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 <section id="cmake-3-18-release-notes">
<h1><a class="toc-backref" href="#id4" role="doc-backlink">CMake 3.18 Release Notes</a><a class="headerlink" href="#cmake-3-18-release-notes" title="Permalink to this heading">¶</a></h1>
<nav class="contents" id="contents">
Contents
<ul class="simple">
<li><a class="reference internal" href="#cmake-3-18-release-notes" id="id4">CMake 3.18 Release Notes</a>
<ul>
<li><a class="reference internal" href="#new-features" id="id5">New Features</a>
<ul>
<li><a class="reference internal" href="#languages" id="id6">Languages</a></li>
<li><a class="reference internal" href="#command-line" id="id7">Command-Line</a></li>
<li><a class="reference internal" href="#commands" id="id8">Commands</a></li>
<li><a class="reference internal" href="#variables" id="id9">Variables</a></li>
<li><a class="reference internal" href="#properties" id="id10">Properties</a></li>
<li><a class="reference internal" href="#modules" id="id11">Modules</a></li>
<li><a class="reference internal" href="#generator-expressions" id="id12">Generator Expressions</a></li>
<li><a class="reference internal" href="#ctest" id="id13">CTest</a></li>
<li><a class="reference internal" href="#cpack" id="id14">CPack</a></li>
<li><a class="reference internal" href="#other" id="id15">Other</a></li>
</ul>
</li>
<li><a class="reference internal" href="#deprecated-and-removed-features" id="id16">Deprecated and Removed Features</a></li>
<li><a class="reference internal" href="#other-changes" id="id17">Other Changes</a></li>
<li><a class="reference internal" href="#updates" id="id18">Updates</a>
<ul>
<li><a class="reference internal" href="#id1" id="id19">3.18.1</a></li>
<li><a class="reference internal" href="#id2" id="id20">3.18.2</a></li>
<li><a class="reference internal" href="#id3" id="id21">3.18.3</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</nav>
Changes made since CMake 3.17 include the following.
<section id="new-features">
<h2><a class="toc-backref" href="#id5" role="doc-backlink">New Features</a><a class="headerlink" href="#new-features" title="Permalink to this heading">¶</a></h2>
<section id="languages">
<h3><a class="toc-backref" href="#id6" role="doc-backlink">Languages</a><a class="headerlink" href="#languages" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The <code class="docutils literal notranslate">CUDA</code> language can now be compiled using Clang on non-Windows
platforms. Separable compilation is not yet supported on any platform.</li>
</ul>
</section>
<section id="command-line">
<h3><a class="toc-backref" href="#id7" role="doc-backlink">Command-Line</a><a class="headerlink" href="#command-line" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li><a class="reference internal" href="../manual/cmake.1.html#manual:cmake(1)" title="cmake(1)"><code class="xref cmake cmake-manual docutils literal notranslate">cmake(1)</code></a> gained support for profiling of CMake scripts through
the parameters <code class="docutils literal notranslate">--profiling-output</code> and <code class="docutils literal notranslate">--profiling-format</code>.</li>
<li><a class="reference internal" href="../manual/cmake.1.html#manual:cmake(1)" title="cmake(1)"><code class="xref cmake cmake-manual docutils literal notranslate">cmake(1)</code></a> gained a <code class="docutils literal notranslate">cat</code> command line
option that can be used to concatenate files and print them
on standard output.</li>
</ul>
</section>
<section id="commands">
<h3><a class="toc-backref" href="#id8" role="doc-backlink">Commands</a><a class="headerlink" href="#commands" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The <a class="reference internal" href="../command/add_library.html#command:add_library" title="add_library"><code class="xref cmake cmake-command docutils literal notranslate">add_library()</code></a> and <a class="reference internal" href="../command/add_executable.html#command:add_executable" title="add_executable"><code class="xref cmake cmake-command docutils literal notranslate">add_executable()</code></a> commands
learned to create <a class="reference internal" href="../manual/cmake-buildsystem.7.html#alias-targets">Alias Targets</a> referencing non-<code class="docutils literal notranslate">GLOBAL</code>
<a class="reference internal" href="../manual/cmake-buildsystem.7.html#imported-targets">Imported Targets</a>.</li>
<li>The <a class="reference internal" href="../command/cmake_language.html#command:cmake_language" title="cmake_language"><code class="xref cmake cmake-command docutils literal notranslate">cmake_language()</code></a> command was added for meta-operations on
scripted or built-in commands, starting with a mode to <code class="docutils literal notranslate">CALL</code> other
commands, and <code class="docutils literal notranslate">EVAL CODE</code> to inplace evaluate a CMake script.</li>
<li>The <a class="reference internal" href="../command/execute_process.html#command:execute_process" title="execute_process"><code class="xref cmake cmake-command docutils literal notranslate">execute_process()</code></a> command gained the <code class="docutils literal notranslate">ECHO_OUTPUT_VARIABLE</code>
and <code class="docutils literal notranslate">ECHO_ERROR_VARIABLE</code> options.</li>
<li>The <a class="reference internal" href="../command/export.html#command:export" title="export"><code class="xref cmake cmake-command docutils literal notranslate">export()</code></a> command now raise an error if used multiple times with
same <code class="docutils literal notranslate">FILE</code> without <code class="docutils literal notranslate">APPEND</code>. See policy <a class="reference internal" href="../policy/CMP0103.html#policy:CMP0103" title="CMP0103"><code class="xref cmake cmake-policy docutils literal notranslate">CMP0103</code></a>.</li>
<li>The <a class="reference internal" href="../command/file.html#command:file" title="file"><code class="xref cmake cmake-command docutils literal notranslate">file()</code></a> command gained the <code class="docutils literal notranslate">ARCHIVE_CREATE</code> and
