconfig_install_dir}"
-)
-
-# install targets config file
-install(
-    EXPORT "${targets_export_name}"
-    NAMESPACE "${namespace}"
-    DESTINATION "${config_install_dir}"
-    FILE ${targets_config}
-)
-
-# export build directory targets file
-export(
-    EXPORT ${targets_export_name}
-    NAMESPACE "${namespace}"
-    FILE ${targets_config}
-)
-
-# register project in CMake user registry
-export(PACKAGE ${PROJECT_NAME})
-
-file(GLOB_RECURSE spdlog_include_SRCS "${HEADER_BASE}/*.h")
-add_custom_target(spdlog_headers_for_ide SOURCES ${spdlog_include_SRCS})
+    configure_file("${project_config_in}" "${project_config_out}" @ONLY)
+    write_basic_package_version_file("${version_config_file}" COMPATIBILITY SameMajorVersion)
+    install(FILES
+            "${project_config_out}"
+            "${version_config_file}" DESTINATION "${export_dest_dir}")
+
+    #---------------------------------------------------------------------------------------
+    # Support creation of installable packages
+    #---------------------------------------------------------------------------------------
+    include(cmake/spdlogCPack.cmake)
+
+endif ()

INSTALL

-spdlog is header only library.
-Just copy the files to your build tree and use a C++11 compiler
+Header only version:
+==================================================================
+Just copy the files to your build tree and use a C++11 compiler.
+Or use CMake:
+  add_executable(example_header_only example.cpp)
+  target_link_libraries(example_header_only spdlog::spdlog_header_only)
+
+
+Compiled library version:
+==================================================================
+CMake:
+  add_executable(example example.cpp)
+  target_link_libraries(example spdlog::spdlog)
+
+Or copy src/spdlog.cpp to your build tree and pass the -DSPDLOG_COMPILED_LIB to the compiler.
 
 Tested on:
 gcc 4.8.1 and above
 clang 3.5
 Visual Studio 2013
 
-gcc 4.8 flags: --std==c++11 -pthread -O3 -flto -Wl,--no-as-needed
-gcc 4.9 flags: --std=c++11 -pthread -O3 -flto
 
 
-see the makefile in the example folder
+

README.md

 # spdlog
 
-Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=master)](https://travis-ci.org/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog)
+Very fast, header-only/compiled, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=master)](https://travis-ci.org/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog)
 
 
 
 ## Install 
-#### Just copy the headers:
+#### Header only version
+Copy the source [folder](https://github.com/gabime/spdlog/tree/v1.x/include/spdlog) to your build tree and use a C++11 compiler.
+
+#### Static lib version (recommended - much faster compile times, v1.4.0)
+```console
+$ git clone https://github.com/gabime/spdlog.git
+$ cd spdlog && mkdir build && cd build
+$ cmake .. && make -j
+```
       
-* Copy the source [folder](https://github.com/gabime/spdlog/tree/v1.x/include/spdlog) to your build tree and use a C++11 compiler.
+   see example [CMakeLists.txt](https://github.com/gabime/spdlog/blob/v1.x/example/CMakeLists.txt) on how to use.
 
-#### Or use your favorite package manager:
+## Platforms
+ * Linux, FreeBSD, OpenBSD, Solaris, AIX
+ * Windows (msvc 2013+, cygwin)
+ * macOS (clang 3.5+)
+ * Android
 
-* Ubuntu: `apt-get install libspdlog-dev`
+## Package managers:
 * Homebrew: `brew install spdlog`
 * FreeBSD:  `cd /usr/ports/devel/spdlog/ && make install clean`
 * Fedora: `yum install spdlog`
@@ -19,17 +31,11 @@ Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.
 * Arch Linux: `yaourt -S spdlog-git`
 * vcpkg: `vcpkg install spdlog`
 
-
-## Platforms
- * Linux, FreeBSD, OpenBSD, Solaris, AIX
- * Windows (msvc 2013+, cygwin)
- * macOS (clang 3.5+)
- * Android
-
 ## Features
 * Very fast (see [benchmarks](#benchmarks) below).
-* Headers only, just copy and use.
+* Headers only, just copy and use. Or use as a compiled library.
 * Feature rich formatting, using the excellent [fmt](https://github.com/fmtlib/fmt) library.
+* **New!** [Backtrace](#backtrace-support) support - store debug or other messages in a ring buffer and display later on demand.
 * Fast asynchronous mode (optional)
 * [Custom](https://github.com/gabime/spdlog/wiki/3.-Custom-formatting) formatting.
 * Multi/Single threaded loggers.
@@ -41,45 +47,15 @@ Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.
     * Windows debugger (```OutputDebugString(..)```)
     * Easily extendable with custom log targets  (just implement a single function in the [sink](include/spdlog/sinks/sink.h) interface).
 * Severity based filtering - threshold levels can be modified in runtime as well as in compile time.
-* Binary data logging.
 
