Apache Log4cxx  Version 1.2.0
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Log4cxx Dependencies

As of version 0.12.0, Log4cxx requires a minimum C++ version of C++11.

Log4cxx requires the following software to build and/or run correctly:

Dependency Name Version Dependency Type Homepage
Apache Portable Runtime(APR) >=1.5.4 Compile/Runtime https://apr.apache.org
APR-Util >=1.5.4 Compile/Runtime https://apr.apache.org
gzip any Test/Runtime(optional) https://gzip.org
sed any Test N/A
zip any Test/Runtime(optional) N/A

APR+APR-Util

The Apache Portable Runtime(APR) provides the cross-platform backend for log4cxx. Both APR and APR-util need to be installed and available on your system.

sed+gzip+zip

These applications are needed during test of log4cxx. gzipand sed are generally installed by default on Linux. zip may not be installed by default; check your distribution's documentation for information on how to install these applications.

For Windows, you will have to install those tools through a system such as MinGW, cygwin, or MSYS2.

gzip and zip only needed during runtime if you are compressing the log files, for example by setting a rollover policy which ends in .gz or .zip.

Optional Dependencies

The following table lists CMake options that require additional dependencies.

CMake option Dependency Name Version Dependency Type Homepage
LOG4CXX_MULTIPROCESS_ROLLING_FILE_APPENDER Boost any Compile/runtime. Not required if your compiler supports C++17 https://boost.org
ENABLE_FMT_LAYOUT {fmt} 9+ Compile/runtime https://github.com/fmtlib/fmt
LOG4CXX_ENABLE_ODBC unixodbc any Compile/runtime (not on Windows) https://www.unixodbc.org/
LOG4CXX_ENABLE_ESMTP libesmtp any Compile/runtime (not on Windows) https://github.com/libesmtp/libESMTP
LOG4CXX_QT_SUPPORT Qt 5 Compile/runtime https://www.qt.io/download
LOG4CXX_CFSTRING Mac OS/X Core Foundation any Compile/runtime https://developer.apple.com/documentation/corefoundation

A note on C++ version and Boost

By default, Log4cxx requests C++20 features. This is to avoid 3rd party dependencies as much as possible. If C++17 is not available, a search for Boost will be taken and those libraries will be used instead. If you would prefer to use Boost, there are two options you have:

  1. Pass -DPREFER_BOOST=ON to CMake when compiling. This will ignore the results of the tests that check for the standard version of components that are required. Note that this will switch all components, regardless of the C++ version in effect at compile time.
  2. Revert to an earlier standard using -DCMAKE_CXX_STANDARD=11 for example. This will still to check for standard versions of required components, but it will fall back to using Boost for newer components added in C++17.

Licenses(direct dependencies only)

Dependency License
APR, APR-util Apache License, Version 2.0
Boost Boost License, Version 1.0
{fmt} MIT
unixodbc LGPL
libesmtp LGPL
Qt Refer https://www.qt.io/licensing/
Mac OS/X Core Foundation APSL 2.0