<code class="docutils literal notranslate">ARCHIVE_EXTRACT</code> subcommands to expose the <a class="reference internal" href="../manual/cmake.1.html#manual:cmake(1)" title="cmake(1)"><code class="xref cmake cmake-manual docutils literal notranslate">cmake(1)</code></a> <code class="docutils literal notranslate">-E tar</code>
functionality to CMake scripting code.</li>
<li>The <a class="reference internal" href="../command/file.html#command:file" title="file"><code class="xref cmake cmake-command docutils literal notranslate">file(CONFIGURE)</code></a> subcommand was created in order to replicate
the <a class="reference internal" href="../command/configure_file.html#command:configure_file" title="configure_file"><code class="xref cmake cmake-command docutils literal notranslate">configure_file()</code></a> functionality without resorting to a
pre-existing file on disk as input. The content is instead passed as a
string.</li>
<li>The <a class="reference internal" href="../command/file.html#command:file" title="file"><code class="xref cmake cmake-command docutils literal notranslate">file(UPLOAD)</code></a> command gained <code class="docutils literal notranslate">TLS_VERIFY</code> and <code class="docutils literal notranslate">TLS_CAINFO</code>
options to control server certificate verification.</li>
<li>The <a class="reference internal" href="../command/find_program.html#command:find_program" title="find_program"><code class="xref cmake cmake-command docutils literal notranslate">find_program()</code></a>, <a class="reference internal" href="../command/find_library.html#command:find_library" title="find_library"><code class="xref cmake cmake-command docutils literal notranslate">find_library()</code></a>, <a class="reference internal" href="../command/find_path.html#command:find_path" title="find_path"><code class="xref cmake cmake-command docutils literal notranslate">find_path()</code></a>
and <a class="reference internal" href="../command/find_file.html#command:find_file" title="find_file"><code class="xref cmake cmake-command docutils literal notranslate">find_file()</code></a> commands gained a new <code class="docutils literal notranslate">REQUIRED</code> option that will
stop processing with an error message if nothing is found.</li>
<li>The <a class="reference internal" href="../command/get_property.html#command:get_property" title="get_property"><code class="xref cmake cmake-command docutils literal notranslate">get_property()</code></a> command with <code class="docutils literal notranslate">SOURCE</code> scope gained the
<code class="docutils literal notranslate">DIRECTORY</code> and <code class="docutils literal notranslate">TARGET_DIRECTORY</code> options to get a property
from the provided directory scope.</li>
<li>The <a class="reference internal" href="../command/get_source_file_property.html#command:get_source_file_property" title="get_source_file_property"><code class="xref cmake cmake-command docutils literal notranslate">get_source_file_property()</code></a> command gained the <code class="docutils literal notranslate">DIRECTORY</code>
and <code class="docutils literal notranslate">TARGET_DIRECTORY</code> options to get a property from the
provided directory scope.</li>
<li>The <a class="reference internal" href="../command/list.html#command:list" title="list"><code class="xref cmake cmake-command docutils literal notranslate">list()</code></a> operation <code class="docutils literal notranslate">SORT</code> gained the <code class="docutils literal notranslate">NATURAL</code> sort
option to sort using natural order (see <code class="docutils literal notranslate">strverscmp(3)</code> manual).</li>
<li>The <a class="reference internal" href="../command/set_property.html#command:set_property" title="set_property"><code class="xref cmake cmake-command docutils literal notranslate">set_property()</code></a> command with the <code class="docutils literal notranslate">SOURCE</code> scope gained the
<code class="docutils literal notranslate">DIRECTORY</code> and <code class="docutils literal notranslate">TARGET_DIRECTORY</code> options to set properties
in the provided directory scopes.</li>
<li>The <a class="reference internal" href="../command/set_source_files_properties.html#command:set_source_files_properties" title="set_source_files_properties"><code class="xref cmake cmake-command docutils literal notranslate">set_source_files_properties()</code></a> command gained the <code class="docutils literal notranslate">DIRECTORY</code>
and <code class="docutils literal notranslate">TARGET_DIRECTORY</code> options to set properties in the provided
directory scopes.</li>
<li>The <a class="reference internal" href="../command/string.html#command:string" title="string"><code class="xref cmake cmake-command docutils literal notranslate">string()</code></a> command learned a new <code class="docutils literal notranslate">HEX</code> sub-command, which
converts strings into their hexadecimal representation.</li>
</ul>
</section>
<section id="variables">
<h3><a class="toc-backref" href="#id9" role="doc-backlink">Variables</a><a class="headerlink" href="#variables" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>A <a class="reference internal" href="../variable/CMAKE_CUDA_ARCHITECTURES.html#variable:CMAKE_CUDA_ARCHITECTURES" title="CMAKE_CUDA_ARCHITECTURES"><code class="xref cmake cmake-variable docutils literal notranslate">CMAKE_CUDA_ARCHITECTURES</code></a> variable was added to specify
CUDA output architectures. Users are encouraged to use this instead of
specifying options manually, as this approach is compiler-agnostic.
The variable is initialized automatically when
<a class="reference internal" href="../variable/CMAKE_LANG_COMPILER_ID.html#variable:CMAKE_&lt;LANG&gt;_COMPILER_ID" title="CMAKE_&lt;LANG&gt;_COMPILER_ID"><code class="xref cmake cmake-variable docutils literal notranslate">CMAKE_CUDA_COMPILER_ID</code></a> is <code class="docutils literal notranslate">NVIDIA</code>.
