FFI::CheckLib - Check that a library is available for FFI

<!DOCTYPE html> <html lang="en-US"> <head> <title>FFI::CheckLib - Check that a library is available for FFI - metacpan.org</title> <link rel="preload" as="fetch" href="/account/login_status" crossorigin="anonymous" /> <link href="/assets/style-XFEQ536G.css" rel="stylesheet" type="text/css"> <script src="/assets/main-WXBSEDQJ.js" type="module"></script> <link rel="alternate" type="application/rss+xml" title="Recent CPAN Uploads of FFI-CheckLib - MetaCPAN" href="/dist/FFI-CheckLib/releases.rss" /> <link rel="canonical" href="https://metacpan.org/pod/FFI::CheckLib" /> <meta name="description" content="Check that a library is available for FFI" /> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=5"> <link rel="shortcut icon" href="/static/icons/favicon.ico"> <link rel="apple-touch-icon" sizes="152x152" href="/static/icons/apple-touch-icon.png"> <link rel="search" href="/static/opensearch.xml" type="application/opensearchdescription+xml" title="MetaCPAN"> <script async src="https://perl-ads.perlhacks.com/perl-ads.js"></script> <script async src="https://www.googletagmanager.com/gtag/js?id=G-E82Q2V8LVD"></script> <meta property="og:site_name" content="MetaCPAN" /> <meta name="twitter:site" content="@metacpan" /> <meta property="og:type" content="article" /> <meta name="twitter:card" content="summary" /> <meta property="og:url" content="https://metacpan.org/pod/FFI::CheckLib" /> <meta property="og:title" content="FFI::CheckLib" /> <meta property="og:description" content="Check that a library is available for FFI" /> <meta property="og:image" content="https://metacpan.org/static/images/dots.png" /> </head> <body> <nav class="navbar navbar-default" role="navigation"> <div class="header-logo-large hidden-xs"> <a href="/" tabindex="0"> <svg class="logo" aria-label="MetaCPAN"> <use class="logo" href="/static/images/metacpan-logo.svg#logo" /> </svg> </a> </div> <div class="header-logo-icon visible-xs"> <a href="/"> <svg class="logo" aria-label="MetaCPAN"> <use class="logo" href="/static/images/metacpan-logo.svg#dots" /> </svg> </a> </div> <ul class="nav navbar-nav menu-items hidden-xs hidden-sm"> <li><a href="/about">About</a></li> <li><a href="/about/sponsors">Sponsor</a></li> <li><a href="https://grep.metacpan.org/">grep::cpan</a></li> <li><a href="/recent">Recent</a></li> <li><a href="/about/faq">FAQ</a></li> <li><a href="/tools">Tools</a></li> <li><a href="https://fastapi.metacpan.org/">API</a></li> </ul> <ul class="nav navbar-nav navbar-right"> <button type="button" class="searchbar-btn visible-xs visible-sm"> <i class="fa fa-search button-fa-icon"></i> </button> <form action="/search" class="searchbar-form visible-md visible-lg search-form form-horizontal"> <input type="hidden" name="size" id="metacpan_search-size" value="20"> <div class="form-group"> <div class="search-group"> <i class="fa fa-search"></i> <input type="text" name="q" placeholder="Search the CPAN" size="41" autocorrect="off" autocapitalize="off" spellcheck="false" id="metacpan_search-input" class="form-control" value=""> </div> </div> </form> <li class="icon-slidepanel visible-xs visible-sm"> <button data-toggle="slidepanel" data-target=".slidepanel"> <span class="button-fa-icon"> <i class="fa fa-bars slidepanel-open"></i> <i class="fa fa-times slidepanel-close"></i> </span> </button> </li> <li class="dropdown login-dropdown show-logged-in"> <button type="button" class="dropdown-toggle" data-toggle="dropdown"> <i class="fa fa-user button-fa-icon logged-in-icon" aria-hidden="true"></i> <i class="fas fa-chevron-down"></i> </button> <ul class="dropdown-menu"> <li><a href="/account/identities">Identities</a></li> <li><a href="/account/profile">Profile</a></li> <li><a href="/account/favorite/list">Favorites</a></li> <li> <a href="#" type="button" class="logout-button"> Logout </a> </li> </ul> </li> <li class="dropdown login-dropdown show-logged-out"> <button type="button" class="dropdown-toggle" data-toggle="dropdown"> <i class="fa fa-user button-fa-icon avatar-placeholder" aria-hidden="true"></i> <i class="fas fa-chevron-down"></i> </button> <ul class="dropdown-menu"> <li> <a href="/login/github"> <i class="fab fa-github fa-fw"></i> GitHub </a> </li> <li> <a href="/login/twitter"> <i class="fab fa-twitter fa-fw"></i> Twitter </a> </li> <li> <a href="/login/google"> <i class="fab fa-google fa-fw"></i> Google </a> </li> </ul> </li> <li class="dropdown login-dropdown hide-logged-in hide-logged-out"> <button> <i class="fa fa-user button-fa-icon" aria-hidden="true"></i> </button> </li> </ul> </nav> <div class="page-content "> <div id="perl-ad-target" class="top-notify-banner perl-ad-target"> </div> <nav class="sidebar"> <div class="slidepanel"> <ul class="nav-list "> <li class="nav-header no-margin-top"> <div class="ttip" data-toggle="tooltip" data-placement="bottom" title="The date that this version of FFI-CheckLib was released."