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<ol class="chapter"><li class="chapter-item expanded "><a href="../../Introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li class="chapter-item expanded "><a href="../../manual/Installing.html"><strong aria-hidden="true">2.</strong> Installing</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../manual/Installing/Packages.html"><strong aria-hidden="true">2.1.</strong> Packages</a></li><li class="chapter-item expanded "><a href="../../manual/Installing/Docker.html"><strong aria-hidden="true">2.2.</strong> Docker</a></li><li class="chapter-item expanded "><a href="../../manual/Installing/Installing-from-source-Unix.html"><strong aria-hidden="true">2.3.</strong> Unix from source (v0.104+)</a></li><li class="chapter-item expanded "><a href="../../manual/Installing/Installing-from-source-Unix-old.html" class="active"><strong aria-hidden="true">2.4.</strong> Unix from source (v0.103-)</a></li><li class="chapter-item expanded "><a href="../../manual/Installing/Installing-from-source-Windows.html"><strong aria-hidden="true">2.5.</strong> Windows from source</a></li><li class="chapter-item expanded "><a href="../../manual/Installing/Community-projects.html"><strong aria-hidden="true">2.6.</strong> Community Projects</a></li><li class="chapter-item expanded "><a href="../../manual/Installing/Add-clamav-user.html"><strong aria-hidden="true">2.7.</strong> Add a service user account</a></li></ol></li><li class="chapter-item expanded "><a href="../../manual/Usage.html"><strong aria-hidden="true">3.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../manual/Usage/Configuration.html"><strong aria-hidden="true">3.1.</strong> Configuration</a></li><li class="chapter-item expanded "><a href="../../manual/Usage/SignatureManagement.html"><strong aria-hidden="true">3.2.</strong> Updating Signature Databases</a></li><li class="chapter-item expanded "><a href="../../manual/Usage/Scanning.html"><strong aria-hidden="true">3.3.</strong> Scanning</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../manual/OnAccess.html"><strong aria-hidden="true">3.3.1.</strong> On-Access Scanning</a></li></ol></li><li class="chapter-item expanded "><a href="../../manual/Usage/Services.html"><strong aria-hidden="true">3.4.</strong> Running ClamAV Services</a></li><li class="chapter-item expanded "><a href="../../manual/Usage/ReportABug.html"><strong aria-hidden="true">3.5.</strong> Report a Bug</a></li></ol></li><li class="chapter-item expanded "><a href="../../manual/Signatures.html"><strong aria-hidden="true">4.</strong> Signatures</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../manual/Signatures/DatabaseInfo.html"><strong aria-hidden="true">4.1.</strong> CVD Info File</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/DynamicConfig.html"><strong aria-hidden="true">4.2.</strong> Dynamic Configuration Settings</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/AuthenticodeRules.html"><strong aria-hidden="true">4.3.</strong> Trusted and Revoked EXE Certificates</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/FileTypeMagic.html"><strong aria-hidden="true">4.4.</strong> File Type Recognition</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/AllowLists.html"><strong aria-hidden="true">4.5.</strong> Allow Lists</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/HashSignatures.html"><strong aria-hidden="true">4.6.</strong> Hash-based Signatures</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/BodySignatureFormat.html"><strong aria-hidden="true">4.7.</strong> Content-based Signature Format</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../manual/Signatures/LogicalSignatures.html"><strong aria-hidden="true">4.7.1.</strong> Logical Signatures</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/ExtendedSignatures.html"><strong aria-hidden="true">4.7.2.</strong> Extended Signatures</a></li></ol></li><li class="chapter-item expanded "><a href="../../manual/Signatures/YaraRules.html"><strong aria-hidden="true">4.8.</strong> YARA Rules</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/PhishSigs.html"><strong aria-hidden="true">4.9.</strong> Phishing Signatures</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/BytecodeSignatures.html"><strong aria-hidden="true">4.10.