In this release, glog underwent a major overhaul to take advantage of C++14 language and library features. Among the many changes, the public API has also been extended to use the more up-to-date standard library types (notably chrono).

Please take the opportunity to test this release candidate and report any issues. The final release of glog 0.7.0 is expected in early February 2024.

Highlights

• C++14 is now the primary language standard
• Emscripten support
• Many fixes and enhancements

Compatibility

glog aims to maintain source compatibility with the previous release. We did our best to ensure such compatibility in this version as well. However, downstream clients must recompile against the new glog version due to ABI incompatible changes.

Deprecations

A number of functions, methods, and types have been deprecated in favor of more uniform interface.

[!WARNING] Deprecated methods will be removed in glog 0.8.0. Please make sure to update your code.

• google::LogMessage::getMessageTime has been superseded by google::LogMessage::time.
• google::LogMessageTime::timestamp has been superseded by google::LogMessageTime::when.
• google::LogMessageTime::gmtoff has been superseded by google::LogMessageTime::gmtoffset.
• google::EnableLogCleaner(unsigned) has been superseded by google::EnableLogCleaner(std::chrono::minutes).
• google::LogSink::send accepting std::tm (deprecated since glog 0.6.0) has been superseded by google::LogSink::send to accept google::LogMessageTime instead.
• google::LogMessageInfo and the custom prefix callback accepting this type have been superseded by google::LogMessage. To customize the log line prefix use the google::InstallPrefixFormatter function instead of the google::InitGoogleLogging overload.

Further changes

• google::LogSeverity has been converted to an unscoped enum. This can result in compilation issues if implicit conversion between an int and google::LogSeverity was erroneously assumed.
• By default, CMake no longer generates the undocumented and untested pkg-config files. The support is now opt in which requires the CMake option WITH_PKGCONFIG to be explicitly set to ON.