> <span class="relatize">30 Sep 2022 13:43:30 UTC</span> </div> </li> <li> Distribution: <a href="/dist/FFI-CheckLib">FFI-CheckLib</a> </li> <li> Module version: 0.31 </li> <li> <a data-keyboard-shortcut="g s" href="/dist/FFI-CheckLib/source/lib/FFI/CheckLib.pm">Source</a> (<a href="/dist/FFI-CheckLib/source/lib/FFI/CheckLib.pm?raw=1">raw</a>) </li> <li> <a data-keyboard-shortcut="g b" href="/dist/FFI-CheckLib/source/lib/FFI">Browse</a> (<a href="/dist/FFI-CheckLib/source/lib/FFI?raw=1">raw</a>) </li> <li> <a data-keyboard-shortcut="g c" href="/dist/FFI-CheckLib/changes">Changes</a> </li> <li> <a rel="noopener nofollow" class="nopopup" href="https://metacpan.org/pod/FFI::CheckLib">Homepage</a> </li> <li> <a class="nopopup" href="/dist/FFI-CheckLib/contribute">How to Contribute</a> </li> <li> <a rel="noopener nofollow" data-keyboard-shortcut="g r" href="https://github.com/PerlFFI/FFI-CheckLib">Repository</a> </li> <li> <a rel="noopener nofollow" data-keyboard-shortcut="g i" href="https://github.com/PerlFFI/FFI-CheckLib/issues">Issues</a> (1) </li> <li> <a rel="noopener nofollow" href="http://matrix.cpantesters.org/?dist=FFI-CheckLib+0.31" title="Matrix">Testers</a> <span title="(pass / fail / na)">(<a rel="noopener nofollow" href="https://www.cpantesters.org/distro/F/FFI-CheckLib.html?oncpan=1&distmat=1&version=0.31&grade=2" style="color: #090">4938</a> / <a rel="noopener nofollow" href="https://www.cpantesters.org/distro/F/FFI-CheckLib.html?oncpan=1&distmat=1&version=0.31&grade=3" style="color: #900">1</a> / <a rel="noopener nofollow" href="https://www.cpantesters.org/distro/F/FFI-CheckLib.html?oncpan=1&distmat=1&version=0.31&grade=4">2</a>)</span> </li> <li> <a rel="noopener nofollow" href="http://cpants.cpanauthors.org/release/PLICEASE/FFI-CheckLib-0.31">Kwalitee</a> </li> <li> <div class="ttip" data-toggle="tooltip" data-placement="bottom" title="The # people with an indexing permission on FFI-CheckLib who have released something to CPAN in the last 2 years (i.e. the # people likely able to release critical fixes in a timely manner)"> Bus factor: 1 </div> </li> <li> <a rel="noopener nofollow" href="http://cpancover.com/latest/FFI-CheckLib-0.31/index.html">77.06% Coverage </a> </li> <li> License: perl_5 </li> <li> Perl: v5.6.0 </li> <li class="chat-banner"> <div><a rel="noopener nofollow" target="_blank" href="https://kiwiirc.com/nextclient/#irc://irc.perl.org/#native?nick=mc-guest-?">Chat with us!</a></div> </li> <li class="nav-header">Activity</li> <li> <div class="activity-graph"> <img src="/dist/FFI-CheckLib/activity.svg?res=month" /> <div class="comment">24 month</div> </div> </li> <li class="nav-header">Tools</li> <li> <a itemprop="downloadUrl" href="https://cpan.metacpan.org/authors/id/P/PL/PLICEASE/FFI-CheckLib-0.31.tar.gz"> Download (<span itemprop="fileSize">36.29KB</span>)</a> </li> <li> <a href="https://explorer.metacpan.org/?url=%2Fmodule%2FPLICEASE%2FFFI-CheckLib-0.31%2Flib%2FFFI%2FCheckLib.pm"> MetaCPAN Explorer </a> </li> <li> <a href="/dist/FFI-CheckLib/permissions"> Permissions </a> </li> <li> <a href="/dist/FFI-CheckLib/releases.rss"> Subscribe to distribution </a> </li> <li> <button class="btn btn-link" data-toggle="modal" data-target="#metacpan_install-instructions-dialog"> Install Instructions </button> </li> <li> <form action="/search"> <input type="hidden" name="q" value="dist:FFI-CheckLib"> <input type="search" name="q" placeholder="Search distribution" class="form-control tool-bar-form"> <input type="submit" style="display: none"> </form> </li> <li> <form action="https://grep.metacpan.org/search"> <input type="hidden" name="qd" value="FFI-CheckLib"> <input type="hidden" name="source" value="metacpan"> <input type="search" name="q" placeholder="grep distribution" class="form-control tool-bar-form"> <input type="submit" style="display: none"> </form> </li> <li class="version-jump"> <select class="select-navigator form-control tool-bar-form"> <option disabled selected>Jump to version</option> <option disabled value="/release/PLICEASE/FFI-CheckLib-0.31/view/lib/FFI/CheckLib.pm" >0.31 (PLICEASE on 2022-09-30)</option> <optgroup label="BackPAN">' <option value="/release/PLICEASE/FFI-CheckLib-0.30/view/lib/FFI/CheckLib.pm" >0.30 (PLICEASE on 2022-09-22)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.29/view/lib/FFI/CheckLib.pm" >0.29 (PLICEASE on 2022-09-10)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.28/view/lib/FFI/CheckLib.pm" >0.28 (PLICEASE on 2021-05-16)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.27/view/lib/FFI/CheckLib.pm" >0.27 (PLICEASE on 2020-05-11)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.26/view/lib/FFI/CheckLib.pm" >0.26 (PLICEASE on 2020-01-22)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.25/view/lib/FFI/CheckLib.pm" >0.25 (PLICEASE on 2019-06-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.24/view/lib/FFI/CheckLib.pm" >0.24 (PLICEASE on 2019-04-27)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.23/view/lib/FFI/CheckLib.pm" >0.23 (PLICEASE on 2018-11-18)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.22/view/lib/FFI/CheckLib.pm" >0.22 (PLICEASE on 2018-10-14)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.21_01/view/lib/FFI/CheckLib.pm" >0.21_01 DEV (PLICEASE on 2018-10-12)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.20/view/lib/FFI/CheckLib.pm" >0.20 (PLICEASE on 2018-06-04)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.19/view/lib/FFI/CheckLib.pm" >0.19 (PLICEASE on 2018-05-31)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.18/view/lib/FFI/CheckLib.pm" >0.18 (PLICEASE on 2017-10-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.17_02/view/lib/FFI/CheckLib.pm" >0.17_02 DEV (PLICEASE on 2017-10-14)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.17_01/view/lib/FFI/CheckLib.pm" >0.17_01 DEV (PLICEASE on 2017-10-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.16/view/lib/FFI/CheckLib.pm" >0.16 (PLICEASE on 2017-08-08)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.15/view/lib/FFI/CheckLib.pm" >0.15 (PLICEASE on 2016-05-05)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.14/view/lib/FFI/CheckLib.pm" >0.14 (PLICEASE on 2015-09-09)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.12/view/lib/FFI/CheckLib.pm" >0.12 (PLICEASE on 2015-08-06)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.11/view/lib/FFI/CheckLib.pm" >0.11 (PLICEASE on 2015-02-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.10/view/lib/FFI/CheckLib.pm" >0.10 (PLICEASE on 2015-02-12)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.09/view/lib/FFI/CheckLib.pm" >0.09 (PLICEASE on 2015-01-28)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.08/view/lib/FFI/CheckLib.pm" >0.08 (PLICEASE on 2015-01-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.07/view/lib/FFI/CheckLib.pm" >0.07 (PLICEASE on 2015-01-16)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.06/view/lib/FFI/CheckLib.pm" >0.06 (PLICEASE on 2015-01-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.05/view/lib/FFI/CheckLib.pm" >0.05 (PLICEASE on 2015-01-10)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.04/view/lib/FFI/CheckLib.pm" >0.04 (PLICEASE on 2015-01-02)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.03/view/lib/FFI/CheckLib.pm" >0.03 (PLICEASE on 2014-10-26)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.02/view/lib/FFI/CheckLib.pm" >0.02 (PLICEASE on 2014-10-26)</option> </optgroup> </select> </li> <li class="version-diff"> <select class="select-navigator form-control tool-bar-form"> <option disabled selected>Diff with version</option> <option disabled value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.31/lib/FFI/CheckLib.pm" >0.31 (PLICEASE on 2022-09-30)</option> <optgroup label="BackPAN">' <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.30/lib/FFI/CheckLib.pm" >0.30 (PLICEASE on 2022-09-22)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.29/lib/FFI/CheckLib.pm" >0.29 (PLICEASE on 2022-09-10)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.28/lib/FFI/CheckLib.pm" >0.28 (PLICEASE on 2021-05-16)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.27/lib/FFI/CheckLib.pm" >0.27 (PLICEASE on 2020-05-11)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.26/lib/FFI/CheckLib.pm" >0.26 (PLICEASE on 2020-01-22)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.25/lib/FFI/CheckLib.pm" >0.25 (PLICEASE on 2019-06-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.24/lib/FFI/CheckLib.pm" >0.24 (PLICEASE on 2019-04-27)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.23/lib/FFI/CheckLib.pm" >0.23 (PLICEASE on 2018-11-18)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.22/lib/FFI/CheckLib.pm" >0.22 (PLICEASE on 2018-10-14)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.21_01/lib/FFI/CheckLib.pm" >0.21_01 DEV (PLICEASE on 2018-10-12)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.20/lib/FFI/CheckLib.pm" >0.20 (PLICEASE on 2018-06-04)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.19/lib/FFI/CheckLib.pm" >0.19 (PLICEASE on 2018-05-31)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.18/lib/FFI/CheckLib.pm" >0.18 (PLICEASE on 2017-10-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.17_02/lib/FFI/CheckLib.pm" >0.17_02 DEV (PLICEASE on 2017-10-14)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.17_01/lib/FFI/CheckLib.pm" >0.17_01 DEV (PLICEASE on 2017-10-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.16/lib/FFI/CheckLib.pm" >0.16 (PLICEASE on 2017-08-08)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.15/lib/FFI/CheckLib.pm" >0.15 (PLICEASE on 2016-05-05)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.14/lib/FFI/CheckLib.pm" >0.14 (PLICEASE on 2015-09-09)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.12/lib/FFI/CheckLib.pm" >0.12 (PLICEASE on 2015-08-06)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.11/lib/FFI/CheckLib.pm" >0.11 (PLICEASE on 2015-02-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.10/lib/FFI/CheckLib.pm" >0.10 (PLICEASE on 2015-02-12)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.09/lib/FFI/CheckLib.pm" >0.09 (PLICEASE on 2015-01-28)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.08/lib/FFI/CheckLib.pm" >0.08 (PLICEASE on 2015-01-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.07/lib/FFI/CheckLib.pm" >0.07 (PLICEASE on 2015-01-16)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.06/lib/FFI/CheckLib.pm" >0.06 (PLICEASE on 2015-01-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.05/lib/FFI/CheckLib.pm" >0.05 (PLICEASE on 2015-01-10)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.04/lib/FFI/CheckLib.pm" >0.04 (PLICEASE on 2015-01-02)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.03/lib/FFI/CheckLib.pm" >0.03 (PLICEASE on 2014-10-26)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.31/diff/PLICEASE/FFI-CheckLib-0.02/lib/FFI/CheckLib.pm" >0.02 (PLICEASE on 2014-10-26)</option> </optgroup> </select> </li> <li> <ul class="dependencies"> <li class="nav-header">Dependencies</li> <li><a href="/pod/File::Which" title="File::Which" class="ellipsis">File::Which</a></li> <li><a href="/pod/List::Util" title="List::Util" class="ellipsis">List::Util</a></li> <li> <hr> </li> <li> <a href="/module/FFI::CheckLib/requires">Reverse dependencies</a> </li> <li> <a href="http://deps.cpantesters.org/?module=FFI%3A%3ACheckLib">CPAN Testers List</a> </li> <li> <a href="https://cpandeps.grinnz.com/?dist=FFI-CheckLib">Dependency graph</a> </li> </ul> </li> <li class="nav-header">Permalinks</li> <li> <a href="/release/PLICEASE/FFI-CheckLib-0.31/view/lib/FFI/CheckLib.pm">This version</a> </li> <li> <a href="/pod/FFI::CheckLib">Latest version</a> </li> <li> <div class="plussers"> <div class="nav-header">++ed by:</div> <div> <a class="display-all" href="/author/CXW"><img