The variable is used to initialize the new <a class="reference internal" href="../prop_tgt/CUDA_ARCHITECTURES.html#prop_tgt:CUDA_ARCHITECTURES" title="CUDA_ARCHITECTURES"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">CUDA_ARCHITECTURES</code></a>
target property. See policy <a class="reference internal" href="../policy/CMP0104.html#policy:CMP0104" title="CMP0104"><code class="xref cmake cmake-policy docutils literal notranslate">CMP0104</code></a>.</li>
<li>The <a class="reference internal" href="../variable/CMAKE_PCH_WARN_INVALID.html#variable:CMAKE_PCH_WARN_INVALID" title="CMAKE_PCH_WARN_INVALID"><code class="xref cmake cmake-variable docutils literal notranslate">CMAKE_PCH_WARN_INVALID</code></a> variable was added to initialize the
<a class="reference internal" href="../prop_tgt/PCH_WARN_INVALID.html#prop_tgt:PCH_WARN_INVALID" title="PCH_WARN_INVALID"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">PCH_WARN_INVALID</code></a> target property to allow the removal of the
precompiled header invalid warning.</li>
</ul>
</section>
<section id="properties">
<h3><a class="toc-backref" href="#id10" role="doc-backlink">Properties</a><a class="headerlink" href="#properties" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The <a class="reference internal" href="../prop_tgt/CUDA_ARCHITECTURES.html#prop_tgt:CUDA_ARCHITECTURES" title="CUDA_ARCHITECTURES"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">CUDA_ARCHITECTURES</code></a> target property was added to specify
CUDA output architectures. Users are encouraged to use this instead of
specifying options manually, as this approach is compiler-agnostic.
The property is initialized by the new <a class="reference internal" href="../variable/CMAKE_CUDA_ARCHITECTURES.html#variable:CMAKE_CUDA_ARCHITECTURES" title="CMAKE_CUDA_ARCHITECTURES"><code class="xref cmake cmake-variable docutils literal notranslate">CMAKE_CUDA_ARCHITECTURES</code></a>
variable. See policy <a class="reference internal" href="../policy/CMP0104.html#policy:CMP0104" title="CMP0104"><code class="xref cmake cmake-policy docutils literal notranslate">CMP0104</code></a>.</li>
<li>The <a class="reference internal" href="../prop_tgt/Fortran_PREPROCESS.html#prop_tgt:Fortran_PREPROCESS" title="Fortran_PREPROCESS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">Fortran_PREPROCESS</code></a> target property and
<a class="reference internal" href="../prop_sf/Fortran_PREPROCESS.html#prop_sf:Fortran_PREPROCESS" title="Fortran_PREPROCESS"><code class="xref cmake cmake-prop_sf docutils literal notranslate">Fortran_PREPROCESS</code></a> source-file property were added to
control preprocessing of Fortran source files.</li>
<li>The <a class="reference internal" href="../prop_tgt/FRAMEWORK_MULTI_CONFIG_POSTFIX_CONFIG.html#prop_tgt:FRAMEWORK_MULTI_CONFIG_POSTFIX_&lt;CONFIG&gt;" title="FRAMEWORK_MULTI_CONFIG_POSTFIX_&lt;CONFIG&gt;"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">FRAMEWORK_MULTI_CONFIG_POSTFIX_&lt;CONFIG&gt;</code></a> target property
and associated <a class="reference internal" href="../variable/CMAKE_FRAMEWORK_MULTI_CONFIG_POSTFIX_CONFIG.html#variable:CMAKE_FRAMEWORK_MULTI_CONFIG_POSTFIX_&lt;CONFIG&gt;" title="CMAKE_FRAMEWORK_MULTI_CONFIG_POSTFIX_&lt;CONFIG&gt;"><code class="xref cmake cmake-variable docutils literal notranslate">CMAKE_FRAMEWORK_MULTI_CONFIG_POSTFIX_&lt;CONFIG&gt;</code></a>
variable were created to allow adding a postfix to the name of a
framework file name when using a multi-config generator.</li>
<li>The <a class="reference internal" href="../prop_sf/OBJECT_OUTPUTS.html#prop_sf:OBJECT_OUTPUTS" title="OBJECT_OUTPUTS"><code class="xref cmake cmake-prop_sf docutils literal notranslate">OBJECT_OUTPUTS</code></a> source file property now supports
<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">generator expressions</code></a>.</li>
<li>The <a class="reference internal" href="../prop_tgt/PCH_WARN_INVALID.html#prop_tgt:PCH_WARN_INVALID" title="PCH_WARN_INVALID"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">PCH_WARN_INVALID</code></a> target property was added to allow the
removal of the precompiled header invalid warning.</li>
<li>The <a class="reference internal" href="../prop_tgt/UNITY_BUILD_MODE.html#prop_tgt:UNITY_BUILD_MODE" title="UNITY_BUILD_MODE"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">UNITY_BUILD_MODE</code></a> target property was added to tell
generators which algorithm to use for grouping included source
files.</li>
<li>The <a class="reference internal" href="../prop_tgt/VS_SOURCE_SETTINGS_tool.html#prop_tgt:VS_SOURCE_SETTINGS_&lt;tool&gt;" title="VS_SOURCE_SETTINGS_&lt;tool&gt;"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">VS_SOURCE_SETTINGS_&lt;tool&gt;</code></a> target property was added
to tell <a class="reference internal" href="../manual/cmake-generators.7.html#visual-studio-generators">Visual Studio Generators</a> for VS 2010 and above to add
metadata to non-built source files using <code class="docutils literal notranslate">&lt;tool&gt;</code>.</li>
