libzmq supports a large variety of platforms. The list of platforms can be found in the README. The degree to which this support is tested varies.

Platforms are currently assigned to one of the following categories:

• supported platforms with primary CI (travis-ci.org, appveyor.com): https://travis-ci.org/zeromq/libzmq, https://ci.appveyor.com/project/zeromq/libzmq
• supported platforms with secondary CI (openSUSE Build Service): https://build.opensuse.org/project/subprojects/network:messaging:zeromq
• supported platforms with known active users
• supported platforms without known active users
• unsupported platforms

Supported platforms with primary CI

• have builds and tests run for the master branch
• have builds and tests run for every pull request
• it is a precondition for merging a pull request that no builds or tests of these platforms are broken
• contributors can easily enable these builds and tests for their branches in their fork

Suported platforms with secondary CI

• have builds and tests run for the master branch
• these are monitored periodically by the project maintainers, and efforts are made to fix any broken builds or tests in a timely manner
• it is a precondition for a release that no builds or tests of these platforms are broken

Supported platforms with known active users

• have recently been reported to the maintainers (e.g. via pull requests modifying this document) as having working builds and possibly tests

Supported platforms without known active users

• have some platform-specific code within libzmq, but it is not known if it is still working
• have been reported to the maintainers as having working builds and possibly tests only significant time/changes ago
• or are assumed to work due to similarity to the above platforms

Unsupported platforms

• are either reported to be non-working for some reason that is not trivial to fix or are explicitly missing some required platform-specific code