src="https://www.gravatar.com/avatar/ec93ac2048df160fd3bb209d84e735f0?d=identicon&s=20" title="CXW" alt="CXW"></a> <a class="display-all" href="/author/DRAKON"><img src="https://www.gravatar.com/avatar/47f3c8e725bfee96d54eb9e8b8faf3db?d=identicon&s=20" title="DRAKON" alt="DRAKON"></a> <a class="display-all" href="/author/ILUX"><img src="https://www.gravatar.com/avatar/1cd0eea5e6ca13346060bb9d2c1e286b?d=identicon&s=20" title="ILUX" alt="ILUX"></a> <a class="display-all" href="/author/KES"><img src="https://www.gravatar.com/avatar/e8530f00b43b4f6a056f8ad4ee52ea47?d=identicon&s=20" title="KES" alt="KES"></a> <a class="display-all" href="/author/AERO"><img src="https://www.gravatar.com/avatar/c178cdf81a17c1c59c6ee898d9e09ccf?d=identicon&s=20" title="AERO" alt="AERO"></a> </div>  <div> <a href="/dist/FFI-CheckLib/plussers">6 PAUSE users</a> </div> <div> 7 non-PAUSE users </div> </div> </li> <li> <div> <button class="contributors-show-button btn-link">and 7 contributors</button> <div id="metacpan_contributors" class="slide-out slide-out-hidden"> <div> <ul> <li class="contributor" > Bakkiaraj Murugesan (bakkiaraj) </li> <li class="contributor" > Carlos D. Álvaro (cdalvaro) </li> <li class="contributor" > Dan Book (grinnz, DBOOK) </li> <li class="contributor" > Ilya Pavlov (Ilya, ILUX) </li> <li class="contributor" > Michael R. Davis (MRDVT) </li> <li class="contributor" > Petr Písař (ppisar) </li> <li class="contributor" > Shawn Laffan (SLAFFAN) </li> </ul> </div> </div> </div> </li> </ul> </div> </nav> <div class="content-navigation"> <div class="breadcrumbs"> <span> <a data-keyboard-shortcut="g a" rel="author" href="/author/PLICEASE" class="author-name">Graham Ollis 🔥🐉</a> </span> <span> / </span> <div class="release dist-release status-latest maturity-released"> <span class="dropdown"><b class="caret"></b></span> <select class="select-navigator "> <option selected value="/release/PLICEASE/FFI-CheckLib-0.31/view/lib/FFI/CheckLib.pm" >0.31 (PLICEASE on 2022-09-30)</option> <optgroup label="BackPAN">' <option value="/release/PLICEASE/FFI-CheckLib-0.30/view/lib/FFI/CheckLib.pm" >0.30 (PLICEASE on 2022-09-22)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.29/view/lib/FFI/CheckLib.pm" >0.29 (PLICEASE on 2022-09-10)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.28/view/lib/FFI/CheckLib.pm" >0.28 (PLICEASE on 2021-05-16)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.27/view/lib/FFI/CheckLib.pm" >0.27 (PLICEASE on 2020-05-11)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.26/view/lib/FFI/CheckLib.pm" >0.26 (PLICEASE on 2020-01-22)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.25/view/lib/FFI/CheckLib.pm" >0.25 (PLICEASE on 2019-06-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.24/view/lib/FFI/CheckLib.pm" >0.24 (PLICEASE on 2019-04-27)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.23/view/lib/FFI/CheckLib.pm" >0.23 (PLICEASE on 2018-11-18)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.22/view/lib/FFI/CheckLib.pm" >0.22 (PLICEASE on 2018-10-14)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.21_01/view/lib/FFI/CheckLib.pm" >0.21_01 DEV (PLICEASE on 2018-10-12)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.20/view/lib/FFI/CheckLib.pm" >0.20 (PLICEASE on 2018-06-04)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.19/view/lib/FFI/CheckLib.pm" >0.19 (PLICEASE on 2018-05-31)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.18/view/lib/FFI/CheckLib.pm" >0.18 (PLICEASE on 2017-10-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.17_02/view/lib/FFI/CheckLib.pm" >0.17_02 DEV (PLICEASE on 2017-10-14)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.17_01/view/lib/FFI/CheckLib.pm" >0.17_01 DEV (PLICEASE on 2017-10-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.16/view/lib/FFI/CheckLib.pm" >0.16 (PLICEASE on 2017-08-08)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.15/view/lib/FFI/CheckLib.pm" >0.15 (PLICEASE on 2016-05-05)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.14/view/lib/FFI/CheckLib.pm" >0.14 (PLICEASE on 2015-09-09)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.12/view/lib/FFI/CheckLib.pm" >0.12 (PLICEASE on 2015-08-06)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.11/view/lib/FFI/CheckLib.pm" >0.11 (PLICEASE on 2015-02-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.10/view/lib/FFI/CheckLib.pm" >0.10 (PLICEASE on 2015-02-12)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.09/view/lib/FFI/CheckLib.pm" >0.09 (PLICEASE on 2015-01-28)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.08/view/lib/FFI/CheckLib.pm" >0.08 (PLICEASE on 2015-01-25)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.07/view/lib/FFI/CheckLib.pm" >0.07 (PLICEASE on 2015-01-16)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.06/view/lib/FFI/CheckLib.pm" >0.06 (PLICEASE on 2015-01-13)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.05/view/lib/FFI/CheckLib.pm" >0.05 (PLICEASE on 2015-01-10)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.04/view/lib/FFI/CheckLib.pm" >0.04 (PLICEASE on 2015-01-02)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.03/view/lib/FFI/CheckLib.pm" >0.03 (PLICEASE on 2014-10-26)</option> <option value="/release/PLICEASE/FFI-CheckLib-0.02/view/lib/FFI/CheckLib.pm" >0.02 (PLICEASE on 2014-10-26)</option> </optgroup> </select> <a data-keyboard-shortcut="g d" class="release-name" href="/dist/FFI-CheckLib">FFI-CheckLib-0.31</a> </div> <span class="river-gauge-gauge"> <svg width="24px" height="15px" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <g> <title> River stage four 
 • 52 direct dependents 
