= nng_version(3)
//
// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This document is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt).  A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//

== NAME

nng_version - report library version

== SYNOPSIS

[source, c]
-----------
#include <nng/nng.h>

const char * nng_version(void);
-----------

== DESCRIPTION

The `nng_version()` function returns a human readable version
number for the _nng_ library.  This is intended for output in
programs, and so forth.

Additionally, compile time version information is available
via some predefined macros:

`NNG_MAJOR_VERSION`:: Major version number.
`NNG_MINOR_VERSION`:: Minor version number.
`NNG_PATCH_VERSION`:: Patch version number.

The _nng_ library is developed and released using
http:///www.semver.org[Semantic Versioning 2.0], and
the version numbers reported refer to both the API and the
library itself.  (The ABI -- binary interface -- between the
library and the application is controlled in a similar, but different
manner depending upon the link options and how the library is built.)

== RETURN VALUES

C string (NUL-terminated) containing the library version number.

== ERRORS

None.

== SEE ALSO

<<libnng#,libnng(3)>>,
<<nng#,nng(7)>>