  
-## Benchmarks
-
-Below are some [benchmarks](https://github.com/gabime/spdlog/blob/v1.x/bench/bench.cpp) done in Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz
-
-#### Synchronous mode
-```
-*******************************************************************************
-Single thread, 1,000,000 iterations
-*******************************************************************************
-basic_st...             Elapsed: 0.181652       5,505,042/sec
-rotating_st...          Elapsed: 0.181781       5,501,117/sec
-daily_st...             Elapsed: 0.187595       5,330,630/sec
-null_st...              Elapsed: 0.0504704      19,813,602/sec
-*******************************************************************************
-10 threads sharing same logger, 1,000,000 iterations
-*******************************************************************************
-basic_mt...             Elapsed: 0.616035       1,623,284/sec
-rotating_mt...          Elapsed: 0.620344       1,612,008/sec
-daily_mt...             Elapsed: 0.648353       1,542,369/sec
-null_mt...              Elapsed: 0.151972       6,580,166/sec
-``` 
-#### Asynchronous mode
-```
-*******************************************************************************
-10 threads sharing same logger, 1,000,000 iterations 
-*******************************************************************************
-async...                Elapsed: 0.350066       2,856,606/sec
-async...                Elapsed: 0.314865       3,175,960/sec
-async...                Elapsed: 0.349851       2,858,358/sec
-```
-
 ## Usage samples
 
 #### Basic usage
 ```c++
 #include "spdlog/spdlog.h"
+#include "spdlog/sinks/basic_file_sink.h"
+
 int main() 
 {
     spdlog::info("Welcome to spdlog!");
@@ -102,6 +78,9 @@ int main()
     SPDLOG_TRACE("Some trace message with param {}", {});
     SPDLOG_DEBUG("Some debug message");
     
+    // Set the default logger to file logger
+    auto file_logger = spdlog::basic_logger_mt("basic_logger", "logs/basic.txt");
+    spdlog::set_default_logger(file_logger);            
 }
 ```
 #### create stdout/stderr logger object
@@ -157,15 +136,20 @@ void daily_example()
 ```
 
 ---
-#### Cloning loggers 
+#### Backtrace support
 ```c++
-// clone a logger and give it new name.
-// Useful for creating subsystem loggers from some "root" logger
-void clone_example()
+// Loggers can store in a ring buffer all messages (including debug/trace) and display later on demand.
+// When needed, call dump_backtrace() to see them
+spdlog::enable_backtrace(32); // create ring buffer with capacity of 32  messages
+// or my_logger->enable_backtrace(32)..
+for(int i = 0; i < 100; i++)
 {
-    auto network_logger = spdlog::get("root")->clone("network");
-    network_logger->info("Logging network stuff..");
+  spdlog::debug("Backtrace message {}", i); // not logged yet..
 }
+// e.g. if some error happened:
+spdlog::dump_backtrace(); // log them now! show the last 32 messages
+
+// or my_logger->dump_backtrace(32)..
 ```
 
 ---
@@ -178,9 +162,8 @@ spdlog::flush_every(std::chrono::seconds(3));
 ```
 
 ---
-#### Binary logging
+#### Log binary data in hex
 ```c++
-// log binary data as hex.
 // many types of std::container<char> types can be used.
 // ranges are supported too.
 // format flags:
@@ -310,10 +293,64 @@ void syslog_example()
 void android_example()
 {
     std::string tag = "spdlog-android";
-    auto android_logger = spdlog::android_logger("android", tag);
+    auto android_logger = spdlog::android_logger_mt("android", tag);
     android_logger->critical("Use \"adb shell logcat\" to view this message.");
 }
 ```
 
+## Benchmarks
+
+Below are some [benchmarks](https://github.com/gabime/spdlog/blob/v1.x/bench/bench.cpp) done in Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz
+
+#### Synchronous mode
+```
+[info] **************************************************************
+[info] Single thread, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_st         Elapsed: 0.17 secs        5,777,626/sec
+[info] rotating_st      Elapsed: 0.18 secs        5,475,894/sec
+[info] daily_st         Elapsed: 0.20 secs        5,062,659/sec
+[info] empty_logger     Elapsed: 0.07 secs       14,127,300/sec
+[info] **************************************************************
+[info] C-string (400 bytes). Single thread, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_st         Elapsed: 0.41 secs        2,412,483/sec
+[info] rotating_st      Elapsed: 0.72 secs        1,389,196/sec
+[info] daily_st         Elapsed: 0.42 secs        2,393,298/sec
+[info] null_st          Elapsed: 0.04 secs       27,446,957/sec
+[info] **************************************************************
+[info] 10 threads sharing same logger, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_mt         Elapsed: 0.60 secs        1,659,613/sec
+[info] rotating_mt      Elapsed: 0.62 secs        1,612,493/sec
+[info] daily_mt         Elapsed: 0.61 secs        1,638,305/sec
+[info] null_mt          Elapsed: 0.16 secs        6,272,758/sec
+```
+#### ASynchronous mode
+```
+[info] -------------------------------------------------
+[info] Messages     : 1,000,000
+[info] Threads      : 10
+[info] Queue        : 8,192 slots
+[info] Queue memory : 8,192 x 272 = 2,176 KB 
+[info] Total iters  : 3
+[info] -------------------------------------------------
+[info] 
+[info] *********************************
+[info] Queue Overflow Policy: block
+[info] *********************************
+[info] Elapsed: 1.70784 secs     585,535/sec
+[info] Elapsed: 1.69805 secs     588,910/sec
+[info] Elapsed: 1.7026 secs      587,337/sec
+[info] 
+[info] *********************************
+[info] Queue Overflow Policy: overrun
+[info] *********************************
+[info] Elapsed: 0.372816 secs    2,682,285/sec
+[info] Elapsed: 0.379758 secs    2,633,255/sec
+[info] Elapsed: 0.373532 secs    2,677,147/sec
+
+```
+
 ## Documentation
 Documentation can be found in the [wiki](https://github.com/gabime/spdlog/wiki/1.-QuickStart) pages.

