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= 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)) -- ((application 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
[.text-left]
xref:libnng.3.adoc[libnng(3)],
xref:nng.7.adoc[nng(7)]
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