</strong> Bytecode Signatures</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/ContainerMetadata.html"><strong aria-hidden="true">4.11.</strong> Container Metadata Signatures</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/EncryptedArchives.html"><strong aria-hidden="true">4.12.</strong> Archive Passwords (experimental)</a></li><li class="chapter-item expanded "><a href="../../manual/Signatures/SignatureNames.html"><strong aria-hidden="true">4.13.</strong> Signature Names</a></li></ol></li><li class="chapter-item expanded "><a href="../../manual/Development.html"><strong aria-hidden="true">5.</strong> For Developers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../manual/Development/github-pr-basics.html"><strong aria-hidden="true">5.1.</strong> Pull Request Basics</a></li><li class="chapter-item expanded "><a href="../../manual/Development/clamav-git-work-flow.html"><strong aria-hidden="true">5.2.</strong> ClamAV Git Work Flow</a></li><li class="chapter-item expanded "><a href="../../manual/Development/personal-forks.html"><strong aria-hidden="true">5.3.</strong> Working with Your Fork</a></li><li class="chapter-item expanded "><a href="../../manual/Development/testing-pull-requests.html"><strong aria-hidden="true">5.4.</strong> Reviewing Pull Requests</a></li><li class="chapter-item expanded "><a href="../../manual/Development/development-builds.html"><strong aria-hidden="true">5.5.</strong> Building for Development</a></li><li class="chapter-item expanded "><a href="../../manual/Development/build-installer-packages.html"><strong aria-hidden="true">5.6.</strong> Building the Installer Packages</a></li><li class="chapter-item expanded "><a href="../../manual/Development/tips-and-tricks.html"><strong aria-hidden="true">5.7.</strong> Dev Tips & Tricks</a></li><li class="chapter-item expanded "><a href="../../manual/Development/performance-profiling.html"><strong aria-hidden="true">5.8.</strong> Performance Profiling</a></li><li class="chapter-item expanded "><a href="../../manual/Development/code-coverage.html"><strong aria-hidden="true">5.9.</strong> Computing Code Coverage</a></li><li class="chapter-item expanded "><a href="../../manual/Development/fuzzing-sanitizers.html"><strong aria-hidden="true">5.10.</strong> Fuzzing Sanitizers</a></li><li class="chapter-item expanded "><a href="../../manual/Development/libclamav.html"><strong aria-hidden="true">5.11.</strong> libclamav</a></li><li class="chapter-item expanded "><a href="../../manual/Development/Contribute.html"><strong aria-hidden="true">5.12.</strong> Contribute</a></li></ol></li><li class="chapter-item expanded "><a href="../../faq/faq.html"><strong aria-hidden="true">6.</strong> Frequently Asked Questions</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../faq/faq-whichversion.html"><strong aria-hidden="true">6.1.</strong> Selecting the Right Version of ClamAV for You</a></li><li class="chapter-item expanded "><a href="../../faq/faq-freshclam.html"><strong aria-hidden="true">6.2.</strong> FreshClam (Signature Updater)</a></li><li class="chapter-item expanded "><a href="../../faq/faq-cvd.html"><strong aria-hidden="true">6.3.</strong> Signature Database (CVD)</a></li><li class="chapter-item expanded "><a href="../../faq/faq-misc.html"><strong aria-hidden="true">6.4.</strong> Misc</a></li><li class="chapter-item expanded "><a href="../../faq/faq-ml.html"><strong aria-hidden="true">6.5.</strong> Mailing Lists</a></li><li class="chapter-item expanded "><a href="../../faq/faq-safebrowsing.html"><strong aria-hidden="true">6.6.</strong> Safe Browsing</a></li><li class="chapter-item expanded "><a href="../../faq/faq-troubleshoot.html"><strong aria-hidden="true">6.7.</strong> Troubleshooting</a></li><li class="chapter-item expanded "><a href="../../faq/faq-scan-alerts.html"><strong aria-hidden="true">6.8.</strong> Interpreting Scan Alerts</a></li><li class="chapter-item expanded "><a href="../../faq/faq-upgrade.html"><strong aria-hidden="true">6.9.</strong> Upgrading</a></li><li class="chapter-item expanded "><a href="../../faq/faq-rust.html"><strong aria-hidden="true">6.10.</strong> Rust</a></li><li class="chapter-item expanded "><a href="../../faq/faq-win32.html"><strong aria-hidden="true">6.11.</strong> Win32</a></li><li class="chapter-item expanded "><a href="../../faq/faq-pua.html"><strong aria-hidden="true">6.12.