appveyor.yml

@@ -26,7 +26,7 @@ build_script:
 
     set PATH=C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin;%PATH%
 
-    cmake .. -G %GENERATOR% -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DSPDLOG_BUILD_BENCH=OFF
+    cmake .. -G %GENERATOR% -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DSPDLOG_WCHAR_SUPPORT=ON -DSPDLOG_BUILD_EXAMPLE=ON -DSPDLOG_BUILD_EXAMPLE_HO=ON -DSPDLOG_BUILD_TESTS=ON -DSPDLOG_BUILD_TESTS_HO=OFF
 
     cmake --build . --config %BUILD_TYPE%
 

bench/CMakeLists.txt

-# *************************************************************************/
-# * Copyright (c) 2015 Ruslan Baratov.                                    */
-# *                                                                       */
-# * Permission is hereby granted, free of charge, to any person obtaining */
-# * a copy of this software and associated documentation files (the       */
-# * "Software"), to deal in the Software without restriction, including   */
-# * without limitation the rights to use, copy, modify, merge, publish,   */
-# * distribute, sublicense, and/or sell copies of the Software, and to    */
-# * permit persons to whom the Software is furnished to do so, subject to */
-# * the following conditions:                                             */
-# *                                                                       */
-# * The above copyright notice and this permission notice shall be        */
-# * included in all copies or substantial portions of the Software.       */
-# *                                                                       */
-# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-# *************************************************************************/
+# Copyright(c) 2019 spdlog authors
+# Distributed under the MIT License (http://opensource.org/licenses/MIT)
 
 cmake_minimum_required(VERSION 3.1)
-project(SpdlogBench CXX)
+project(spdlog_bench CXX)
 
 if(NOT TARGET spdlog)
   # Stand-alone build
@@ -33,16 +13,16 @@ find_package(Threads REQUIRED)
 find_package(benchmark CONFIG REQUIRED)
 
 add_executable(bench bench.cpp)
-target_link_libraries(bench PRIVATE spdlog::spdlog Threads::Threads)
+spdlog_enable_warnings(bench)
+target_link_libraries(bench PRIVATE spdlog::spdlog)
 
 add_executable(async_bench async_bench.cpp)
-target_link_libraries(async_bench PRIVATE spdlog::spdlog Threads::Threads)
+target_link_libraries(async_bench PRIVATE spdlog::spdlog)
 
 add_executable(latency latency.cpp)
-target_link_libraries(latency PRIVATE benchmark::benchmark spdlog::spdlog Threads::Threads)
-
+target_link_libraries(latency PRIVATE benchmark::benchmark spdlog::spdlog)
 
 add_executable(formatter-bench formatter-bench.cpp)
-target_link_libraries(formatter-bench PRIVATE benchmark::benchmark spdlog::spdlog Threads::Threads)
+target_link_libraries(formatter-bench PRIVATE benchmark::benchmark spdlog::spdlog)
 
 file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")

bench/Makefile

-CXX	?= g++
-CXXFLAGS	= -march=native -Wall -Wextra -pedantic -Wconversion -std=c++11 -pthread -I../include -fmax-errors=1
-CXX_RELEASE_FLAGS = -O3 -flto -Wl,--no-as-needed
-
-
-binaries=bench async_bench latency formatter-bench
-
-all: $(binaries)
-
-bench: bench.cpp
-	$(CXX) bench.cpp -o bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-
-
-async_bench: async_bench.cpp
-	$(CXX) async_bench.cpp -o async_bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-
-
-latency: latency.cpp
-	$(CXX) latency.cpp -o latency $(CXXFLAGS) $(CXX_RELEASE_FLAGS) -lbenchmark
-
-
-formatter-bench: formatter-bench.cpp
-	$(CXX) formatter-bench.cpp -o formatter-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS) -lbenchmark
-
-
-.PHONY: clean
-
-clean:
-	rm -f *.o logs/* latecy_logs $(binaries)
-
-rebuild: clean all