 • 1488 total dependents </title> <rect x="0" y="0" width="4" height="15" fill="#7ea3f2" /> <rect x="5" y="0" width="4" height="15" fill="#7ea3f2" /> <rect x="10" y="0" width="4" height="15" fill="#7ea3f2" /> <rect x="15" y="0" width="4" height="15" fill="#7ea3f2" /> <rect x="20" y="0" width="4" height="15" fill="#e4e2e2" /> </g> </svg> </span> <div id="FFI-CheckLib-fav" class="show-logged-in"> <form action="/account/favorite/add" style="display: inline" method="POST"> <input type="hidden" name="remove" value="0"> <input type="hidden" name="release" value="FFI-CheckLib-0.31"> <input type="hidden" name="author" value="PLICEASE"> <input type="hidden" name="distribution" value="FFI-CheckLib"> <button type="submit" class="favorite highlight"><span>13</span> ++</button> </form> </div> <div class="show-logged-out"> <button class="fav-not-logged-in favorite highlight"><span>13</span> ++</button> </div> / <span>FFI::CheckLib</span> </div> </div> <main class="content"> <nav class="toc"> <div class="toc-header"><strong>Contents</strong></div> <ul> <li><a href="#NAME">NAME</a></li> <li><a href="#VERSION">VERSION</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#FUNCTIONS">FUNCTIONS</a> <ul> <li><a href="#find_lib">find_lib</a></li> <li><a href="#assert_lib">assert_lib</a></li> <li><a href="#check_lib_or_exit">check_lib_or_exit</a></li> <li><a href="#find_lib_or_exit">find_lib_or_exit</a></li> <li><a href="#find_lib_or_die">find_lib_or_die</a></li> <li><a href="#check_lib">check_lib</a></li> <li><a href="#which">which</a></li> <li><a href="#where">where</a></li> <li><a href="#has_symbols">has_symbols</a></li> <li><a href="#system_path">system_path</a></li> </ul> </li> <li><a href="#ENVIRONMENT">ENVIRONMENT</a></li> <li><a href="#FAQ">FAQ</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#AUTHOR">AUTHOR</a></li> <li><a href="#COPYRIGHT-AND-LICENSE">COPYRIGHT AND LICENSE</a></li> </ul></nav> <div class="pod anchors"> <h1 id="NAME">NAME</h1> <p>FFI::CheckLib - Check that a library is available for FFI</p> <h1 id="VERSION">VERSION</h1> <p>version 0.31</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code>use FFI::CheckLib; check_lib_or_exit( lib => 'jpeg', symbol => 'jinit_memory_mgr' ); check_lib_or_exit( lib => [ 'iconv', 'jpeg' ] ); # or prompt for path to library and then: print "where to find jpeg library: "; my $path = <STDIN>; check_lib_or_exit( lib => 'jpeg', libpath => $path );</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>This module checks whether a particular dynamic library is available for FFI to use. It is modeled heavily on <a href="/pod/Devel::CheckLib">Devel::CheckLib</a>, but will find dynamic libraries even when development packages are not installed. It also provides a <a href="/pod/FFI::CheckLib#find_lib">find_lib</a> function that will return the full path to the found dynamic library, which can be feed directly into <a href="/pod/FFI::Platypus">FFI::Platypus</a> or another FFI system.</p> <p>Although intended mainly for FFI modules via <a href="/pod/FFI::Platypus">FFI::Platypus</a> and similar, this module does not actually use any FFI to do its detection and probing. This module does not have any non-core runtime dependencies. The test suite does depend on <a href="/pod/Test2::Suite">Test2::Suite</a>.</p> <h1 id="FUNCTIONS">FUNCTIONS</h1> <p>All of these take the same named parameters and are exported by default.</p> <h2 id="find_lib">find_lib</h2> <pre><code>my(@libs) = find_lib(%args);</code></pre> <p>This will return a list of dynamic libraries, or empty list if none were found.</p> <p>[version 0.05]</p> <p>If called in scalar context it will return the first library found.</p> <p>Arguments are key value pairs with these keys:</p> <dl> <dt id="lib">lib</dt> <dd> <p>Must be either a string with the name of a single library or a reference to an array of strings of library names. Depending on your platform, <code>CheckLib</code> will prepend <code>lib</code> or append <code>.dll</code> or <code>.so</code> when searching.</p> <p>[version 0.11]</p> <p>As a special case, if <code>*</code> is specified then any libs found will match.</p> </dd> <dt id="libpath">libpath</dt> <dd> <p>A string or array of additional paths to search for libraries.</p> </dd> <dt id="systempath">systempath</dt> <dd> <p>[version 0.11]</p> <p>A string or array of system paths to search for instead of letting <a href="/pod/FFI::CheckLib">FFI::CheckLib</a> determine the system path. You can set this to <code>[]</code> in order to not search <i>any</i> system paths.</p> </dd> <dt id="symbol">symbol</dt> <dd> <p>A string or a list of symbol names that must be found.</p> </dd> <dt id="verify">verify</dt> <dd> <p>A code reference used to verify a library really is the one that you want. It should take two arguments, which is the name of the library and the full path to the library pathname. It should return true if it is acceptable, and false otherwise. You can use this in conjunction with <a href="/pod/FFI::Platypus">FFI::Platypus</a> to determine if it is going to meet your needs. Example:</p> <pre><code>use FFI::CheckLib; use FFI::Platypus; my($lib) = find_lib( lib => 'foo', verify => sub { my($name, $libpath) = @_; my $ffi = FFI::Platypus->new; $ffi->lib($libpath); my $f = $ffi->function('foo_version', [] => 'int'); return $f->call() >= 500; # we accept version 500 or better }, );</code></pre> </dd> <dt id="recursive">recursive</dt> <dd> <p>[version 0.11]</p> <p>Recursively search for libraries in any non-system paths (those provided via <code>libpath</code> above).