</strong> PUA (Potentially Unwanted Application)</a></li><li class="chapter-item expanded "><a href="../../faq/faq-ignore.html"><strong aria-hidden="true">6.13.</strong> Ignore</a></li><li class="chapter-item expanded "><a href="../../faq/faq-uninstall.html"><strong aria-hidden="true">6.14.</strong> Uninstall</a></li><li class="chapter-item expanded "><a href="../../faq/faq-eol.html"><strong aria-hidden="true">6.15.</strong> ClamAV EOL Policy</a></li><li class="spacer"></li></ol></li><li class="chapter-item expanded "><a href="../../community_resources/CommunityResources.html"><strong aria-hidden="true">7.</strong> Community Resources</a></li><li class="spacer"></li><li class="chapter-item expanded "><a href="../../appendix/Appendix.html"><strong aria-hidden="true">8.</strong> Appendix</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../appendix/Terminology.html"><strong aria-hidden="true">8.1.</strong> Terminology</a></li><li class="chapter-item expanded "><a href="../../appendix/CvdPrivateMirror.html"><strong aria-hidden="true">8.2.</strong> Hosting a Private Database Mirror</a></li><li class="chapter-item expanded "><a href="../../appendix/Authenticode.html"><strong aria-hidden="true">8.3.</strong> Microsoft Authenticode Signature Verification</a></li><li class="chapter-item expanded "><a href="../../appendix/FileTypes.html"><strong aria-hidden="true">8.4.</strong> ClamAV File Types and Target Types</a></li><li class="chapter-item expanded "><a href="../../appendix/FunctionalityLevels.html"><strong aria-hidden="true">8.5.</strong> ClamAV Versions and Functionality Levels</a></li></ol></li></ol>
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<h1 class="menu-title">ClamAV Documentation</h1>
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<h1 id="building-clamav-with-autotools-v0103-and-older"><a class="header" href="#building-clamav-with-autotools-v0103-and-older">Building ClamAV with Autotools (v0.103 and older)</a></h1>
<p>The following are instructions to build ClamAV <em>version 0.103 and older</em> using Autotools.</p>
<ul>
<li><a href="#building-clamav-with-autotools-v0103-and-older">Building ClamAV with Autotools (v0.103 and older)</a>
<ul>
<li><a href="#install-prerequisites">Install prerequisites</a>
<ul>
<li><a href="#alpine">Alpine</a></li>
<li><a href="#redhat--centos--fedora">Redhat / Centos / Fedora</a></li>
<li><a href="#ubuntu--debian">Ubuntu / Debian</a></li>
<li><a href="#macos">macOS</a></li>
<li><a href="#freebsd">FreeBSD</a></li>
</ul>
</li>
<li><a href="#adding-new-system-user-and-group">Adding new system user and group</a></li>
<li><a href="#download-the-source-code">Download the source code</a></li>
<li><a href="#build-clamav">Build ClamAV</a>
<ul>
<li><a href="#the-default-build">The Default Build</a></li>
<li><a href="#a-linux-distribution-style-build">A Linux Distribution-style Build</a></li>
<li><a href="#a-build-for-development">A Build for Development</a></li>
<li><a href="#about-the-tests">About the tests</a></li>
</ul>
</li>
<li><a href="#un-install">Un-install</a></li>
<li><a href="#what-now">What now?</a></li>
</ul>
</li>
</ul>
<blockquote>
<p><em>Note</em>: Some of the dependencies are optional if you elect to not build all of the command line applications, or elect to only build the libclamav library. Specifically:</p>
<ul>
<li>libcurl: <em>required for libfreshclam, freshclam, clamsubmit, clamonacc</em></li>
<li>json-c: <em>required for clamsubmit, optional for libclamav</em></li>
<li>ncurses: <em>required for clamdtop</em></li>
</ul>
</blockquote>
<h2 id="install-prerequisites"><a class="header" href="#install-prerequisites">Install prerequisites</a></h2>
<h3 id="alpine"><a class="header" href="#alpine">Alpine</a></h3>
<p>As root or with <code>sudo</code>, run:</p>
<pre><code class="language-sh">apk update && apk add \
`# install tools` \
g++ gcc gdb make valgrind \
`# install clamav dependencies` \
bzip2-dev check-dev curl-dev json-c-dev libmilter-dev libxml2-dev \
linux-headers ncurses-dev openssl-dev pcre2-dev zlib-dev
</code></pre>
<h3 id="redhat--centos--fedora"><a class="header" href="#redhat--centos--fedora">Redhat / Centos / Fedora</a></h3>
<p><em>For Centos 8</em>, you will probably need to run this to enable EPEL & PowerTools.