bench/async_bench.cpp

@@ -26,6 +26,11 @@ using namespace utils;
 
 void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
 
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4996) // disable fopen warning under msvc
+#endif                          // _MSC_VER
+
 int count_lines(const char *filename)
 {
     int counter = 0;
@@ -40,19 +45,36 @@ int count_lines(const char *filename)
 
     return counter;
 }
+
+void verify_file(const char *filename, int expected_count)
+{
+    spdlog::info("Verifying {} to contain {:n} line..", filename, expected_count);
+    auto count = count_lines(filename);
+    if (count != expected_count)
+    {
+        spdlog::error("Test failed. {} has {:n} lines instead of {:n}", filename, count, expected_count);
+        exit(1);
+    }
+    spdlog::info("Line count OK ({:n})\n", count);
+}
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
 int main(int argc, char *argv[])
 {
 
     int howmany = 1000000;
-    int queue_size = howmany + 2;
+    int queue_size = std::min(howmany + 2, 8192);
     int threads = 10;
     int iters = 3;
 
     try
     {
+        spdlog::set_pattern("[%^%l%$] %v");
         if (argc == 1)
         {
-            spdlog::set_pattern("%v");
             spdlog::info("Usage: {} <message_count> <threads> <q_size> <iterations>", argv[0]);
             return 0;
         }
@@ -62,37 +84,54 @@ int main(int argc, char *argv[])
         if (argc > 2)
             threads = atoi(argv[2]);
         if (argc > 3)
+        {
             queue_size = atoi(argv[3]);
+            if (queue_size > 500000)
+            {
+                spdlog::error("Max queue size allowed: 500,000");
+                exit(1);
+            }
+        }
 
         if (argc > 4)
             iters = atoi(argv[4]);
 
+        auto slot_size = sizeof(spdlog::details::async_msg);
         spdlog::info("-------------------------------------------------");
-        spdlog::info("Messages: {:14n}", howmany);
-        spdlog::info("Threads : {:14n}", threads);
-        spdlog::info("Queue   : {:14n}", queue_size);
-        spdlog::info("Iters   : {:>14n}", iters);
+        spdlog::info("Messages     : {:n}", howmany);
+        spdlog::info("Threads      : {:n}", threads);
+        spdlog::info("Queue        : {:n} slots", queue_size);
+        spdlog::info("Queue memory : {:n} x {} = {:n} KB ", queue_size, slot_size, (queue_size * slot_size) / 1024);
+        spdlog::info("Total iters  : {:n}", iters);
         spdlog::info("-------------------------------------------------");
 
         const char *filename = "logs/basic_async.log";
-
+        spdlog::info("");
+        spdlog::info("*********************************");
+        spdlog::info("Queue Overflow Policy: block");
+        spdlog::info("*********************************");
         for (int i = 0; i < iters; i++)
         {
             auto tp = std::make_shared<details::thread_pool>(queue_size, 1);
             auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(filename, true);
             auto logger = std::make_shared<async_logger>("async_logger", std::move(file_sink), std::move(tp), async_overflow_policy::block);
             bench_mt(howmany, std::move(logger), threads);
-            auto count = count_lines(filename);
-
-            if (count != howmany)
-            {
-                spdlog::error("Test failed. {} has {:n} lines instead of {:n}", filename, count, howmany);
-                exit(1);
+            // verify_file(filename, howmany);
         }
-            else
+
+        spdlog::info("");
+        spdlog::info("*********************************");
+        spdlog::info("Queue Overflow Policy: overrun");
+        spdlog::info("*********************************");
+        // do same test but discard oldest if queue is full instead of blocking
+        filename = "logs/basic_async-overrun.log";
+        for (int i = 0; i < iters; i++)
         {
-                spdlog::info("Line count OK ({:n})\n", count);
-            }
+            auto tp = std::make_shared<details::thread_pool>(queue_size, 1);
+            auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(filename, true);
+            auto logger =
+                std::make_shared<async_logger>("async_logger", std::move(file_sink), std::move(tp), async_overflow_policy::overrun_oldest);
+            bench_mt(howmany, std::move(logger), threads);
         }
         spdlog::shutdown();
     }
@@ -102,7 +141,6 @@ int main(int argc, char *argv[])
         perror("Last error");
         return 1;
     }
-
     return 0;
 }
 

bench/bench.cpp

@@ -7,7 +7,6 @@
 // bench.cpp : spdlog benchmarks
 //
 #include "spdlog/spdlog.h"
-#include "spdlog/async.h"
 #include "spdlog/sinks/basic_file_sink.h"
 #include "spdlog/sinks/daily_file_sink.h"
 #include "spdlog/sinks/null_sink.h"
@@ -31,81 +30,99 @@ void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count
 void bench_default_api(int howmany, std::shared_ptr<spdlog::logger> log);
 void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log);
 
