Release Notes¶

ng-log¶

0.8.3 July 10, 2026¶

• Mapped the CMake option value none to a proper CMake boolean string
• Fixed reading uninitialized output when a demangled name is truncated

0.8.2 August 16, 2025¶

• Propagated the configured language standard to the unit tests

0.8.1 June 15, 2025¶

• Fixed LogCleaner deleting only INFO level logs when enabled for all severities
• Fixed a regression in thread-local storage support
• Deprecated the glog CMake import target in favor of ng-log
• Added support for compiling without RTTI

0.8.0 May 1, 2025¶

First public release under the new name.

Pre-migration history¶

The releases below predate the rename and are kept here for historical reference.

0.7.1 June 8, 2024¶

• Fixed Android detection
• Fixed formatting of unknown stack frames

0.7.0 February 17, 2024¶

Major overhaul to take advantage of C++14 language and library features, including using chrono types in the public API.

Changes:

• Added C++14 as the primary language standard
• Added Emscripten support
• Changed LogSeverity to an unscoped enum, which can surface previously silent implicit conversions between int and LogSeverity
• Changed CMake to no longer generate pkg-config files by default (opt in via WITH_PKGCONFIG)
• Deprecated LogMessage::getMessageTime in favor of LogMessage::time
• Deprecated LogMessageTime::timestamp in favor of LogMessageTime::when
• Deprecated LogMessageTime::gmtoff in favor of LogMessageTime::gmtoffset
• Deprecated EnableLogCleaner(unsigned) in favor of EnableLogCleaner(std::chrono::minutes)
• Deprecated the LogSink::send overload accepting std::tm in favor of one accepting LogMessageTime

• Deprecated LogMessageInfo and its prefix callback in favor of LogMessage and InstallPrefixFormatter

  All deprecated methods were removed in 0.8.0.

0.6.0 April 5, 2022¶

• Added time-based periodic logging (LOG_EVERY_T)
• Added LogMessageTime::gmtoff() to obtain the GMT offset
• Added support for stack unwinding on Android
• Added FLAGS_log_year_in_prefix to control whether the year is included in the log prefix
• Added logtostdout and colorlogtostdout flags to support logging to stdout
• Exposed IsGoogleLoggingInitialized() in the public API
• Changed LogCleaner to support relative paths
• Changed --max_log_size to use uint32 and prevented it from overflowing
• Renamed the GOOGLE_GLOG_DLL_DECL export macro to GLOG_EXPORT
• Enabled the custom prefix option by default
• Deprecated the LogSink::send overload accepting std::tm in favor of one accepting LogMessageTime, while keeping a backward-compatible overload
• Raised the minimum required CMake version to 3.16 and gflags to 2.2.2
• Fixed CMake configuration on Cygwin and various compiler warnings across toolchains

0.5.0 May 8, 2021¶

• Added support for customizing the log line prefix (InstallPrefixFormatter)
• Added automatic removal of old log files (EnableLogCleaner)
• Added a FLAGS_log_utc_time option to write timestamps in UTC
• Added the year to the default log line prefix
• Added support for outputting log messages to Android's logcat
• Added pkg-config support and vcpkg installation instructions
• Added support for using libunwind as an imported CMake target
• Changed the build to require a C++11 compiler; a C compiler and Windows-specific or legacy C headers are no longer needed
• Changed CMake to build shared libraries by default
• Removed the autoconf-based build in favor of CMake only
• Fixed race conditions in LOG_EVERY_N and related macros
• Fixed handling of --max_log_size overflow
• Fixed various Windows linker warnings

0.4.0 January 22, 2019¶

• Added support for building with Bazel
• Added Cygwin support
• Added stack tracing support on Windows
• Renamed the CMake project from google-glog to glog
• Reduced heap allocations on the logging fast path
• Fixed username lookup when the USER environment variable is missing
• Fixed mingw cross compilation and redefinition warnings from config.h
• Fixed a number of missing symbol exports on Windows
• Added support for colored output on the konsole terminal family

0.3.5 May 9, 2017¶

• Added CMake build support
• Added DCHECK_ALWAYS_ON to keep D* macros enabled under NDEBUG
• Added logfile_mode to control the permissions of created log files
• Added support for PowerPC and color output for tmux terminals
• Changed CHECK_NOTNULL to work with smart pointers when compiled as C++11
• Changed Symbolize to calculate a module's base address from its program headers
• Fixed an AddLogSink memory leak
• Fixed a double-free in a Windows unit test
• Fixed a dangling sink pointer after removal
• Fixed memory allocation from the signal handler
• Various MinGW and Windows build fixes

0.3.4 March 9, 2015¶

• Moved the repository to GitHub
• Added libc++ support
• Added a callback for OpenObjectFileContainingPcAndGetStartAddress
• Added StrError and replaced the posix_strerror_r call
• Added support for unordered_map/unordered_set in STL logging
• Reduced dynamic allocation from three to one allocation per log message
• Fixed a build issue in demangle.cc
• Fixed missing GOOGLE_GLOG_DLL_DECL for the latest Visual Studio

0.3.3 February 1, 2013¶

• Added a --disable-rtti configure option
• Added color output support via GLOG_colorlogtostderr
• Allowed re-initializing the library after ShutdownGoogleLogging
• Changed the ABI around flags to be compatible with gflags
• Fixed LOG_SYSRESULT
• Fixed Visual Studio, QNX, and FreeBSD builds

0.3.2 January 12, 2012¶

• Added Clang support
• Improved the demangler and stack trace support for newer GCC versions
• Fixed fork(2) corrupting log files
• Fixed ERROR being defined by windows.h

0.3.1 June 15, 2010¶

• Added DCHECK_NOTNULL
• Added ShutdownGoogleLogging to close syslog
• Added support for building and testing out of tree
• Fixed GLOG_* environment variables being ignored when gflags is installed
• Fixed the --enable-frame-pointers option and libunwind detection

0.3.0 July 30, 2009¶

• Added NetBSD and OpenBSD support
• Fixed a deadlock triggered when using a recent version of gflags
• Fixed hostname and username detection on Windows

0.2.1 April 10, 2009¶

• Added pkg-config support
• Added a --with-gflags configure option
• Fixed timestamps produced by the VC++ build
• Fixed building with gtest

0.2 January 23, 2009¶

• Added initial Windows VC++ support
• Added the LOG_TO_STRING, LOG_AT_LEVEL, DVLOG, and LOG_TO_SINK_ONLY macros
• Added the --log_backtrace_at option
• Added microsecond precision to logged timestamps
• Added automatic linking of the pthread library

0.1.2 November 18, 2008¶

• Added InstallFailureSignalHandler()
• Changed how stack traces are produced
• Removed the unnecessary DISALLOW_EVIL_CONSTRUCTORS macro

0.1.1 October 15, 2008¶

• Added symbolization support on macOS 10.5
• Fixed --vmodule not working together with gflags
• Fixed symbolize_unittest with GCC 4.3

0.1 October 7, 2008¶

Initial release: a library implementing application-level logging, with logging APIs based on C++-style streams and various helper macros.