Skip to content


Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
ØMQ libzmq core library -- development trunk
C++ C CMake Shell
branch: master

Fetching latest commit…

Cannot retrieve the latest commit at this time

Failed to load latest commit information.
doc doc/zmq_socket.txt: Remove note about ZMQ_PAIR being experimental.
include implement client socket type and drop messages when more flag is set …
packaging/nuget Update VS DLL and NuGet versioning to 4.2.0.
perf Remove local pgm configuration option, cleanup, remove u…
src remove temp printf from stream_engine
tests Some test fail to build targeting less that Windows Vista
tools Remove local pgm configuration option, cleanup, remove u…
tweetnacl Clean up after using randombytes from libsodium
.gitignore Issue #1382: Do not send data to backend when there are no listeners …
.hgeol Line-ending conversion rules for hg-git users and enabled use of .git…
.travis.yml Problem: qt-android build doesn't fully work for downstream builds
AUTHORS Issue #1382: Do not send data to backend when there are no listeners …
CMakeLists.txt Make CMake option for perf-tools
COPYING missing COPYING file added
COPYING.LESSER Added note about tivotisation
Dockerfile Add Docker support
INSTALL Added hint
MAINTAINERS Fixed email addresses in the MAITAINERS file Problem: incomplete specs for test_proxy_terminate
NEWS Updated development master to 4.2.x Implement a definitive cygwin target for libzmq. Converted README to markdown + added travis build img
acinclude.m4 acinclude.m4: make kernel-specific flags cacheable Copyright dates adjusted to reflect reality
branding.bmp Add ZeroMQ branding. Problem: No builtin way to build for qt-android Update
installer.ico Add ZeroMQ branding. m4_esyscmd_s doesnt seem to be portable across different systems


Build Status


The 0MQ lightweight messaging kernel is a library which extends the standard socket interfaces with features traditionally provided by specialised messaging middleware products. 0MQ sockets provide an abstraction of asynchronous message queues, multiple messaging patterns, message filtering (subscriptions), seamless access to multiple transport protocols and more.

Building and installation

See the INSTALL file included with the distribution.


Extensive documentation is provided with the distribution. Refer to doc/zmq.html, or "man zmq" after you have installed 0MQ on your system.


Development mailing list: Announcements mailing list:

Git repository:

0MQ developers can also be found on the IRC channel #zeromq, on the Freenode network (


Free use of this software is granted under the terms of the GNU Lesser General Public License (LGPL). For details see the files COPYING and COPYING.LESSER included with the 0MQ distribution.

Something went wrong with that request. Please try again.