-int main(int argc, char *argv[])
-{
-
-    spdlog::default_logger()->set_pattern("[%^%l%$] %v");
-    int howmany = 1000000;
-    int queue_size = howmany + 2;
-    int threads = 10;
-    size_t file_size = 30 * 1024 * 1024;
-    size_t rotating_files = 5;
+static size_t file_size = 30 * 1024 * 1024;
+static size_t rotating_files = 5;
 
-    try
+void bench_threaded_logging(int threads, int iters)
 {
-
-        if (argc > 1)
-            howmany = atoi(argv[1]);
-        if (argc > 2)
-            threads = atoi(argv[2]);
-        if (argc > 3)
-            queue_size = atoi(argv[3]);
-
     spdlog::info("**************************************************************");
-        spdlog::info("Single thread, {:n} iterations", howmany);
+    spdlog::info("Multi threaded: {:n} threads, {:n} messages", threads, iters);
     spdlog::info("**************************************************************");
 
-        auto basic_st = spdlog::basic_logger_st("basic_st", "logs/basic_st.log", true);
-        bench(howmany, std::move(basic_st));
-
-        basic_st.reset();
-        auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st.log", file_size, rotating_files);
-        bench(howmany, std::move(rotating_st));
+    auto basic_mt = spdlog::basic_logger_mt("basic_mt", "logs/basic_mt.log", true);
+    bench_mt(iters, std::move(basic_mt), threads);
+    auto basic_mt_tracing = spdlog::basic_logger_mt("basic_mt/backtrace-on", "logs/basic_mt.log", true);
+    basic_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(basic_mt_tracing), threads);
 
-        auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st.log");
-        bench(howmany, std::move(daily_st));
+    spdlog::info("");
+    auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt.log", file_size, rotating_files);
+    bench_mt(iters, std::move(rotating_mt), threads);
+    auto rotating_mt_tracing = spdlog::rotating_logger_mt("rotating_mt/backtrace-on", "logs/rotating_mt.log", file_size, rotating_files);
+    rotating_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(rotating_mt_tracing), threads);
 
-        bench(howmany, spdlog::create<null_sink_st>("null_st"));
+    spdlog::info("");
+    auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt.log");
+    bench_mt(iters, std::move(daily_mt), threads);
+    auto daily_mt_tracing = spdlog::daily_logger_mt("daily_mt/backtrace-on", "logs/daily_mt.log");
+    daily_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(daily_mt_tracing), threads);
+
+    spdlog::info("");
+    auto empty_logger = std::make_shared<spdlog::logger>("level-off");
+    empty_logger->set_level(spdlog::level::off);
+    bench(iters, empty_logger);
+    auto empty_logger_tracing = std::make_shared<spdlog::logger>("level-off/backtrace-on");
+    empty_logger_tracing->set_level(spdlog::level::off);
+    empty_logger_tracing->enable_backtrace(32);
+    bench(iters, empty_logger_tracing);
+}
 
+void bench_single_threaded(int iters)
+{
     spdlog::info("**************************************************************");
-        spdlog::info("C-string (400 bytes). Single thread, {:n} iterations", howmany);
+    spdlog::info("Single threaded: {:n} messages", iters);
     spdlog::info("**************************************************************");
 
-        basic_st = spdlog::basic_logger_st("basic_st", "logs/basic_cs.log", true);
-        bench_c_string(howmany, std::move(basic_st));
-
-        rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_cs.log", file_size, rotating_files);
-        bench_c_string(howmany, std::move(rotating_st));
-
-        daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_cs.log");
-        bench_c_string(howmany, std::move(daily_st));
-
-        bench_c_string(howmany, spdlog::create<null_sink_st>("null_st"));
+    auto basic_st = spdlog::basic_logger_st("basic_st", "logs/basic_st.log", true);
+    bench(iters, std::move(basic_st));
 
-        spdlog::info("**************************************************************");
-        spdlog::info("{:n} threads sharing same logger, {:n} iterations", threads, howmany);
-        spdlog::info("**************************************************************");
+    auto basic_st_tracing = spdlog::basic_logger_st("basic_st/backtrace-on", "logs/basic_st.log", true);
+    bench(iters, std::move(basic_st_tracing));
 
-        auto basic_mt = spdlog::basic_logger_mt("basic_mt", "logs/basic_mt.log", true);
-        bench_mt(howmany, std::move(basic_mt), threads);
+    spdlog::info("");
+    auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st.log", file_size, rotating_files);
+    bench(iters, std::move(rotating_st));
+    auto rotating_st_tracing = spdlog::rotating_logger_st("rotating_st/backtrace-on", "logs/rotating_st.log", file_size, rotating_files);
+    rotating_st_tracing->enable_backtrace(32);
+    bench(iters, std::move(rotating_st_tracing));
 
