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<section id="target-link-options">
<span id="command:target_link_options"></span><h1>target_link_options<a class="headerlink" href="#target-link-options" title="Permalink to this heading">¶</a></h1>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.13.</span></p>
</div>
<p>Add options to the link step for an executable, shared library or module
library target.</p>
<div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">target_link_options(</span><span class="nv"><target></span><span class="w"> </span><span class="p">[</span><span class="no">BEFORE</span><span class="p">]</span><span class="w"></span>
<span class="w"> </span><span class="o"><</span><span class="no">INTERFACE</span><span class="p">|</span><span class="no">PUBLIC</span><span class="p">|</span><span class="no">PRIVATE</span><span class="o">></span><span class="w"> </span><span class="p">[</span><span class="nb">items1...</span><span class="p">]</span><span class="w"></span>
<span class="w"> </span><span class="p">[</span><span class="o"><</span><span class="no">INTERFACE</span><span class="p">|</span><span class="no">PUBLIC</span><span class="p">|</span><span class="no">PRIVATE</span><span class="o">></span><span class="w"> </span><span class="p">[</span><span class="nb">items2...</span><span class="p">]</span><span class="w"> </span><span class="p">...]</span><span class="nf">)</span><span class="w"></span>
</pre></div>
</div>
<p>The named <code class="docutils literal notranslate"><span class="pre"><target></span></code> must have been created by a command such as
<span class="target" id="index-0-command:add_executable"></span><a class="reference internal" href="add_executable.html#command:add_executable" title="add_executable"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_executable()</span></code></a> or <span class="target" id="index-0-command:add_library"></span><a class="reference internal" href="add_library.html#command:add_library" title="add_library"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_library()</span></code></a> and must not be an
<a class="reference internal" href="../manual/cmake-buildsystem.7.html#alias-targets"><span class="std std-ref">ALIAS target</span></a>.</p>
<p>This command can be used to add any link options, but alternative commands
exist to add libraries (<span class="target" id="index-0-command:target_link_libraries"></span><a class="reference internal" href="target_link_libraries.html#command:target_link_libraries" title="target_link_libraries"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_link_libraries()</span></code></a> or
<span class="target" id="index-0-command:link_libraries"></span><a class="reference internal" href="link_libraries.html#command:link_libraries" title="link_libraries"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">link_libraries()</span></code></a>). See documentation of the
<span class="target" id="index-0-prop_dir:LINK_OPTIONS"></span><a class="reference internal" href="../prop_dir/LINK_OPTIONS.html#prop_dir:LINK_OPTIONS" title="LINK_OPTIONS"><code class="xref cmake cmake-prop_dir docutils literal notranslate"><span class="pre">directory</span></code></a> and
<span class="target" id="index-0-prop_tgt:LINK_OPTIONS"></span><a class="reference internal" href="../prop_tgt/LINK_OPTIONS.html#prop_tgt:LINK_OPTIONS" title="LINK_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">target</span></code></a> <code class="docutils literal notranslate"><span class="pre">LINK_OPTIONS</span></code> properties.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>This command cannot be used to add options for static library targets,
since they do not use a linker. To add archiver or MSVC librarian flags,
see the <span class="target" id="index-0-prop_tgt:STATIC_LIBRARY_OPTIONS"></span><a class="reference internal" href="../prop_tgt/STATIC_LIBRARY_OPTIONS.html#prop_tgt:STATIC_LIBRARY_OPTIONS" title="STATIC_LIBRARY_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">STATIC_LIBRARY_OPTIONS</span></code></a> target property.</p>
</div>
<p>If <code class="docutils literal notranslate"><span class="pre">BEFORE</span></code> is specified, the content will be prepended to the property
instead of being appended.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">INTERFACE</span></code>, <code class="docutils literal notranslate"><span class="pre">PUBLIC</span></code> and <code class="docutils literal notranslate"><span class="pre">PRIVATE</span></code> keywords are required to
specify the <a class="reference internal" href="../manual/cmake-buildsystem.7.html#target-usage-requirements"><span class="std std-ref">scope</span></a> of the following arguments.