<li>The <a class="reference internal" href="../prop_sf/VS_SETTINGS.html#prop_sf:VS_SETTINGS" title="VS_SETTINGS"><code class="xref cmake cmake-prop_sf docutils literal notranslate">VS_SETTINGS</code></a> source file property was added to tell
<a class="reference internal" href="../manual/cmake-generators.7.html#visual-studio-generators">Visual Studio Generators</a> for VS 2010 and above to add
metadata to a non-built source file.</li>
<li>The <a class="reference internal" href="../prop_tgt/VS_PLATFORM_TOOLSET.html#prop_tgt:VS_PLATFORM_TOOLSET" title="VS_PLATFORM_TOOLSET"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">VS_PLATFORM_TOOLSET</code></a> target property was added to tell
<a class="reference internal" href="../manual/cmake-generators.7.html#visual-studio-generators">Visual Studio Generators</a> for VS 2010 and above to override
the platform toolset.</li>
<li>The <a class="reference internal" href="../prop_tgt/VS_SOLUTION_DEPLOY.html#prop_tgt:VS_SOLUTION_DEPLOY" title="VS_SOLUTION_DEPLOY"><code class="xref cmake cmake-prop_tgt docutils literal notranslate">VS_SOLUTION_DEPLOY</code></a> target property was added to tell
<a class="reference internal" href="../manual/cmake-generators.7.html#visual-studio-generators">Visual Studio Generators</a> for VS 2010 and above to mark a
target for deployment even when not building for Windows Phone/Store/CE.</li>
</ul>
</section>
<section id="modules">
<h3><a class="toc-backref" href="#id11" role="doc-backlink">Modules</a><a class="headerlink" href="#modules" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The <a class="reference internal" href="../module/CheckLinkerFlag.html#module:CheckLinkerFlag" title="CheckLinkerFlag"><code class="xref cmake cmake-module docutils literal notranslate">CheckLinkerFlag</code></a> module has been added to provide a
facility to check validity of link flags.</li>
<li>The <a class="reference internal" href="../module/ExternalProject.html#module:ExternalProject" title="ExternalProject"><code class="xref cmake cmake-module docutils literal notranslate">ExternalProject</code></a> module <a class="reference internal" href="../module/ExternalProject.html#command:externalproject_add" title="externalproject_add"><code class="xref cmake cmake-command docutils literal notranslate">ExternalProject_Add()</code></a> command
gained a new <code class="docutils literal notranslate">GIT_REMOTE_UPDATE_STRATEGY</code> keyword. This can be used to
specify how failed rebase operations during a git update should be handled.
The <code class="docutils literal notranslate">CMAKE_EP_GIT_REMOTE_UPDATE_STRATEGY</code> variable was also added as a
global default and is honored by both the <a class="reference internal" href="../module/ExternalProject.html#module:ExternalProject" title="ExternalProject"><code class="xref cmake cmake-module docutils literal notranslate">ExternalProject</code></a> and
<a class="reference internal" href="../module/FetchContent.html#module:FetchContent" title="FetchContent"><code class="xref cmake cmake-module docutils literal notranslate">FetchContent</code></a> modules.</li>
<li>The <a class="reference internal" href="../module/FetchContent.html#module:FetchContent" title="FetchContent"><code class="xref cmake cmake-module docutils literal notranslate">FetchContent</code></a> module <a class="reference internal" href="../module/FetchContent.html#command:fetchcontent_declare" title="fetchcontent_declare"><code class="xref cmake cmake-command docutils literal notranslate">FetchContent_Declare()</code></a> command
now supports a <code class="docutils literal notranslate">SOURCE_SUBDIR</code> option. It can be used to direct
<a class="reference internal" href="../module/FetchContent.html#command:fetchcontent_makeavailable" title="fetchcontent_makeavailable"><code class="xref cmake cmake-command docutils literal notranslate">FetchContent_MakeAvailable()</code></a> to look in a different location
for the <code class="docutils literal notranslate">CMakeLists.txt</code> file.</li>
<li>The <a class="reference internal" href="../module/FindBLAS.html#module:FindBLAS" title="FindBLAS"><code class="xref cmake cmake-module docutils literal notranslate">FindBLAS</code></a> module now provides an imported target.</li>
<li>The <a class="reference internal" href="../module/FindCUDAToolkit.html#module:FindCUDAToolkit" title="FindCUDAToolkit"><code class="xref cmake cmake-module docutils literal notranslate">FindCUDAToolkit</code></a> module:
<ul>
<li>gained the variable
<code class="docutils literal notranslate">CUDAToolkit_LIBRARY_ROOT</code>, which is the directory containing the
<code class="docutils literal notranslate">nvvm</code> directory and <code class="docutils literal notranslate">version.txt</code>.</li>
<li>uses toolkit and library root found during <code class="docutils literal notranslate">CUDA</code> compiler detection.</li>
</ul>
</li>
<li>The <a class="reference internal" href="../module/FindLAPACK.html#module:FindLAPACK" title="FindLAPACK"><code class="xref cmake cmake-module docutils literal notranslate">FindLAPACK</code></a> module now provides an imported target.</li>