-        auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt.log", file_size, rotating_files);
-        bench_mt(howmany, std::move(rotating_mt), threads);
+    spdlog::info("");
+    auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st.log");
+    bench(iters, std::move(daily_st));
+    auto daily_st_tracing = spdlog::daily_logger_st("daily_st/backtrace-on", "logs/daily_st.log");
+    daily_st_tracing->enable_backtrace(32);
+    bench(iters, std::move(daily_st_tracing));
+
+    spdlog::info("");
+    auto empty_logger = std::make_shared<spdlog::logger>("level-off");
+    empty_logger->set_level(spdlog::level::off);
+    bench(iters, empty_logger);
+
+    auto empty_logger_tracing = std::make_shared<spdlog::logger>("level-off/backtrace-on");
+    empty_logger_tracing->set_level(spdlog::level::off);
+    empty_logger_tracing->enable_backtrace(32);
+    bench(iters, empty_logger_tracing);
+}
 
-        auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt.log");
-        bench_mt(howmany, std::move(daily_mt), threads);
-        bench_mt(howmany, spdlog::create<null_sink_mt>("null_mt"), threads);
+int main(int argc, char *argv[])
+{
+    spdlog::set_automatic_registration(false);
+    spdlog::default_logger()->set_pattern("[%^%l%$] %v");
+    int iters = 250000;
+    int threads = 4;
+    try
+    {
 
-        spdlog::info("**************************************************************");
-        spdlog::info("Asyncronous.. {:n} threads sharing same logger, {:n} iterations", threads, howmany);
-        spdlog::info("**************************************************************");
+        if (argc > 1)
+            iters = atoi(argv[1]);
+        if (argc > 2)
+            threads = atoi(argv[2]);
 
-        for (int i = 0; i < 3; ++i)
-        {
-            spdlog::init_thread_pool(static_cast<size_t>(queue_size), 1);
-            auto as = spdlog::basic_logger_mt<spdlog::async_factory>("async", "logs/basic_async.log", true);
-            bench_mt(howmany, std::move(as), threads);
-        }
+        bench_single_threaded(iters);
+        bench_threaded_logging(1, iters);
+        bench_threaded_logging(threads, iters);
     }
     catch (std::exception &ex)
     {
@@ -127,7 +144,7 @@ void bench(int howmany, std::shared_ptr<spdlog::logger> log)
     auto delta = high_resolution_clock::now() - start;
     auto delta_d = duration_cast<duration<double>>(delta).count();
 
-    spdlog::info("{:<16} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
     spdlog::drop(log->name());
 }
 
@@ -153,7 +170,7 @@ void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count
 
     auto delta = high_resolution_clock::now() - start;
     auto delta_d = duration_cast<duration<double>>(delta).count();
-    spdlog::info("{:<16} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
     spdlog::drop(log->name());
 }
 
@@ -172,7 +189,7 @@ void bench_default_api(int howmany, std::shared_ptr<spdlog::logger> log)
     auto delta_d = duration_cast<duration<double>>(delta).count();
     spdlog::drop(log->name());
     spdlog::set_default_logger(std::move(orig_default));
-    spdlog::info("{:<16} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
 }
 
 void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log)
@@ -195,5 +212,5 @@ void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log)
     auto delta_d = duration_cast<duration<double>>(delta).count();
     spdlog::drop(log->name());
     spdlog::set_default_logger(std::move(orig_default));
-    spdlog::info("{:<16} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
 }

bench/formatter-bench.cpp

@@ -8,27 +8,15 @@
 #include "spdlog/spdlog.h"
 #include "spdlog/details/pattern_formatter.h"
 
-void bench_scoped_pad(benchmark::State &state, size_t wrapped_size, spdlog::details::padding_info padinfo)
-{
-    fmt::memory_buffer dest;
-    for (auto _ : state)
-    {
-        {
-            spdlog::details::scoped_pad p(wrapped_size, padinfo, dest);
-            benchmark::DoNotOptimize(p);
-            dest.clear();
-        }
-    }
-}
-
 void bench_formatter(benchmark::State &state, std::string pattern)
 {
     auto formatter = spdlog::details::make_unique<spdlog::pattern_formatter>(pattern);
-    fmt::memory_buffer dest;
+    spdlog::memory_buf_t dest;
     std::string logger_name = "logger-name";
     const char *text = "Hello. This is some message with length of 80                                   ";
 