<code class="docutils literal notranslate"><span class="pre">PRIVATE</span></code> and <code class="docutils literal notranslate"><span class="pre">PUBLIC</span></code> items will populate the <span class="target" id="index-1-prop_tgt:LINK_OPTIONS"></span><a class="reference internal" href="../prop_tgt/LINK_OPTIONS.html#prop_tgt:LINK_OPTIONS" title="LINK_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">LINK_OPTIONS</span></code></a>
property of <code class="docutils literal notranslate"><span class="pre"><target></span></code>. <code class="docutils literal notranslate"><span class="pre">PUBLIC</span></code> and <code class="docutils literal notranslate"><span class="pre">INTERFACE</span></code> items will populate the
<span class="target" id="index-0-prop_tgt:INTERFACE_LINK_OPTIONS"></span><a class="reference internal" href="../prop_tgt/INTERFACE_LINK_OPTIONS.html#prop_tgt:INTERFACE_LINK_OPTIONS" title="INTERFACE_LINK_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">INTERFACE_LINK_OPTIONS</span></code></a> property of <code class="docutils literal notranslate"><span class="pre"><target></span></code>.
The following arguments specify link options. Repeated calls for the same
<code class="docutils literal notranslate"><span class="pre"><target></span></code> append items in the order called.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p><a class="reference internal" href="../manual/cmake-buildsystem.7.html#imported-targets"><span class="std std-ref">IMPORTED targets</span></a> only support <code class="docutils literal notranslate"><span class="pre">INTERFACE</span></code> items.</p>
</div>
<p>Arguments to <code class="docutils literal notranslate"><span class="pre">target_link_options</span></code> may use generator expressions
with the syntax <code class="docutils literal notranslate"><span class="pre">$<...></span></code>. See the <span class="target" id="index-0-manual:cmake-generator-expressions(7)"></span><a class="reference internal" href="../manual/cmake-generator-expressions.7.html#manual:cmake-generator-expressions(7)" title="cmake-generator-expressions(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">cmake-generator-expressions(7)</span></code></a>
manual for available expressions. See the <span class="target" id="index-1-manual:cmake-buildsystem(7)"></span><a class="reference internal" href="../manual/cmake-buildsystem.7.html#manual:cmake-buildsystem(7)" title="cmake-buildsystem(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">cmake-buildsystem(7)</span></code></a> manual
for more on defining buildsystem properties.</p>
<section id="host-and-device-specific-link-options">
<h2>Host And Device Specific Link Options<a class="headerlink" href="#host-and-device-specific-link-options" title="Permalink to this heading">¶</a></h2>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.18: </span>When a device link step is involved, which is controlled by
<span class="target" id="index-0-prop_tgt:CUDA_SEPARABLE_COMPILATION"></span><a class="reference internal" href="../prop_tgt/CUDA_SEPARABLE_COMPILATION.html#prop_tgt:CUDA_SEPARABLE_COMPILATION" title="CUDA_SEPARABLE_COMPILATION"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">CUDA_SEPARABLE_COMPILATION</span></code></a> and
<span class="target" id="index-0-prop_tgt:CUDA_RESOLVE_DEVICE_SYMBOLS"></span><a class="reference internal" href="../prop_tgt/CUDA_RESOLVE_DEVICE_SYMBOLS.html#prop_tgt:CUDA_RESOLVE_DEVICE_SYMBOLS" title="CUDA_RESOLVE_DEVICE_SYMBOLS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">CUDA_RESOLVE_DEVICE_SYMBOLS</span></code></a> properties and policy <span class="target" id="index-0-policy:CMP0105"></span><a class="reference internal" href="../policy/CMP0105.html#policy:CMP0105" title="CMP0105"><code class="xref cmake cmake-policy docutils literal notranslate"><span class="pre">CMP0105</span></code></a>,
