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CMake (Unix)

mkdir build && cd buildcmake .. # Default to Unix Makefiles.makemake verify # (optional)

See Documentation/Building#Building on Unix using CMake for more information.

CMake (Windows)

Install CMake: https://cmake.org/

md build && cd buildcmake -G "Visual Studio 10" .. # Or use any generator you want to use. Run cmake --help for a listcmake --build . --config Release # Or "start libevent.sln" and build with menu in Visual Studio.

See Documentation/Building#Building on Windows for more information.

Package Managers

You can download and install libevent using the vcpkg dependency manager:

git clone https://github.com/Microsoft/vcpkg.gitcd vcpkg./bootstrap-vcpkg.sh./vcpkg integrate install./vcpkg install libevent

The libevent port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please create an issue or pull request on the vcpkg repository.


Note, since 2.2 it is deprecated

./configuremakemake verify # (optional)sudo make install

See Documentation/Building#Autoconf for more information.


For the latest released version of Libevent, see the official website at https://libevent.org/ .

There's a pretty good work-in-progress manual up at http://www.wangafu.net/~nickm/libevent-book/ .

For the latest development versions of Libevent, access our Git repository via

$ git clone https://github.com/libevent/libevent.git

You can browse the git repository online at:


To report bugs, issues, or ask for new features:

Patches: https://github.com/libevent/libevent/pulls

OK, those are not really patches. You fork, modify, and hit the "Create Pull Request" button. You can still submit normal git patches via the mailing list.

Bugs, Features [RFC], and Issues: https://github.com/libevent/libevent/issues

Or you can do it via the mailing list.

There's also a libevent-users mailing list for talking about Libevent use and development:



The following people have helped with suggestions, ideas, code or fixing bugs.

tmux source code

Welcome to tmux!

tmux is a terminal multiplexer: it enables a number of terminals to be created, accessed, and controlled from a single screen. tmux may be detached from a screen and continue running in the background, then later reattached.

This release runs on OpenBSD, FreeBSD, NetBSD, Linux, macOS and Solaris.


tmux depends on libevent 2.x, available from this page.

It also depends on ncurses, available from this page.

To build tmux, a C compiler (for example gcc or clang), make, pkg-config and a suitable yacc (yacc or bison) are needed.


Binary packages

Some platforms provide binary packages for tmux, although these are sometimes out of date. Examples are listed on this page.

From release tarball

To build and install tmux from a release tarball, use:

./configure && makesudo make install

tmux can use the utempter library to update utmp(5), if it is installed - run configure with --enable-utempter to enable this.

For more detailed instructions on building and installing tmux, see this page.

From version control

To get and build the latest from version control - note that this requires autoconf, automake and pkg-config:

git clone https://github.com/tmux/tmux.gitcd tmuxsh autogen.sh./configure && make


Bug reports, feature suggestions and especially code contributions are most welcome. Please send by email to:

[email protected]

Or open a GitHub issue or pull request. Please read this document before opening an issue.

There is a list of suggestions for contributions. Please feel free to ask on the mailing list if you're thinking of working on something or need further information.


For documentation on using tmux, see the tmux.1 manpage. View it from the source tree with:

nroff -mdoc tmux.1|less

A small example configuration is in example_tmux.conf.

And a bash(1) completion file at:


For debugging, run tmux with -v or -vv to generate server and client log files in the current directory.


The tmux mailing list for general discussion and bug reports is:


Subscribe by sending an email to:

[email protected]

The Apache Kafka C/C++ library

librdkafka - the Apache Kafka C/C++ client library

Copyright (c) 2012-2022, Magnus Edenhill. 2023 Confluent Inc..


librdkafka is a C library implementation of the Apache Kafka protocol, providing Producer, Consumer and Admin clients. It was designed with message delivery reliability and high performance in mind, current figures exceed 1 million msgs/second for the producer and 3 million msgs/second for the consumer.

librdkafka is licensed under the 2-clause BSD license.