</p> </dd> <dt id="try_linker_script">try_linker_script</dt> <dd> <p>[version 0.24]</p> <p>Some vendors provide <code>.so</code> files that are linker scripts that point to the real binary shared library. These linker scripts can be used by gcc or clang, but are not directly usable by <a href="/pod/FFI::Platypus">FFI::Platypus</a> and friends. On select platforms, this options will use the linker command (<code>ld</code>) to attempt to resolve the real <code>.so</code> for non-binary files. Since there is extra overhead this is off by default.</p> <p>An example is libyaml on Red Hat based Linux distributions. On Debian these are handled with symlinks and no trickery is required.</p> </dd> <dt id="alien">alien</dt> <dd> <p>[version 0.25]</p> <p>If no libraries can be found, try the given aliens instead. The Alien classes specified must provide the <a href="/pod/Alien::Base">Alien::Base</a> interface for dynamic libraries, which is to say they should provide a method called <code>dynamic_libs</code> that returns a list of dynamic libraries.</p> <p>[version 0.28]</p> <p>In 0.28 and later, if the <a href="/pod/Alien">Alien</a> is not installed then it will be ignored and this module will search in system or specified directories only. This module <i>will</i> still throw an exception, if the <a href="/pod/Alien">Alien</a> doesn't look like a module name or if it does not provide a <code>dynamic_libs</code> method (which is implemented by all <a href="/pod/Alien::Base">Alien::Base</a> subclasses).</p> <p>[version 0.30] [breaking change]</p> <p>Starting with version 0.30, libraries provided by <a href="/pod/Alien">Alien</a>s is preferred over the system libraries. The original thinking was that you want to prefer the system libraries because they are more likely to get patched with regular system updates. Unfortunately, the reason a module needs to install an Alien is likely because the system library is not new enough, so we now prefer the <a href="/pod/Alien">Alien</a>s instead.</p> </dd> </dl> <h2 id="assert_lib">assert_lib</h2> <pre><code>assert_lib(%args);</code></pre> <p>This behaves exactly the same as <a href="/pod/FFI::CheckLib#find_lib">find_lib</a>, except that instead of returning empty list of failure it throws an exception.</p> <h2 id="check_lib_or_exit">check_lib_or_exit</h2> <pre><code>check_lib_or_exit(%args);</code></pre> <p>This behaves exactly the same as <a href="/pod/FFI::CheckLib#assert_lib">assert_lib</a>, except that instead of dying, it warns (with exactly the same error message) and exists. This is intended for use in <code>Makefile.PL</code> or <code>Build.PL</code></p> <h2 id="find_lib_or_exit">find_lib_or_exit</h2> <p>[version 0.05]</p> <pre><code>my(@libs) = find_lib_or_exit(%args);</code></pre> <p>This behaves exactly the same as <a href="/pod/FFI::CheckLib#find_lib">find_lib</a>, except that if the library is not found, it will call exit with an appropriate diagnostic.</p> <h2 id="find_lib_or_die">find_lib_or_die</h2> <p>[version 0.06]</p> <pre><code>my(@libs) = find_lib_or_die(%args);</code></pre> <p>This behaves exactly the same as <a href="/pod/FFI::CheckLib#find_lib">find_lib</a>, except that if the library is not found, it will die with an appropriate diagnostic.</p> <h2 id="check_lib">check_lib</h2> <pre><code>my $bool = check_lib(%args);</code></pre> <p>This behaves exactly the same as <a href="/pod/FFI::CheckLib#find_lib">find_lib</a>, except that it returns true (1) on finding the appropriate libraries or false (0) otherwise.</p> <h2 id="which">which</h2> <p>[version 0.17]</p> <pre><code>my $path = which($name);</code></pre> <p>Return the path to the first library that matches the given name.</p> <p>Not exported by default.</p> <h2 id="where">where</h2> <p>[version 0.17]</p> <pre><code>my @paths = where($name);</code></pre> <p>Return the paths to all the libraries that match the given name.</p> <p>Not exported by default.</p> <h2 id="has_symbols">has_symbols</h2> <p>[version 0.17]</p> <pre><code>my $bool = has_symbols($path, @symbol_names);</code></pre> <p>Returns true if <i>all</i> of the symbols can be found in the dynamic library located at the given path. Can be useful in conjunction with <code>verify</code> with <code>find_lib</code> above.</p> <p>Not exported by default.</p> <h2 id="system_path">system_path</h2> <p>[version 0.20]</p> <pre><code>my $path = FFI::CheckLib::system_path;</code></pre> <p>Returns the system path as a list reference. On some systems, this is <code>PATH</code> on others it might be <code>LD_LIBRARY_PATH</code> on still others it could be something completely different. So although you <i>may</i> add items to this list, you should probably do some careful consideration before you do so.</p> <p>This function is not exportable, even on request.</p> <h1 id="ENVIRONMENT">ENVIRONMENT</h1> <p><a href="/pod/FFI::CheckLib">FFI::CheckLib</a> responds to these environment variables:</p> <dl> <dt id="FFI_CHECKLIB_PACKAGE">FFI_CHECKLIB_PACKAGE</dt> <dd> <p>On macOS platforms with <a href="http://brew.sh">Homebrew</a> and/or <a href="https://www.macports.org">MacPorts</a> installed, their corresponding lib paths will be automatically appended to <code>$system_path</code>. In case of having both managers installed, Homebrew will appear before.</p> <p>This behaviour can be overridden using the environment variable <code>FFI_CHECKLIB_PACKAGE</code>.</p> <p>Allowed values are:</p> <p>- <code>none</code>: Won't use either Homebrew's path nor MacPorts - <code>homebrew</code>: Will append <code>$(brew --prefix)/lib</code> to the system paths - <code>macports</code>: Will append <code>port</code>'s default lib path</p> <p>A comma separated list is also valid:</p> <pre><code>export FFI_CHECKLIB_PACKAGE=macports,homebrew</code></pre> <p>Order matters. So in this example, MacPorts' lib path appears before Homebrew's path.