the raw options will be delivered to the host and device link steps (wrapped in
<code class="docutils literal notranslate"><span class="pre">-Xcompiler</span></code> or equivalent for device link). Options wrapped with
<span class="target" id="index-0-genex:DEVICE_LINK"></span><a class="reference internal" href="../manual/cmake-generator-expressions.7.html#genex:DEVICE_LINK" title="DEVICE_LINK"><code class="xref cmake cmake-genex docutils literal notranslate"><span class="pre">$<DEVICE_LINK:...></span></code></a> generator expression will be used
only for the device link step. Options wrapped with <span class="target" id="index-0-genex:HOST_LINK"></span><a class="reference internal" href="../manual/cmake-generator-expressions.7.html#genex:HOST_LINK" title="HOST_LINK"><code class="xref cmake cmake-genex docutils literal notranslate"><span class="pre">$<HOST_LINK:...></span></code></a>
generator expression will be used only for the host link step.</p>
</div>
</section>
<section id="option-de-duplication">
<h2>Option De-duplication<a class="headerlink" href="#option-de-duplication" title="Permalink to this heading">¶</a></h2>
<p>The final set of options used for a target is constructed by
accumulating options from the current target and the usage requirements of
its dependencies. The set of options is de-duplicated to avoid repetition.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.12: </span>While beneficial for individual options, the de-duplication step can break
up option groups. For example, <code class="docutils literal notranslate"><span class="pre">-option</span> <span class="pre">A</span> <span class="pre">-option</span> <span class="pre">B</span></code> becomes
<code class="docutils literal notranslate"><span class="pre">-option</span> <span class="pre">A</span> <span class="pre">B</span></code>. One may specify a group of options using shell-like
quoting along with a <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code> prefix. The <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code> prefix is dropped,
and the rest of the option string is parsed using the
<span class="target" id="index-0-command:separate_arguments"></span><a class="reference internal" href="separate_arguments.html#command:separate_arguments" title="separate_arguments"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">separate_arguments()</span></code></a> <code class="docutils literal notranslate"><span class="pre">UNIX_COMMAND</span></code> mode. For example,
<code class="docutils literal notranslate"><span class="pre">"SHELL:-option</span> <span class="pre">A"</span> <span class="pre">"SHELL:-option</span> <span class="pre">B"</span></code> becomes <code class="docutils literal notranslate"><span class="pre">-option</span> <span class="pre">A</span> <span class="pre">-option</span> <span class="pre">B</span></code>.</p>
</div>
</section>
<section id="handling-compiler-driver-differences">
<h2>Handling Compiler Driver Differences<a class="headerlink" href="#handling-compiler-driver-differences" title="Permalink to this heading">¶</a></h2>
<p>To pass options to the linker tool, each compiler driver has its own syntax.
The <code class="docutils literal notranslate"><span class="pre">LINKER:</span></code> prefix and <code class="docutils literal notranslate"><span class="pre">,</span></code> separator can be used to specify, in a portable
way, options to pass to the linker tool. <code class="docutils literal notranslate"><span class="pre">LINKER:</span></code> is replaced by the
appropriate driver option and <code class="docutils literal notranslate"><span class="pre">,</span></code> by the appropriate driver separator.