-    spdlog::details::log_msg msg(&logger_name, spdlog::level::info, text);
+    spdlog::source_loc source_loc{"a/b/c/d/myfile.cpp", 123, "some_func()"};
+    spdlog::details::log_msg msg(source_loc, logger_name, spdlog::level::info, text);
 
     for (auto _ : state)
     {
@@ -41,7 +29,7 @@ void bench_formatter(benchmark::State &state, std::string pattern)
 void bench_formatters()
 {
     // basic patterns(single flag)
-    std::string all_flags = "+vtPnlLaAbBcCYDmdHIMSefFprRTXzEi%";
+    std::string all_flags = "+vtPnlLaAbBcCYDmdHIMSefFprRTXzEisg@luioO%";
     std::vector<std::string> basic_patterns;
     for (auto &flag : all_flags)
     {

bench/latency.cpp

@@ -90,29 +90,50 @@ int main(int argc, char *argv[])
     disabled_logger->set_level(spdlog::level::off);
     benchmark::RegisterBenchmark("disabled-at-compile-time", bench_disabled_macro, disabled_logger);
     benchmark::RegisterBenchmark("disabled-at-runtime", bench_logger, disabled_logger);
+    // with backtrace of 64
+    auto tracing_disabled_logger = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+    tracing_disabled_logger->enable_backtrace(64);
+    benchmark::RegisterBenchmark("disabled-at-runtime/backtrace", bench_logger, tracing_disabled_logger);
 
     auto null_logger_st = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_st>());
     benchmark::RegisterBenchmark("null_sink_st (500_bytes c_str)", bench_c_string, std::move(null_logger_st));
     benchmark::RegisterBenchmark("null_sink_st", bench_logger, null_logger_st);
+    // with backtrace of 64
+    auto tracing_null_logger_st = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_st>());
+    tracing_null_logger_st->enable_backtrace(64);
+    benchmark::RegisterBenchmark("null_sink_st/backtrace", bench_logger, tracing_null_logger_st);
 
     // basic_st
     auto basic_st = spdlog::basic_logger_st("basic_st", "latency_logs/basic_st.log", true);
     benchmark::RegisterBenchmark("basic_st", bench_logger, std::move(basic_st))->UseRealTime();
     spdlog::drop("basic_st");
+    // with backtrace of 64
+    auto tracing_basic_st = spdlog::basic_logger_st("tracing_basic_st", "latency_logs/tracing_basic_st.log", true);
+    tracing_basic_st->enable_backtrace(64);
+    benchmark::RegisterBenchmark("basic_st/backtrace", bench_logger, std::move(tracing_basic_st))->UseRealTime();
+    spdlog::drop("tracing_basic_st");
 
     // rotating st
     auto rotating_st = spdlog::rotating_logger_st("rotating_st", "latency_logs/rotating_st.log", file_size, rotating_files);
     benchmark::RegisterBenchmark("rotating_st", bench_logger, std::move(rotating_st))->UseRealTime();
     spdlog::drop("rotating_st");
+    // with backtrace of 64
+    auto tracing_rotating_st =
+        spdlog::rotating_logger_st("tracing_rotating_st", "latency_logs/tracing_rotating_st.log", file_size, rotating_files);
+    benchmark::RegisterBenchmark("rotating_st/backtrace", bench_logger, std::move(tracing_rotating_st))->UseRealTime();
+    spdlog::drop("tracing_rotating_st");
 
     // daily st
     auto daily_st = spdlog::daily_logger_mt("daily_st", "latency_logs/daily_st.log");
     benchmark::RegisterBenchmark("daily_st", bench_logger, std::move(daily_st))->UseRealTime();
     spdlog::drop("daily_st");
+    auto tracing_daily_st = spdlog::daily_logger_mt("tracing_daily_st", "latency_logs/daily_st.log");
+    benchmark::RegisterBenchmark("daily_st/backtrace", bench_logger, std::move(tracing_daily_st))->UseRealTime();
+    spdlog::drop("tracing_daily_st");
 
-    //    //
-    //    // Multi threaded bench, 10 loggers using same logger concurrently
-    //    //
+    //
+    // Multi threaded bench, 10 loggers using same logger concurrently
+    //
     auto null_logger_mt = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
     benchmark::RegisterBenchmark("null_sink_mt", bench_logger, null_logger_mt)->Threads(n_threads)->UseRealTime();
 
@@ -138,6 +159,11 @@ int main(int argc, char *argv[])
         "async_logger", std::make_shared<null_sink_mt>(), std::move(tp), spdlog::async_overflow_policy::overrun_oldest);
     benchmark::RegisterBenchmark("async_logger", bench_logger, async_logger)->Threads(n_threads)->UseRealTime();
 
+    auto async_logger_tracing = std::make_shared<spdlog::async_logger>(
+        "async_logger_tracing", std::make_shared<null_sink_mt>(), std::move(tp), spdlog::async_overflow_policy::overrun_oldest);
+    async_logger_tracing->enable_backtrace(32);
+    benchmark::RegisterBenchmark("async_logger/tracing", bench_logger, async_logger_tracing)->Threads(n_threads)->UseRealTime();
+
     benchmark::Initialize(&argc, argv);
     benchmark::RunSpecifiedBenchmarks();
 }