<li>The <a class="reference internal" href="../module/FindPython3.html#module:FindPython3" title="FindPython3"><code class="xref cmake cmake-module docutils literal notranslate">FindPython3</code></a>, <a class="reference internal" href="../module/FindPython2.html#module:FindPython2" title="FindPython2"><code class="xref cmake cmake-module docutils literal notranslate">FindPython2</code></a> and <a class="reference internal" href="../module/FindPython.html#module:FindPython" title="FindPython"><code class="xref cmake cmake-module docutils literal notranslate">FindPython</code></a>
modules:
<ul>
<li>gained the possibility to create per-artifact cache variables for
interactive editing in <a class="reference internal" href="../manual/cmake-gui.1.html#manual:cmake-gui(1)" title="cmake-gui(1)"><code class="xref cmake cmake-manual docutils literal notranslate">cmake-gui(1)</code></a> and <a class="reference internal" href="../manual/ccmake.1.html#manual:ccmake(1)" title="ccmake(1)"><code class="xref cmake cmake-manual docutils literal notranslate">ccmake(1)</code></a>.</li>
<li>gained sub-components <code class="docutils literal notranslate">Development.Module</code> and
<code class="docutils literal notranslate">Development.Embed</code> under the <code class="docutils literal notranslate">Development</code> component.</li>
<li>gained the capability to specify which Python implementations to find,
including <code class="docutils literal notranslate">IronPython</code> and <code class="docutils literal notranslate">PyPy</code>.</li>
</ul>
</li>
<li>The <a class="reference internal" href="../module/FindRuby.html#module:FindRuby" title="FindRuby"><code class="xref cmake cmake-module docutils literal notranslate">FindRuby</code></a> module input and output variables were all renamed
from <code class="docutils literal notranslate">RUBY_</code> to <code class="docutils literal notranslate">Ruby_</code> for consistency with other find modules.
Input variables of the old case will be honored if provided, and output
variables of the old case are always provided.</li>
<li>The <a class="reference internal" href="../module/FindSWIG.html#module:FindSWIG" title="FindSWIG"><code class="xref cmake cmake-module docutils literal notranslate">FindSWIG</code></a> module now accepts target languages as <code class="docutils literal notranslate">COMPONENTS</code>
and <code class="docutils literal notranslate">OPTIONAL_COMPONENTS</code> arguments to <code class="docutils literal notranslate">find_package</code>.</li>
<li>The <a class="reference internal" href="../module/GoogleTest.html#module:GoogleTest" title="GoogleTest"><code class="xref cmake cmake-module docutils literal notranslate">GoogleTest</code></a> module <a class="reference internal" href="../module/GoogleTest.html#command:gtest_discover_tests" title="gtest_discover_tests"><code class="xref cmake cmake-command docutils literal notranslate">gtest_discover_tests()</code></a> command:
<ul>
<li>gained a new <code class="docutils literal notranslate">DISCOVERY_MODE</code> option to control when the test
discovery step is run. It offers a new <code class="docutils literal notranslate">PRE_TEST</code> setting to
run the discovery at test time instead of build time. A new
<code class="docutils literal notranslate">CMAKE_GTEST_DISCOVER_TESTS_DISCOVERY_MODE</code> variable can be used
to change the default globally.</li>
<li>gained a new optional parameter <code class="docutils literal notranslate">XML_OUTPUT_DIR</code>. When set the
JUnit XML test results are stored in that directory.</li>
</ul>
</li>
<li>The <a class="reference internal" href="../module/FindLibXslt.html#module:FindLibXslt" title="FindLibXslt"><code class="xref cmake cmake-module docutils literal notranslate">FindLibXslt</code></a> module now provides imported targets.</li>
<li>The <a class="reference internal" href="../module/UseSWIG.html#module:UseSWIG" title="UseSWIG"><code class="xref cmake cmake-module docutils literal notranslate">UseSWIG</code></a> module now supports Fortran as a target language if
the <code class="docutils literal notranslate">SWIG_EXECUTABLE</code> is <a class="reference external" href="https://github.com/swig-fortran/swig">SWIG-Fortran</a>.</li>
</ul>
</section>
<section id="generator-expressions">
<h3><a class="toc-backref" href="#id12" role="doc-backlink">Generator Expressions</a><a class="headerlink" href="#generator-expressions" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The <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">$&lt;DEVICE_LINK:...&gt;</code></a> and <a class="reference internal" href="../manual/cmake-generator-expressions.7.html#genex:HOST_LINK" title="HOST_LINK"><code class="xref cmake cmake-genex docutils literal notranslate">$&lt;HOST_LINK:...&gt;</code></a>
generator expressions were added to manage device and host link steps.</li>