The driver prefix and driver separator are given by the values of the
<span class="target" id="index-0-variable:CMAKE_<LANG>_LINKER_WRAPPER_FLAG"></span><a class="reference internal" href="../variable/CMAKE_LANG_LINKER_WRAPPER_FLAG.html#variable:CMAKE_<LANG>_LINKER_WRAPPER_FLAG" title="CMAKE_<LANG>_LINKER_WRAPPER_FLAG"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_<LANG>_LINKER_WRAPPER_FLAG</span></code></a> and
<span class="target" id="index-0-variable:CMAKE_<LANG>_LINKER_WRAPPER_FLAG_SEP"></span><a class="reference internal" href="../variable/CMAKE_LANG_LINKER_WRAPPER_FLAG_SEP.html#variable:CMAKE_<LANG>_LINKER_WRAPPER_FLAG_SEP" title="CMAKE_<LANG>_LINKER_WRAPPER_FLAG_SEP"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_<LANG>_LINKER_WRAPPER_FLAG_SEP</span></code></a> variables.</p>
<p>For example, <code class="docutils literal notranslate"><span class="pre">"LINKER:-z,defs"</span></code> becomes <code class="docutils literal notranslate"><span class="pre">-Xlinker</span> <span class="pre">-z</span> <span class="pre">-Xlinker</span> <span class="pre">defs</span></code> for
<code class="docutils literal notranslate"><span class="pre">Clang</span></code> and <code class="docutils literal notranslate"><span class="pre">-Wl,-z,defs</span></code> for <code class="docutils literal notranslate"><span class="pre">GNU</span> <span class="pre">GCC</span></code>.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">LINKER:</span></code> prefix can be specified as part of a <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code> prefix
expression.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">LINKER:</span></code> prefix supports, as an alternative syntax, specification of
arguments using the <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code> prefix and space as separator. The previous
example then becomes <code class="docutils literal notranslate"><span class="pre">"LINKER:SHELL:-z</span> <span class="pre">defs"</span></code>.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Specifying the <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code> prefix anywhere other than at the beginning of the
<code class="docutils literal notranslate"><span class="pre">LINKER:</span></code> prefix is not supported.</p>
</div>
</section>
<section id="see-also">
<h2>See Also<a class="headerlink" href="#see-also" title="Permalink to this heading">¶</a></h2>
<ul class="simple">
<li><p><span class="target" id="index-0-command:target_compile_definitions"></span><a class="reference internal" href="target_compile_definitions.html#command:target_compile_definitions" title="target_compile_definitions"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_compile_definitions()</span></code></a></p></li>
<li><p><span class="target" id="index-0-command:target_compile_features"></span><a class="reference internal" href="target_compile_features.html#command:target_compile_features" title="target_compile_features"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_compile_features()</span></code></a></p></li>
<li><p><span class="target" id="index-0-command:target_compile_options"></span><a class="reference internal" href="target_compile_options.html#command:target_compile_options" title="target_compile_options"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_compile_options()</span></code></a></p></li>
<li><p><span class="target" id="index-0-command:target_include_directories"></span><a class="reference internal" href="target_include_directories.html#command:target_include_directories" title="target_include_directories"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_include_directories()</span></code></a></p></li>
<li><p><span class="target" id="index-1-command:target_link_libraries"></span><a class="reference internal" href="target_link_libraries.html#command:target_link_libraries" title="target_link_libraries"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_link_libraries()</span></code></a></p></li>
<li><p><span class="target" id="index-0-command:target_link_directories"></span><a class="reference internal" href="target_link_directories.html#command:target_link_directories" title="target_link_directories"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_link_directories()</span></code></a></p></li>
<li><p><span class="target" id="index-0-command:target_precompile_headers"></span><a class="reference internal" href="target_precompile_headers.html#command:target_precompile_headers" title="target_precompile_headers"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_precompile_headers()</span></code></a></p></li>
<li><p><span class="target" id="index-0-command:target_sources"></span><a class="reference internal" href="target_sources.html#command:target_sources" title="target_sources"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_sources()</span></code></a></p></li>
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<h3><a href="../index.html">Table of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">target_link_options</a><ul>
<li><a class="reference internal" href="#host-and-device-specific-link-options">Host And Device Specific Link Options</a></li>
<li><a class="reference internal" href="#option-de-duplication">Option De-duplication</a></li>
<li><a class="reference internal" href="#handling-compiler-driver-differences">Handling Compiler Driver Differences</a></li>
<li><a class="reference internal" href="#see-also">See Also</a></li>
</ul>
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