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=pod
=head1 NAME
OPENSSL_VERSION_NUMBER, OpenSSL_version,
OpenSSL_version_num - get OpenSSL version number
=head1 SYNOPSIS
#include <openssl/opensslv.h>
#define OPENSSL_VERSION_NUMBER 0xnnnnnnnnnL
#include <openssl/crypto.h>
unsigned long OpenSSL_version_num();
const char *OpenSSL_version(int t);
=head1 DESCRIPTION
OPENSSL_VERSION_NUMBER is a numeric release version identifier:
MNNFFPPS: major minor fix patch status
The status nibble has one of the values 0 for development, 1 to e for betas
1 to 14, and f for release.
for example
0x000906000 == 0.9.6 dev
0x000906023 == 0.9.6b beta 3
0x00090605f == 0.9.6e release
Versions prior to 0.9.3 have identifiers E<lt> 0x0930.
Versions between 0.9.3 and 0.9.5 had a version identifier with this
interpretation:
MMNNFFRBB major minor fix final beta/patch
for example
0x000904100 == 0.9.4 release
0x000905000 == 0.9.5 dev
Version 0.9.5a had an interim interpretation that is like the current one,
except the patch level got the highest bit set, to keep continuity. The
number was therefore 0x0090581f.
OpenSSL_version_num() returns the version number.
The macro OPENSSL_VERSION_AT_LEAST(major,minor) can be used at compile
time test if the current version is at least as new as the version provided.
The arguments major, minor and fix correspond to the version information
as given above.
OpenSSL_version() returns different strings depending on B<t>:
=over 4
=item OPENSSL_VERSION
The text variant of the version number and the release date. For example,
"OpenSSL 1.0.1a 15 Oct 2015".
=item OPENSSL_CFLAGS
The compiler flags set for the compilation process in the form
"compiler: ..." if available or "compiler: information not available"
otherwise.
=item OPENSSL_BUILT_ON
The date of the build process in the form "built on: ..." if available
or "built on: date not available" otherwise.
=item OPENSSL_PLATFORM
The "Configure" target of the library build in the form "platform: ..."
if available or "platform: information not available" otherwise.
=item OPENSSL_DIR
The "OPENSSLDIR" setting of the library build in the form "OPENSSLDIR: "...""
if available or "OPENSSLDIR: N/A" otherwise.
=item OPENSSL_ENGINES_DIR
The "ENGINESDIR" setting of the library build in the form "ENGINESDIR: "...""
if available or "ENGINESDIR: N/A" otherwise.
=back
For an unknown B<t>, the text "not available" is returned.
=head1 RETURN VALUE
The version number.
=head1 SEE ALSO
L<crypto(3)>
=head1 COPYRIGHT
Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
=cut
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