<li>The <a class="reference internal" href="../manual/cmake-generator-expressions.7.html#genex:LINK_LANGUAGE" title="LINK_LANGUAGE"><code class="xref cmake cmake-genex docutils literal notranslate">$&lt;LINK_LANGUAGE:...&gt;</code></a> and <a class="reference internal" href="../manual/cmake-generator-expressions.7.html#genex:LINK_LANG_AND_ID" title="LINK_LANG_AND_ID"><code class="xref cmake cmake-genex docutils literal notranslate">$&lt;LINK_LANG_AND_ID:...&gt;</code></a>
generator expressions were added.</li>
</ul>
</section>
<section id="ctest">
<h3><a class="toc-backref" href="#id13" role="doc-backlink">CTest</a><a class="headerlink" href="#ctest" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li><a class="reference internal" href="../manual/ctest.1.html#manual:ctest(1)" title="ctest(1)"><code class="xref cmake cmake-manual docutils literal notranslate">ctest(1)</code></a> gained a new <a class="reference internal" href="../variable/CTEST_RESOURCE_SPEC_FILE.html#variable:CTEST_RESOURCE_SPEC_FILE" title="CTEST_RESOURCE_SPEC_FILE"><code class="xref cmake cmake-variable docutils literal notranslate">CTEST_RESOURCE_SPEC_FILE</code></a>
variable, which can be used to specify a
<a class="reference internal" href="../manual/ctest.1.html#ctest-resource-specification-file">resource specification file</a>.</li>
<li><a class="reference internal" href="../manual/ctest.1.html#manual:ctest(1)" title="ctest(1)"><code class="xref cmake cmake-manual docutils literal notranslate">ctest(1)</code></a> gained a <code class="docutils literal notranslate">--stop-on-failure</code> option,
which can be used to stop running the tests once one has failed.</li>
<li>The <a class="reference internal" href="../command/ctest_test.html#command:ctest_test" title="ctest_test"><code class="xref cmake cmake-command docutils literal notranslate">ctest_test()</code></a> command gained a <code class="docutils literal notranslate">STOP_ON_FAILURE</code> option
which can be used to stop running the tests once one has failed.</li>
<li>The <a class="reference internal" href="../module/CTestCoverageCollectGCOV.html#module:CTestCoverageCollectGCOV" title="CTestCoverageCollectGCOV"><code class="xref cmake cmake-module docutils literal notranslate">CTestCoverageCollectGCOV</code></a> module
<a class="reference internal" href="../module/CTestCoverageCollectGCOV.html#command:ctest_coverage_collect_gcov" title="ctest_coverage_collect_gcov"><code class="xref cmake cmake-command docutils literal notranslate">ctest_coverage_collect_gcov()</code></a> command gained a
<code class="docutils literal notranslate">TARBALL_COMPRESSION</code> option to control compression of the
tarball of collected results.</li>
</ul>
</section>
<section id="cpack">
<h3><a class="toc-backref" href="#id14" role="doc-backlink">CPack</a><a class="headerlink" href="#cpack" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The <a class="reference internal" href="../cpack_gen/archive.html#cpack_gen:CPack Archive Generator" title="CPack Archive Generator"><code class="xref cmake cmake-cpack_gen docutils literal notranslate">CPack Archive Generator</code></a>'s <code class="docutils literal notranslate">TXZ</code> format learned the
<a class="reference internal" href="../cpack_gen/archive.html#variable:CPACK_ARCHIVE_THREADS" title="CPACK_ARCHIVE_THREADS"><code class="xref cmake cmake-variable docutils literal notranslate">CPACK_ARCHIVE_THREADS</code></a> variable to enable parallel compression.
Requires support in the <code class="docutils literal notranslate">liblzma</code> used by CMake.</li>
<li>The <a class="reference internal" href="../cpack_gen/nsis.html#cpack_gen:CPack NSIS Generator" title="CPack NSIS Generator"><code class="xref cmake cmake-cpack_gen docutils literal notranslate">CPack NSIS Generator</code></a> gained a new variable
<a class="reference internal" href="../cpack_gen/nsis.html#variable:CPACK_NSIS_MANIFEST_DPI_AWARE" title="CPACK_NSIS_MANIFEST_DPI_AWARE"><code class="xref cmake cmake-variable docutils literal notranslate">CPACK_NSIS_MANIFEST_DPI_AWARE</code></a> to declare that the
installer is DPI-aware.</li>
<li>The <a class="reference internal" href="../cpack_gen/rpm.html#cpack_gen:CPack RPM Generator" title="CPack RPM Generator"><code class="xref cmake cmake-cpack_gen docutils literal notranslate">CPack RPM Generator</code></a> gained
<a class="reference internal" href="../cpack_gen/rpm.html#variable:CPACK_RPM_PRE_TRANS_SCRIPT_FILE" title="CPACK_RPM_PRE_TRANS_SCRIPT_FILE"><code class="xref cmake cmake-variable docutils literal notranslate">CPACK_RPM_PRE_TRANS_SCRIPT_FILE</code></a> and
<a class="reference internal" href="../cpack_gen/rpm.html#variable:CPACK_RPM_POST_TRANS_SCRIPT_FILE" title="CPACK_RPM_POST_TRANS_SCRIPT_FILE"><code class="xref cmake cmake-variable docutils literal notranslate">CPACK_RPM_POST_TRANS_SCRIPT_FILE</code></a>
variables to specify pre- and post-transaction scripts.</li>
</ul>
</section>
<section id="other">
<h3><a class="toc-backref" href="#id15" role="doc-backlink">Other</a><a class="headerlink" href="#other" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li><a class="reference internal" href="../manual/cmake-gui.1.html#manual:cmake-gui(1)" title="cmake-gui(1)"><code class="xref cmake cmake-manual docutils literal notranslate">cmake-gui(1)</code></a> now populates its generator selection