</p> </dd> <dt id="FFI_CHECKLIB_PATH">FFI_CHECKLIB_PATH</dt> <dd> <p>List of directories that will be considered by <a href="/pod/FFI::CheckLib">FFI::CheckLib</a> as additional "system directories". They will be searched before other system directories but after <code>libpath</code>. The variable is colon separated on Unix and semicolon separated on Windows. If you use this variable, <code>FFI_CHECKLIB_PACKAGE</code> will be ignored.</p> </dd> <dt id="PATH">PATH</dt> <dd> <p>On Windows the <code>PATH</code> environment variable will be used as a search path for libraries.</p> </dd> </dl> <p>On some operating systems <code>LD_LIBRARY_PATH</code>, <code>DYLD_LIBRARY_PATH</code>, <code>DYLD_FALLBACK_LIBRARY_PATH</code> or others <i>may</i> be used as part of the search for dynamic libraries and <i>may</i> be used (indirectly) by <a href="/pod/FFI::CheckLib">FFI::CheckLib</a> as well.</p> <h1 id="FAQ">FAQ</h1> <dl> <dt id="Why-not-just-use-dlopen?"><a id="Why"></a><a id="Why-not-just-use-dlopen"></a>Why not just use <code>dlopen</code>?</dt> <dd> <p>Calling <code>dlopen</code> on a library name and then <code>dlclose</code> immediately can tell you if you have the exact name of a library available on a system. It does have a number of drawbacks as well.</p> <dl> <dt id="No-absolute-or-relative-path"><a id="No"></a>No absolute or relative path</dt> <dd> <p>It only tells you that the library is <i>somewhere</i> on the system, not having the absolute or relative path makes it harder to generate useful diagnostics.</p> </dd> <dt id="POSIX-only"><a id="POSIX"></a>POSIX only</dt> <dd> <p>This doesn't work on non-POSIX systems like Microsoft Windows. If you are using a POSIX emulation layer on Windows that provides <code>dlopen</code>, like Cygwin, there are a number of gotchas there as well. Having a layer written in Perl handles this means that developers on Unix can develop FFI that will more likely work on these platforms without special casing them.</p> </dd> <dt id="inconsistent-implementations"><a id="inconsistent"></a>inconsistent implementations</dt> <dd> <p>Even on POSIX systems you have inconsistent implementations. OpenBSD for example don't usually include symlinks for <code>.so</code> files meaning you need to know the exact <code>.so</code> version.</p> </dd> <dt id="non-system-directories"><a id="non"></a>non-system directories</dt> <dd> <p>By default <code>dlopen</code> only works for libraries in the system paths. Most platforms have a way of configuring the search for different non-system paths, but none of them are portable, and are usually discouraged anyway. <a href="/pod/Alien">Alien</a> and friends need to do searches for dynamic libraries in non-system directories for <code>share</code> installs.</p> </dd> </dl> </dd> <dt id="My-64-bit-Perl-is-misconfigured-and-has-32-bit-libraries-in-its-search-path.-Is-that-a-bug-in-FFI::CheckLib?"><a id="My"></a><a id="My-64-bit-Perl-is-misconfigured-and-has-32-bit-libraries-in-its-search-path.-Is-that-a-bug-in-FFI::CheckLib"></a>My 64-bit Perl is misconfigured and has 32-bit libraries in its search path. Is that a bug in <a href="/pod/FFI::CheckLib">FFI::CheckLib</a>?</dt> <dd> <p>Nope.</p> </dd> <dt id="The-way-FFI::CheckLib-is-implemented-it-won't-work-on-AIX,-HP-UX,-OpenVMS-or-Plan-9."><a id="The"></a><a id="The-way-FFI::CheckLib-is-implemented-it-wont-work-on-AIX-HP-UX-OpenVMS-or-Plan-9"></a>The way <a href="/pod/FFI::CheckLib">FFI::CheckLib</a> is implemented it won't work on AIX, HP-UX, OpenVMS or Plan 9.</dt> <dd> <p>I know for a fact that it doesn't work on AIX <i>as currently implemented</i> because I used to develop on AIX in the early 2000s, and I am aware of some of the technical challenges. There are probably other systems that it won't work on. I would love to add support for these platforms. Realistically these platforms have a tiny market share, and absent patches from users or the companies that own these operating systems (patches welcome), or hardware / CPU time donations, these platforms are unsupportable anyway.</p> </dd> </dl> <h1 id="SEE-ALSO"><a id="SEE"></a>SEE ALSO</h1> <dl> <dt id="FFI::Platypus"><a id="FFI"></a><a href="/pod/FFI::Platypus">FFI::Platypus</a></dt> <dd> <p>Call library functions dynamically without a compiler.</p> </dd> <dt id="Dist::Zilla::Plugin::FFI::CheckLib"><a id="Dist"></a><a href="/pod/Dist::Zilla::Plugin::FFI::CheckLib">Dist::Zilla::Plugin::FFI::CheckLib</a></dt> <dd> <p><a href="/pod/Dist::Zilla">Dist::Zilla</a> plugin for this module.</p> </dd> </dl> <h1 id="AUTHOR">AUTHOR</h1> <p>Author: Graham Ollis <plicease@cpan.org></p> <p>Contributors:</p> <p>Bakkiaraj Murugesan (bakkiaraj)</p> <p>Dan Book (grinnz, DBOOK)</p> <p>Ilya Pavlov (Ilya, ILUX)</p> <p>Shawn Laffan (SLAFFAN)</p> <p>Petr Písař (ppisar)</p> <p>Michael R. Davis (MRDVT)</p> <p>Shawn Laffan (SLAFFAN)</p> <p>Carlos D. Álvaro (cdalvaro)</p> <h1 id="COPYRIGHT-AND-LICENSE"><a id="COPYRIGHT"></a>COPYRIGHT AND LICENSE</h1> <p>This software is copyright (c) 2014-2022 by Graham Ollis.</p> <p>This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.</p></div> <div id="metacpan_install-instructions-dialog" class="modal fade"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button> <h4 class="modal-title">Module Install Instructions</h4> </div> <div class="modal-body"> <p>To install FFI::CheckLib, copy and paste the appropriate command in to your terminal.