What's Changed

• bazel: Use glog 0.6.0 in README. by @xiaoxq in https://github.com/google/glog/pull/831
• Strip only the first leading @ in repo name by @meteorcloudy in https://github.com/google/glog/pull/832
• fix: Fix warning about redefining STDC_HEADERS by @joeyparrish in https://github.com/google/glog/pull/835
• support ndk r25 by @sergiud in https://github.com/google/glog/pull/844
• added emscripten support by @sergiud in https://github.com/google/glog/pull/846
• simplify DLOG macro definition in NDEBUG mode by @lstaroth in https://github.com/google/glog/pull/830
• windows: call to FormatMessage() should _IGNORE_INSERTS by @anpol in https://github.com/google/glog/pull/849
• log_file_header: add option to disable log file headers. by @anpol in https://github.com/google/glog/pull/850
• SetLogger should delete previously set custom logger. by @anpol in https://github.com/google/glog/pull/853
• logsink: fix multiple issues with LogSink::ToString() by @anpol in https://github.com/google/glog/pull/852
• Fix broken stacktrace by @marekcirkos in https://github.com/google/glog/pull/851
• Revert "simplify DLOG macro definition in NDEBUG mode" by @sergiud in https://github.com/google/glog/pull/855
• Remove symbolize Bazel test by @drigz in https://github.com/google/glog/pull/860
• Disable cc toolchain resolution when using Clang on Windows by @comius in https://github.com/google/glog/pull/863
• Fix Windows clang CI for CC toolchain resolution by @jsharpe in https://github.com/google/glog/pull/877
• ci: run linux workflow on ubuntu 22.04 by @sergiud in https://github.com/google/glog/pull/885
• ci: update actions by @sergiud in https://github.com/google/glog/pull/886
• fixed emscripten detection by @sergiud in https://github.com/google/glog/pull/897
• drop lgtm badges by @sergiud in https://github.com/google/glog/pull/899
• avoid anonymous struct typedefs by @sergiud in https://github.com/google/glog/pull/900
• cmake: rename glogbase to glog_internal by @sergiud in https://github.com/google/glog/pull/901
• drop custom prefix option by @sergiud in https://github.com/google/glog/pull/898
• Adds fuzz testing for demangle by @catenacyber in https://github.com/google/glog/pull/878
• [docs] Add Conan usage on README by @uilianries in https://github.com/google/glog/pull/862
• ci: includ CIFuzz GitHub workflow by @catenacyber in https://github.com/google/glog/pull/903
• Fix empty stack trace when use bazel on aarch64 by @noaxp in https://github.com/google/glog/pull/905
• move to C++14 by @sergiud in https://github.com/google/glog/pull/902
• Fixes for OpenBSD by @brad0 in https://github.com/google/glog/pull/921
• Fix targets for layering_check by @mai93 in https://github.com/google/glog/pull/916
• Fix spelling mistakes by @Vertexwahn in https://github.com/google/glog/pull/919
• logging: Prevent LogStream constructor from being discarded by @ekilmer in https://github.com/google/glog/pull/925
• Warn about dragons in the Bazel include path by @drigz in https://github.com/google/glog/pull/927
• chore(docs): fix typo in conan install step in readme by @pravinba9495 in https://github.com/google/glog/pull/946
• SendEmail: Protect users against vulnerable logmailers by @philwo in https://github.com/google/glog/pull/939
• fix(demangle): prevent signed integer overflow by @sergiud in https://github.com/google/glog/pull/955
• fix: address sanitizer failures by @sergiud in https://github.com/google/glog/pull/956
• fix: stack buffer overflow by @sergiud in https://github.com/google/glog/pull/957
• fix(demangle): limit recursion depth by @sergiud in https://github.com/google/glog/pull/958
• fix(demangle): limit ParseTemplateArg recursion depth by @sergiud in https://github.com/google/glog/pull/963
• fix: enable building without threads by @sergiud in https://github.com/google/glog/pull/964
• ci: replace lcov by gcovr by @sergiud in https://github.com/google/glog/pull/965
• Add tsan annotation to static variable when checking if vlog is on. by @pateldeev in https://github.com/google/glog/pull/890
• ci: drop code scanning category by @sergiud in https://github.com/google/glog/pull/968
• fix: remove stray spaces by @sergiud in https://github.com/google/glog/pull/967
• fix: prefer includes in same directory by @sergiud in https://github.com/google/glog/pull/969
• Support truncate log file for windows by @bqhuyy in https://github.com/google/glog/pull/960
• build(deps): bump actions/checkout from 3 to 4 by @dependabot in https://github.com/google/glog/pull/970
• fix(cmake): rework ucontext_t introspection by @sergiud in https://github.com/google/glog/pull/954
• LogCleaner: Fix the scenario when FLAGS_log_dir has no '/' suffix by @lingbin in https://github.com/google/glog/pull/972
• fix(build): raise minimum cmake version to 3.21 by @sergiud in https://github.com/google/glog/pull/974
• fix: remove redundant POSIX function aliases by @sergiud in https://github.com/google/glog/pull/990
• build(deps): bump github/codeql-action from 2 to 3 by @dependabot in https://github.com/google/glog/pull/988
• build(deps): bump actions/upload-artifact from 3 to 4 by @dependabot in https://github.com/google/glog/pull/987
• cmake: replace check_library_exists by check_cxx_symbol_exists by @sergiud in https://github.com/google/glog/pull/991
• fix: log last error code instead of a BOOL by @sergiud in https://github.com/google/glog/pull/994
• fix: replace NULL by nullptr by @sergiud in https://github.com/google/glog/pull/993
• fix: drop custom (v)snprintf definition by @sergiud in https://github.com/google/glog/pull/992
• symbolize_unittest: make it a bit more portable by @vapier in https://github.com/google/glog/pull/985
• Added missing debug-logging macros by @4c3y in https://github.com/google/glog/pull/986
• fix: shell quote user-provided mailer path by @sergiud in https://github.com/google/glog/pull/999
• cmake: use threads import target by @sergiud in https://github.com/google/glog/pull/1000
• cmake: do not enable TLS without threads by @sergiud in https://github.com/google/glog/pull/1001
• cmake: remove obsolete check by @sergiud in https://github.com/google/glog/pull/1002
• cmake: simplify symbol availability checks by @sergiud in https://github.com/google/glog/pull/1003
• cmake: use glog specific project variables by @sergiud in https://github.com/google/glog/pull/1004
• cmake: remove pre C++11 warning options by @sergiud in https://github.com/google/glog/pull/1005
• fix: enable strip log tests by @sergiud in https://github.com/google/glog/pull/1009
• rework public header structure by @sergiud in https://github.com/google/glog/pull/1012
• fix: add missing gmtime_r check by @sergiud in https://github.com/google/glog/pull/1013
• fix: remove unused test code by @sergiud in https://github.com/google/glog/pull/1014
• feat: use standard mutexes by @sergiud in https://github.com/google/glog/pull/1015
• feat: reduce manual deallocations by @sergiud in https://github.com/google/glog/pull/1016
• fix(tests): prevent clang from optimizing new away by @sergiud in https://github.com/google/glog/pull/1017
• fix(demangle): support decltype(nullptr) and pack expansion by @sergiud in https://github.com/google/glog/pull/1018
• feat: use standard threads by @sergiud in https://github.com/google/glog/pull/1019
• cmake: remove unused check by @sergiud in https://github.com/google/glog/pull/1021
• feat: use chrono by @sergiud in https://github.com/google/glog/pull/1020
• fix(demangle): place symbols in anonymous namespace by @sergiud in https://github.com/google/glog/pull/1022
• feat(demangle): use cxx abi demangler by @sergiud in https://github.com/google/glog/pull/1023
• fix: make log severity type safe by @sergiud in https://github.com/google/glog/pull/1025
• feat: use standard atomics and call_once by @sergiud in https://github.com/google/glog/pull/1026
• fix: cleanup exports by @sergiud in https://github.com/google/glog/pull/1029
• feat: make headers self-contained by @sergiud in https://github.com/google/glog/pull/1030
• ci(codecov): enable comments by @sergiud in https://github.com/google/glog/pull/966
• fix: ensure export macro to be defined by @sergiud in https://github.com/google/glog/pull/1031
• fix: remove unused declaration by @sergiud in https://github.com/google/glog/pull/1032
• feat: make IsFailureSignalHandlerInstalled public by @sergiud in https://github.com/google/glog/pull/1033
• fix: allow setting stderrthreshold using GLOG_stderrthreshold by @sergiud in https://github.com/google/glog/pull/1034
• fix(debug): add missing parentheses in ternary expression by @sergiud in https://github.com/google/glog/pull/1035
• fix: threads are always enabled by @sergiud in https://github.com/google/glog/pull/1036
• cmake: determine when to use port.h by @sergiud in https://github.com/google/glog/pull/1037
• feat(cleanup): use chrono by @sergiud in https://github.com/google/glog/pull/1038
• feat(logger): use chrono by @sergiud in https://github.com/google/glog/pull/1039
• feat(time): use tm::tm_gmtoff if present by @sergiud in https://github.com/google/glog/pull/1040
• docs: cleanup by @sergiud in https://github.com/google/glog/pull/1041
• fix: do not export g_logging_fail_func by @sergiud in https://github.com/google/glog/pull/1042
• fix: reduce boilerplate code by @sergiud in https://github.com/google/glog/pull/1043
• docs: describe default prefix format by @sergiud in https://github.com/google/glog/pull/1045
• fix: reduce manual resource management by @sergiud in https://github.com/google/glog/pull/1046
• fix(symbolize): simplify resource management by @sergiud in https://github.com/google/glog/pull/1047
• fix(symbolize): cleanup by @sergiud in https://github.com/google/glog/pull/1048
• feat: provide fallback for accessing process name by @sergiud in https://github.com/google/glog/pull/1049
• fix: unify additional debug output by @sergiud in https://github.com/google/glog/pull/1050
• feat(dbghelp): show source line number if present by @sergiud in https://github.com/google/glog/pull/1051
• cmake: bump SOVERSION by @sergiud in https://github.com/google/glog/pull/1052
• fix: move LogMessageVoidify into internal namespace by @sergiud in https://github.com/google/glog/pull/1053
• cmake: replace check_function_exists by check_cxx_symbol_exists by @sergiud in https://github.com/google/glog/pull/1054
• fix: better encapsulate internals by @sergiud in https://github.com/google/glog/pull/1055
• fix(symbolize): use correct format specifier by @sergiud in https://github.com/google/glog/pull/1056
• fix: unify LogMessage and LogMessageInfo by @sergiud in https://github.com/google/glog/pull/1057
• cmake: rework elf detection by @sergiud in https://github.com/google/glog/pull/1058