widget default value from the <a class="reference internal" href="../envvar/CMAKE_GENERATOR.html#envvar:CMAKE_GENERATOR" title="CMAKE_GENERATOR"><code class="xref cmake cmake-envvar docutils literal notranslate">CMAKE_GENERATOR</code></a> environment
variable. Additionally, environment variables
<a class="reference internal" href="../envvar/CMAKE_GENERATOR_PLATFORM.html#envvar:CMAKE_GENERATOR_PLATFORM" title="CMAKE_GENERATOR_PLATFORM"><code class="xref cmake cmake-envvar docutils literal notranslate">CMAKE_GENERATOR_PLATFORM</code></a> and <a class="reference internal" href="../envvar/CMAKE_GENERATOR_TOOLSET.html#envvar:CMAKE_GENERATOR_TOOLSET" title="CMAKE_GENERATOR_TOOLSET"><code class="xref cmake cmake-envvar docutils literal notranslate">CMAKE_GENERATOR_TOOLSET</code></a>
are used to populate their respective widget defaults.</li>
<li><a class="reference internal" href="../manual/ccmake.1.html#manual:ccmake(1)" title="ccmake(1)"><code class="xref cmake cmake-manual docutils literal notranslate">ccmake(1)</code></a> learned to read a <a class="reference internal" href="../envvar/CCMAKE_COLORS.html#envvar:CCMAKE_COLORS" title="CCMAKE_COLORS"><code class="xref cmake cmake-envvar docutils literal notranslate">CCMAKE_COLORS</code></a>
environment variable to customize colors.</li>
<li>The <a class="reference internal" href="../manual/cmake-compile-features.7.html#manual:cmake-compile-features(7)" title="cmake-compile-features(7)"><code class="xref cmake cmake-manual docutils literal notranslate">Compile Features</code></a> functionality
is now aware of the availability of C11 features in MSVC 19.27 and 19.28,
including support for the <code class="docutils literal notranslate">c_restrict</code>, <code class="docutils literal notranslate">c_static_assert</code> features and
the <code class="docutils literal notranslate">-std:c11</code> flag.</li>
</ul>
</section>
</section>
<section id="deprecated-and-removed-features">
<h2><a class="toc-backref" href="#id16" role="doc-backlink">Deprecated and Removed Features</a><a class="headerlink" href="#deprecated-and-removed-features" title="Permalink to this heading">¶</a></h2>
<ul class="simple">
<li>The <a class="reference internal" href="../module/Documentation.html#module:Documentation" title="Documentation"><code class="xref cmake cmake-module docutils literal notranslate">Documentation</code></a> module has been deprecated via
<a class="reference internal" href="../policy/CMP0106.html#policy:CMP0106" title="CMP0106"><code class="xref cmake cmake-policy docutils literal notranslate">CMP0106</code></a>. This module was essentially VTK code that CMake should
not be shipping anymore.</li>
<li>An explicit deprecation diagnostic was added for policy <code class="docutils literal notranslate">CMP0070</code>
and policy <code class="docutils literal notranslate">CMP0071</code> (<code class="docutils literal notranslate">CMP0069</code> and below were already deprecated).
The <a class="reference internal" href="../manual/cmake-policies.7.html#manual:cmake-policies(7)" title="cmake-policies(7)"><code class="xref cmake cmake-manual docutils literal notranslate">cmake-policies(7)</code></a> manual explains that the OLD behaviors
of all policies are deprecated and that projects should port to the
NEW behaviors.</li>
</ul>
</section>
<section id="other-changes">
<h2><a class="toc-backref" href="#id17" role="doc-backlink">Other Changes</a><a class="headerlink" href="#other-changes" title="Permalink to this heading">¶</a></h2>
<ul class="simple">
<li>On Windows, the <a class="reference internal" href="../generator/Ninja.html#generator:Ninja" title="Ninja"><code class="xref cmake cmake-generator docutils literal notranslate">Ninja</code></a> and <a class="reference internal" href="../generator/Ninja%20Multi-Config.html#generator:Ninja Multi-Config" title="Ninja Multi-Config"><code class="xref cmake cmake-generator docutils literal notranslate">Ninja Multi-Config</code></a>
generators, when a compiler is not explicitly specified, now select
the first compiler (of any name) found in directories listed by the
<code class="docutils literal notranslate">PATH</code> environment variable.</li>
<li>The <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">LINK_OPTIONS</code></a> and <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">INTERFACE_LINK_OPTIONS</code></a> target
properties are now used for the device link step.
See policy <a class="reference internal" href="../policy/CMP0105.html#policy:CMP0105" title="CMP0105"><code class="xref cmake cmake-policy docutils literal notranslate">CMP0105</code></a>.</li>
<li>Creation of an <code class="docutils literal notranslate">ALIAS</code> target overwriting an existing target now raises an
error. See policy <a class="reference internal" href="../policy/CMP0107.html#policy:CMP0107" title="CMP0107"><code class="xref cmake cmake-policy docutils literal notranslate">CMP0107</code></a>.</li>
<li>Linking a target to itself through an alias now raises an error.