</p> <p><a href="/dist/App-cpanminus/view/bin/cpanm">cpanm</a></p> <pre><code>cpanm FFI::CheckLib</code></pre> <p><a href="/pod/CPAN">CPAN shell</a></p> <pre><code>perl -MCPAN -e shell install FFI::CheckLib</code></pre> <p>For more information on module installation, please visit <a href="https://www.cpan.org/modules/INSTALL.html">the detailed CPAN module installation guide</a>.</p> </div> <div class="modal-footer"> <a href="#" data-dismiss="modal" class="btn">Close</a> </div> </div> </div> </div> </main> <div class="content-pagination"> </div> </div> <footer class="footer"> <div class="footer-container"> <div class="footer-social"> <div class="footer-link footer-logo"> <a href="/"> <img src="/static/images/metacpan-logo.svg" alt="MetaCPAN" /> </a> </div> <a class="footer-social-link" href="https://github.com/metacpan"> <i class="fab fa-github-square"></i> </a> <a class="footer-social-link" href="https://fosstodon.org/@metacpan"> <i class="fab fa-mastodon"></i> </a> </div> <div class="footer-links"> <div class="footer-link"> <a href="/about">About</a> </div> <div class="footer-link"> <a href="/about/sponsors">Sponsor</a> </div> <div class="footer-link"> <a href="https://grep.metacpan.org">grep::cpan</a> </div> <div class="footer-link"> <a href="/recent">Recent</a> </div> <div class="footer-link"> <a href="/about/faq">FAQ</a> </div> <div class="footer-link"> <a href="/tools">Tools</a> </div> <div class="footer-link"> <a href="https://fastapi.metacpan.org/">API</a> </div> <div class="footer-link"> <a href="https://www.perl.org/">Perl.org</a> </div> </div> <div class="footer-sponsors"> <a class="footer-sponsor-link" target="_blank" href="https://www.bytemark.co.uk/" rel="noopener"> <img class="footer-sponsor-bytemark" src="/static/images/sponsors/bytemark_logo.svg" alt="Bytemark logo"> </a> <a class="footer-sponsor-link" target="_blank" href="https://www.liquidweb.com/" rel="noopener"> <img class="footer-sponsor-liquidweb" src="/static/images/sponsors/liquidweb_logo.png" alt="liquidweb logo"> </a> <a class="footer-sponsor-link" target="_blank" href="https://deriv.com/careers/" rel="noopener"> <img class="footer-sponsor-deriv" src="/static/images/sponsors/deriv.svg" alt="Deriv logo"> </a> <a class="footer-sponsor-link" target="_blank" href="https://geocode.xyz" rel="noopener"> <img class="footer-sponsor-geocode" src="/static/images/sponsors/geocodelogo.svg" alt="Geocode logo"> </a> <a class="footer-sponsor-link" target="_blank" href="https://www.fastly.com/" rel="noopener"> <img class="footer-sponsor-fastly" src="/static/images/sponsors/fastly_logo.svg" alt="Fastly logo"> </a> <a class="footer-sponsor-link" target="_blank" href="https://opencagedata.com" rel="noopener"> <img class="footer-sponsor-opencage" src="/static/images/sponsors/open-cage.svg" alt="OpenCage logo"> </a>  <a class="footer-sponsor-link" target="_blank" href="https://www.elastic.co/" rel="noopener"> <img class="footer-sponsor-elastic" src="/static/images/sponsors/elastic.svg" alt="Elastic logo"> </a>  <a class="footer-sponsor-link" target="_blank" href="https://route4me.com/" rel="noopener"> <img class="footer-sponsor-route4me" src="/static/images/sponsors/route4me.png" alt="Route4Me logo"> </a> </div> </div> </footer> <div class="modal fade" tabindex="-1" role="dialog" id="metacpan_keyboard-shortcuts"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal">×</button> <h4 class="modal-title">Keyboard Shortcuts</h4> </div> <div class="modal-body row"> <div class="col-md-6"> <table class="table keyboard-shortcuts"> <thead> <tr> <th></th> <th>Global</th> </tr> </thead> <tbody> <tr> <td class="keys"> <kbd>s</kbd> </td> <td>Focus search bar</td> </tr> <tr> <td class="keys"> <kbd>?</kbd> </td> <td>Bring up this help dialog</td> </tr> </tbody> </table> <table class="table keyboard-shortcuts"> <thead> <tr> <th></th> <th>GitHub</th> </tr> </thead> <tbody> <tr> <td class="keys"> <kbd>g</kbd> <kbd>p</kbd> </td> <td>Go to pull requests</td> </tr> <tr> <td class="keys"> <kbd>g</kbd> <kbd>i</kbd> </td> <td>go to github issues (only if github is preferred repository)</td> </tr> </tbody> </table> </div> <div class="col-md-6"> <table class="table keyboard-shortcuts"> <thead> <tr> <th></th> <th>POD</th> </tr> </thead> <tbody> <tr> <td class="keys"> <kbd>g</kbd> <kbd>a</kbd> </td> <td>Go to author</td> </tr> <tr> <td class="keys"> <kbd>g</kbd> <kbd>c</kbd> </td> <td>Go to changes</td> </tr> <tr> <td class="keys"> <kbd>g</kbd> <kbd>i</kbd> </td> <td>Go to issues</td> </tr> <tr> <td class="keys"> <kbd>g</kbd> <kbd>d</kbd> </td> <td>Go to dist</td> </tr> <tr> <td class="keys"> <kbd>g</kbd> <kbd>r</kbd> </td> <td>Go to repository/SCM</td> </tr> <tr> <td class="keys"> <kbd>g</kbd> <kbd>s</kbd> </td> <td>Go to source</td> </tr> <tr> <td class="keys"> <kbd>g</kbd> <kbd>b</kbd> </td> <td>Go to file browse</td> </tr> </tbody> </table> </div> <div class="col-md-12"> <table class="table keyboard-shortcuts"> <thead> <tr> <th></th> <th>Search terms</th> </tr> </thead> <tbody> <tr> <td><em>module:</em> (e.g. <a href="/search?q=module%3APlugin">module:Plugin</a>)</td> </tr> <tr> <td><em>distribution:</em> (e.g. <a href="/search?q=distribution%3ADancer+auth">distribution:Dancer auth</a>)</td> </tr> <tr> <td><em>author:</em> (e.g. <a href="/search?q=author%3ASONGMU+Redis">author:SONGMU Redis</a>)</td> </tr> <tr> <td><em>version:</em> (e.g. <a href="/search?q=version%3A1.00">version:1.00</a>)</td> </tr> </tbody> </table> </div> </div> <div class="modal-footer"></div> </div> </div> </div> </body> </html>

CINXE.COM

FFI::CheckLib - Check that a library is available for FFI - metacpan.org