= zmq_has(3)


== NAME
zmq_has - check a ZMQ capability


== SYNOPSIS
*int zmq_has (const char *capability);*


== DESCRIPTION
The _zmq_has()_ function shall report whether a specified capability is
available in the library. This allows bindings and applications to probe
a library directly, for transport and security options.

Capabilities shall be lowercase strings. The following capabilities are
defined:

* ipc - the library supports the ipc:// protocol
* pgm - the library supports the pgm:// protocol
* tipc - the library supports the tipc:// protocol
* norm - the library supports the norm:// protocol
* curve - the library supports the CURVE security mechanism
* gssapi - the library supports the GSSAPI security mechanism
* draft - the library is built with the draft api

When this method is provided, the zmq.h header file will define
ZMQ_HAS_CAPABILITIES.

== RETURN VALUE
The _zmq_has()_ function shall return 1 if the specified capability is
provided. Otherwise it shall return 0.


== AUTHORS
This page was written by the 0MQ community. To make a change please
read the 0MQ Contribution Policy at <https://zeromq.org/how-to-contribute/>.