As root or with <code>sudo</code>, run:</p>
<pre><code class="language-sh">dnf install -y epel-release
dnf install -y dnf-plugins-core
dnf install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
dnf config-manager --set-enabled PowerTools | \
dnf config-manager --set-enabled powertools | true
</code></pre>
<p>As root or with <code>sudo</code>, run:</p>
<pre><code class="language-sh">dnf install -y \
`# install tools` \
gcc gcc-c++ make valgrind \
`# install clamav dependencies` \
bzip2-devel check-devel json-c-devel libcurl-devel libxml2-devel \
ncurses-devel openssl-devel pcre2-devel sendmail-devel zlib-devel
</code></pre>
<blockquote>
<p><em>Note</em>: If you get <code>dnf: command not found</code>, use <code>yum</code> instead.</p>
</blockquote>
<blockquote>
<p><em>Tip</em>: You need to run <code>autogen.sh</code> if you're not building from a release tarball from clamav.net. If so, visit the <a href="../Development/development-builds.html#redhat--centos--fedora">developer section</a> to find out what packages are required to run <code>autogen.sh</code></p>
</blockquote>
<h3 id="ubuntu--debian"><a class="header" href="#ubuntu--debian">Ubuntu / Debian</a></h3>
<p>As root or with <code>sudo</code>, run:</p>
<pre><code class="language-sh">apt-get update && apt-get install -y \
`# install tools` \
gcc make pkg-config valgrind \
`# install clamav dependencies` \
check libbz2-dev libcurl4-openssl-dev libjson-c-dev libmilter-dev \
libncurses5-dev libpcre2-dev libssl-dev libxml2-dev zlib1g-dev
</code></pre>
<blockquote>
<p><em>Tip</em>: You need to run <code>autogen.sh</code> if you're not building from a release tarball from clamav.net. If so, visit the <a href="../Development/development-builds.html#debian--ubuntu">developer section</a> to find out what packages are required to run <code>autogen.sh</code></p>
</blockquote>
<h3 id="macos"><a class="header" href="#macos">macOS</a></h3>
<p>The following instructions require you to install <a href="https://brew.sh/">HomeBrew</a> to install tools and library dependencies.</p>
<pre><code class="language-sh"># Install XCode's Command Line Tools
xcode-select --install
brew update
packages=(
# install tools
autoconf automake m4
# install clamav dependencies
bzip2 check curl-openssl json-c libxml2 ncurses openssl@1.1 pcre2 zlib
)
for item in "${packages[@]}"; do
brew install $item || true; brew upgrade $item || brew upgrade $item
done
</code></pre>
<h3 id="freebsd"><a class="header" href="#freebsd">FreeBSD</a></h3>
<p>As root or with <code>sudo</code>, run:</p>
<pre><code class="language-sh">pkg install -y \
`# install tools` \
gmake pkgconf \
`# install clamav dependencies` \
bzip2 check curl json-c libmilter libxml2 ncurses pcre2
</code></pre>
<h2 id="adding-new-system-user-and-group"><a class="header" href="#adding-new-system-user-and-group">Adding new system user and group</a></h2>
<p>If installing to the system, and if you intend to run <code>freshclam</code> or <code>clamd</code> as as service, you should create a service account before compiling and installing ClamAV.</p>
<p><a href="Add-clamav-user.html">Follow these steps to create a service account</a>.</p>
<h2 id="download-the-source-code"><a class="header" href="#download-the-source-code">Download the source code</a></h2>
<p>Download the source from <a href="https://www.clamav.net/downloads">the clamav.net downloads page</a>.</p>
<p>Extract the archive:</p>
<pre><code class="language-bash">tar xzf clamav-[ver].tar.gz
cd clamav-[ver]
</code></pre>
<h2 id="build-clamav"><a class="header" href="#build-clamav">Build ClamAV</a></h2>
<p>First, make a "build" subdirectory. This will enable you to easily delete your build files if something goes wrong and you need to re-configure and try again.</p>
<pre><code class="language-bash">mkdir build && cd build
</code></pre>
<blockquote>
<p><em>Note</em>: The instructions in this page assume you're building from our source <code>clamav-[ver].tar.gz</code> file. <strong>If you aren't</strong>, you may need to install extra build tools (autoconf, automake, m4, libtool, and pkg-config/pkgconfig/pkgconf) then run:</p>