New Contributors

• @xiaoxq made their first contribution in https://github.com/google/glog/pull/831
• @joeyparrish made their first contribution in https://github.com/google/glog/pull/835
• @lstaroth made their first contribution in https://github.com/google/glog/pull/830
• @marekcirkos made their first contribution in https://github.com/google/glog/pull/851
• @comius made their first contribution in https://github.com/google/glog/pull/863
• @jsharpe made their first contribution in https://github.com/google/glog/pull/877
• @catenacyber made their first contribution in https://github.com/google/glog/pull/878
• @uilianries made their first contribution in https://github.com/google/glog/pull/862
• @noaxp made their first contribution in https://github.com/google/glog/pull/905
• @brad0 made their first contribution in https://github.com/google/glog/pull/921
• @mai93 made their first contribution in https://github.com/google/glog/pull/916
• @Vertexwahn made their first contribution in https://github.com/google/glog/pull/919
• @ekilmer made their first contribution in https://github.com/google/glog/pull/925
• @pravinba9495 made their first contribution in https://github.com/google/glog/pull/946
• @pateldeev made their first contribution in https://github.com/google/glog/pull/890
• @bqhuyy made their first contribution in https://github.com/google/glog/pull/960
• @dependabot made their first contribution in https://github.com/google/glog/pull/970
• @lingbin made their first contribution in https://github.com/google/glog/pull/972
• @vapier made their first contribution in https://github.com/google/glog/pull/985
• @4c3y made their first contribution in https://github.com/google/glog/pull/986

Full Changelog: https://github.com/google/glog/compare/v0.6.0...v0.7.0-rc1