bench/logs/.gitignore

-# Ignore everything in this directory
-*
-# Except this file
-!.gitignore

bench/mem

-#!/bin/sh
-
-if [ $# -lt 1 ]; then
-  echo "usage: $0 <program>"
-fi
-
-PROG=$1
-
-if [ ! -x "$PROG" ]; then
-  echo $PROG not found or not executable.
-  exit 1
-fi
-
-$* &
-PID=$!
-
-while `kill -0 $PID 2>/dev/null`; do
-  ps -eo size,pid,user,pcpu,command --sort -size | awk '{ line=1 ; hr=$1/1024 ; printf("%13.2f Mb ",hr); } { for ( x=4 ; x<=NF ; x++ ) { printf("%s ",$x) } print "" }' | grep -v grep | grep -v $0 | grep $PROG
-done

bench/meson.build

+benchmark = dependency('benchmark')
+
+bench_matrix = [
+  ['bench',           [spdlog_dep],            []],
+  ['async_bench',     [spdlog_dep],            []],
+  ['formatter-bench', [spdlog_dep, benchmark], ['all']],
+  ['latency',         [spdlog_dep, benchmark], []],
+]
+
+foreach i : bench_matrix
+  bench_exe = executable(i[0], i[0] + '.cpp', dependencies: i[1])
+  benchmark('bench_' + i[0], bench_exe, args: i[2])
+endforeach
+
+run_command(find_program('mkdir'), meson.current_build_dir() + '/logs')

clang_tidy.sh

-#!/bin/bash
-clang-tidy example/example.cpp -- -I ./include 

cmake/Config.cmake.in

-# *************************************************************************/
-# * Copyright (c) 2015 Ruslan Baratov.                                    */
-# *                                                                       */
-# * Permission is hereby granted, free of charge, to any person obtaining */
-# * a copy of this software and associated documentation files (the       */
-# * "Software"), to deal in the Software without restriction, including   */
-# * without limitation the rights to use, copy, modify, merge, publish,   */
-# * distribute, sublicense, and/or sell copies of the Software, and to    */
-# * permit persons to whom the Software is furnished to do so, subject to */
-# * the following conditions:                                             */
-# *                                                                       */
-# * The above copyright notice and this permission notice shall be        */
-# * included in all copies or substantial portions of the Software.       */
-# *                                                                       */
-# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-# *************************************************************************/
-
-set(SPDLOG_FMT_EXTERNAL @SPDLOG_FMT_EXTERNAL@)
-
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
-
-if(SPDLOG_FMT_EXTERNAL)
-    include(CMakeFindDependencyMacro)
-    find_dependency(fmt CONFIG)
-endif()

cmake/ide.cmake

+#---------------------------------------------------------------------------------------
+# IDE support for headers
+#---------------------------------------------------------------------------------------
+set(SPDLOG_HEADERS_DIR "${CMAKE_CURRENT_LIST_DIR}/../include")
+
+file(GLOB SPDLOG_TOP_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/*.h")
+file(GLOB SPDLOG_DETAILS_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/details/*.h")
+file(GLOB SPDLOG_SINKS_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/sinks/*.h")
+file(GLOB SPDLOG_FMT_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/fmt/*.h")
+file(GLOB SPDLOG_FMT_BUNDELED_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/fmt/bundled/*.h")
+set(SPDLOG_ALL_HEADERS ${SPDLOG_TOP_HEADERS} ${SPDLOG_DETAILS_HEADERS} ${SPDLOG_SINKS_HEADERS} ${SPDLOG_FMT_HEADERS} ${SPDLOG_FMT_BUNDELED_HEADERS})
+
+source_group("Header Files\\spdlog" FILES ${SPDLOG_TOP_HEADERS})
+source_group("Header Files\\spdlog\\details" FILES ${SPDLOG_DETAILS_HEADERS})
+source_group("Header Files\\spdlog\\sinks" FILES ${SPDLOG_SINKS_HEADERS})
+source_group("Header Files\\spdlog\\fmt" FILES ${SPDLOG_FMT_HEADERS})
+source_group("Header Files\\spdlog\\fmt\\bundled\\" FILES ${SPDLOG_FMT_BUNDELED_HEADERS})
+

cmake/sanitizers.cmake

-if(SPDLOG_SANITIZE_THREAD AND SPDLOG_SANITIZE_ADDRESS)
-    message(FATAL_ERROR "AddressSanitizer is not compatible with ThreadSanitizer.")
-endif()
-
-if(SPDLOG_SANITIZE_ADDRESS)
-    message(STATUS "AddressSanitizer enabled")
-    set(SANITIZER_FLAGS "-fsanitize=address,undefined")
-    add_compile_options("-fno-sanitize=signed-integer-overflow")
-endif()
-
-if(SPDLOG_SANITIZE_THREAD)
-    message(STATUS "ThreadSanitizer enabled")
-    set(SANITIZER_FLAGS "-fsanitize=thread")
-endif()
-
-if(SPDLOG_SANITIZE_THREAD OR SPDLOG_SANITIZE_ADDRESS)
-    add_compile_options(${SANITIZER_FLAGS})
-    add_compile_options("-fno-sanitize-recover=all")
-    add_compile_options("-fno-omit-frame-pointer")
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${SANITIZER_FLAGS} -fuse-ld=gold")
-endif()