<pre><code class="language-bash">../autogen.sh
</code></pre>
</blockquote>
<p>Next, select the build options you desire. For a full list of configuration options, run:</p>
<pre><code class="language-bash">../configure --help
</code></pre>
<p>To help you get started, here are some popular build configurations.</p>
<h3 id="the-default-build"><a class="header" href="#the-default-build">The Default Build</a></h3>
<p>The default build type is "RelWithDebInfo", that is "Release mode with Debugging symbols". It will install to <code>/usr/local</code>.</p>
<pre><code class="language-bash">../configure
make
make check VG=1
sudo make install
</code></pre>
<h3 id="a-linux-distribution-style-build"><a class="header" href="#a-linux-distribution-style-build">A Linux Distribution-style Build</a></h3>
<p>This build type mimics the layout you may be familiar with if installing a ClamAV package on Debian, Ubuntu, Alpine, and some other distributions. This will be a "release build" (no debugging symbols, optimizations enabled) and will install to <code>/usr</code>. The config directory will be <code>/etc/clamav</code> and the database directory will be <code>/var/lib/clamav</code>.</p>
<pre><code class="language-bash">../configure \
--prefix=/usr
--sysconfdir=/etc/clamav \
--with-dbdir=/var/lib/clamav \
--with-libjson-static=/path/to/libjson-c.a \
--enable-milter
make
make check VG=1
sudo make install
</code></pre>
<blockquote>
<p><em>Note</em>: Setting <code>ENABLE_JSON_SHARED=OFF</code> is preferred, but it will require json-c version 0.15 or newer. If json-c 0.15+ is not available to you, you may omit the option and just use the json-c shared library. But be warned that downstream applications which use <code>libclamav.so</code> may crash if they also use a different JSON library.</p>
</blockquote>
<h3 id="a-build-for-development"><a class="header" href="#a-build-for-development">A Build for Development</a></h3>
<p>With the following commands, ClamAV will be compiled with debugging symbols and with optimizations disabled. It will install to an "install" subdirectory and SystemD integration is disabled so that <code>sudo</code> is not required for the install and SystemD unit files are not installed to the system.</p>
<pre><code class="language-bash">CFLAGS="-Wall -Wextra -ggdb -O0" CXXFLAGS="-Wall -Wextra -ggdb -O0" ../configure \
--prefix=`pwd`/install \
--with-systemdsystemunitdir=no
make -j12
make check VG=1
sudo make install
</code></pre>
<h3 id="about-the-tests"><a class="header" href="#about-the-tests">About the tests</a></h3>
<p>ClamAV's public test suite is run using <code>make check</code>. On Linux systems, the <code>VG=1</code> argument will enable extra tests that use Valgrind to check for leaks.</p>
<p>If a test fails, please <a href="https://github.com/Cisco-Talos/clamav/issues">report the issue on GitHub</a>. You will find <code>.log</code> files generated by the tests in the <code>build/unit_tests</code> directory. The output from <code>make check VG=1</code> may give us enough information, but if not it could be helpful to zip up the <code>.log</code> files and attach them to the ticket.</p>
<h2 id="un-install"><a class="header" href="#un-install">Un-install</a></h2>
<p>Run <code>make uninstall</code> to remove the installed files.</p>
<p>This will leave behind the directories, and will leave behind any files added after install including the signature databases and any config files. You will have to delete these extra files yourself.</p>
<blockquote>
<p><em>Tip</em>: You may need to use <code>sudo</code>, depending on where you installed to.</p>
</blockquote>
<h2 id="what-now"><a class="header" href="#what-now">What now?</a></h2>
<p>Now that ClamAV is installed, you will want to customize your configuration and perhaps set up some scanning automation and alerting mechanisms.</p>
<p><a href="../Usage/Configuration.html">Continue on to "Configuration"...</a></p>
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