KAFKA is a registered trademark of The Apache Software Foundation and has been licensed for use by librdkafka. librdkafka has no affiliation with and is not endorsed by The Apache Software Foundation.


  • Full Exactly-Once-Semantics (EOS) support
  • High-level producer, including Idempotent and Transactional producers
  • High-level balanced KafkaConsumer (requires broker >= 0.9)
  • Simple (legacy) consumer
  • Admin client
  • Compression: snappy, gzip, lz4, zstd
  • SSL support
  • Full list of supported KIPs
  • Broker version support: >=0.8 (see Broker version compatibility)
  • Guaranteed API stability for C & C++ APIs (ABI safety guaranteed for C)
  • Statistics metrics
  • Debian package: librdkafka1 and librdkafka-dev in Debian and Ubuntu
  • RPM package: librdkafka and librdkafka-devel
  • Gentoo package: dev-libs/librdkafka
  • Portable: runs on Linux, MacOS X, Windows, Solaris, FreeBSD, AIX, ...


NOTE: The master branch is actively developed, use latest release for production use.


Installing prebuilt packages

On Mac OSX, install librdkafka with homebrew:

$ brew install librdkafka

On Debian and Ubuntu, install librdkafka from the Confluent APT repositories, see instructions here and then install librdkafka:

$ apt install librdkafka-dev

On RedHat, CentOS, Fedora, install librdkafka from the Confluent YUM repositories, instructions here and then install librdkafka:

$ yum install librdkafka-devel

On Windows, reference librdkafka.redist NuGet package in your Visual Studio project.

For other platforms, follow the source building instructions below.

Installing librdkafka using vcpkg

You can download and install librdkafka using the vcpkg dependency manager:

# Install vcpkg if not already installed$ git clone https://github.com/Microsoft/vcpkg.git$ cd vcpkg$ ./bootstrap-vcpkg.sh$ ./vcpkg integrate install# Install librdkafka$ vcpkg install librdkafka

The librdkafka package in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please create an issue or pull request on the vcpkg repository.

Build from source


The GNU toolchainGNU makepthreadszlib-dev (optional, for gzip compression support)libssl-dev (optional, for SSL and SASL SCRAM support)libsasl2-dev (optional, for SASL GSSAPI support)libzstd-dev (optional, for ZStd compression support)libcurl-dev (optional, for SASL OAUTHBEARER OIDC support)

NOTE: Static linking of ZStd (requires zstd >= 1.2.1) in the producer enables encoding the original size in the compression frame header, which will speed up the consumer. Use STATIC_LIB_libzstd=/path/to/libzstd.a ./configure --enable-static to enable static ZStd linking. MacOSX example: STATIC_LIB_libzstd=$(brew ls -v zstd | grep libzstd.a$) ./configure --enable-static


 ./configure # Or, to automatically install dependencies using the system's package manager: # ./configure --install-deps # Or, build dependencies from source: # ./configure --install-deps --source-deps-only make sudo make install

NOTE: See README.win32 for instructions how to build on Windows with Microsoft Visual Studio.

NOTE: See CMake instructions for experimental CMake build (unsupported).

Usage in code

See getting Started with Apache Kafka and C/C++ for a basic tutorial.

  1. Refer to the examples directory for code using:

    • Producers: basic producers, idempotent producers, transactional producers.
    • Consumers: basic consumers, reading batches of messages.
    • Performance and latency testing tools.
  2. Refer to the examples GitHub repo for code connecting to a cloud streaming data service based on Apache Kafka

  3. Link your program with -lrdkafka (C) or -lrdkafka++ (C++).

Commercial support

Commercial support is available from Confluent Inc

Community support

Only the latest official release is supported for community members.

File bug reports and feature requests using GitHub Issues.

Questions and discussions are welcome on the Discussions forum, and on the Confluent Community slack #clients channel.

Language bindings

See Powered by librdkafka for an incomplete list of librdkafka users.