See policy <a class="reference internal" href="../policy/CMP0108.html#policy:CMP0108" title="CMP0108"><code class="xref cmake cmake-policy docutils literal notranslate">CMP0108</code></a>.</li>
<li>The <a class="reference internal" href="../module/FindPackageHandleStandardArgs.html#module:FindPackageHandleStandardArgs" title="FindPackageHandleStandardArgs"><code class="xref cmake cmake-module docutils literal notranslate">FindPackageHandleStandardArgs</code></a> module option <code class="docutils literal notranslate">REQUIRED_VARS</code>
is now optional if <code class="docutils literal notranslate">HANDLE_COMPONENTS</code> is specified.</li>
<li>The <a class="reference internal" href="../command/source_group.html#command:source_group" title="source_group"><code class="xref cmake cmake-command docutils literal notranslate">source_group()</code></a> command now also recognizes forward slashes
as subgroup delimiters, not just backslashes.</li>
<li><a class="reference internal" href="../manual/ctest.1.html#manual:ctest(1)" title="ctest(1)"><code class="xref cmake cmake-manual docutils literal notranslate">ctest(1)</code></a> now logs environment variables that it sets for each test,
either due to the <a class="reference internal" href="../prop_test/ENVIRONMENT.html#prop_test:ENVIRONMENT" title="ENVIRONMENT"><code class="xref cmake cmake-prop_test docutils literal notranslate">ENVIRONMENT</code></a> property or the
<a class="reference internal" href="../manual/ctest.1.html#ctest-resource-allocation">resource allocation</a> feature, and submits
this log to CDash. It does not log environment variables that were set
outside of CTest.</li>
<li>When building CMake itself from source and not using a system-provided
libcurl, HTTP/2 support is now enabled for commands supporting
network communication via <code class="docutils literal notranslate">http(s)</code>, such as <a class="reference internal" href="../command/file.html#command:file" title="file"><code class="xref cmake cmake-command docutils literal notranslate">file(DOWNLOAD)</code></a>,
<a class="reference internal" href="../command/file.html#command:file" title="file"><code class="xref cmake cmake-command docutils literal notranslate">file(UPLOAD)</code></a>, and <a class="reference internal" href="../command/ctest_submit.html#command:ctest_submit" title="ctest_submit"><code class="xref cmake cmake-command docutils literal notranslate">ctest_submit()</code></a>.
The precompiled binaries provided on <code class="docutils literal notranslate">cmake.org</code> now support HTTP/2.</li>
<li>The <a class="reference internal" href="../manual/cmake-file-api.7.html#manual:cmake-file-api(7)" title="cmake-file-api(7)"><code class="xref cmake cmake-manual docutils literal notranslate">cmake-file-api(7)</code></a> &quot;codemodel&quot; version 2 <code class="docutils literal notranslate">version</code> field has
been updated to 2.1.</li>
<li>The <a class="reference internal" href="../manual/cmake-file-api.7.html#manual:cmake-file-api(7)" title="cmake-file-api(7)"><code class="xref cmake cmake-manual docutils literal notranslate">cmake-file-api(7)</code></a> &quot;codemodel&quot; version 2 &quot;target&quot; object gained
a new <code class="docutils literal notranslate">precompileHeaders</code> field in the <code class="docutils literal notranslate">compileGroups</code> objects.</li>
</ul>
</section>
<section id="updates">
<h2><a class="toc-backref" href="#id18" role="doc-backlink">Updates</a><a class="headerlink" href="#updates" title="Permalink to this heading">¶</a></h2>
Changes made since CMake 3.18.0 include the following.
<section id="id1">
<h3><a class="toc-backref" href="#id19" role="doc-backlink">3.18.1</a><a class="headerlink" href="#id1" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The <a class="reference internal" href="../generator/Xcode.html#generator:Xcode" title="Xcode"><code class="xref cmake cmake-generator docutils literal notranslate">Xcode</code></a> generator, when <a class="reference internal" href="../variable/CMAKE_OSX_ARCHITECTURES.html#variable:CMAKE_OSX_ARCHITECTURES" title="CMAKE_OSX_ARCHITECTURES"><code class="xref cmake cmake-variable docutils literal notranslate">CMAKE_OSX_ARCHITECTURES</code></a>
is not defined, now selects <code class="docutils literal notranslate">$(NATIVE_ARCH_ACTUAL)</code> as the default
architecture (the Xcode <code class="docutils literal notranslate">ARCHS</code> setting). This is needed for Xcode 12
to select the host's architecture, which older versions of Xcode did
by default.</li>
<li>In CMake 3.18.0 the <a class="reference internal" href="../command/add_test.html#command:add_test" title="add_test"><code class="xref cmake cmake-command docutils literal notranslate">add_test()</code></a> command learned to support
special characters in test names. This was accidentally left out of
its release notes. Unfortunately the fix breaks existing projects
that were using manual quoting or escaping to work around the prior
limitation. This fix has been reverted in 3.18.1, but may be
re-introduced in future versions of CMake with a policy for compatibility.</li>
</ul>
</section>
<section id="id2">
<h3><a class="toc-backref" href="#id20" role="doc-backlink">3.18.2</a><a class="headerlink" href="#id2" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The default value of <a class="reference internal" href="../variable/CMAKE_AUTOMOC_PATH_PREFIX.html#variable:CMAKE_AUTOMOC_PATH_PREFIX" title="CMAKE_AUTOMOC_PATH_PREFIX"><code class="xref cmake cmake-variable docutils literal notranslate">CMAKE_AUTOMOC_PATH_PREFIX</code></a> was changed to
<code class="docutils literal notranslate">OFF</code> because this feature can break existing projects that have
identically named header files in different include directories.
This restores compatibility with behavior of CMake 3.15 and below.
The default was also changed to <code class="docutils literal notranslate">OFF</code> in 3.16.9 and 3.17.5.</li>
<li>The <a class="reference internal" href="../manual/cmake-compile-features.7.html#manual:cmake-compile-features(7)" title="cmake-compile-features(7)"><code class="xref cmake cmake-manual docutils literal notranslate">Compile Features</code></a> functionality
was updated for MSVC 19.27 as mentioned above (<code class="docutils literal notranslate">c_restrict</code>).</li>
</ul>
</section>
<section id="id3">
<h3><a class="toc-backref" href="#id21" role="doc-backlink">3.18.3</a><a class="headerlink" href="#id3" title="Permalink to this heading">¶</a></h3>
<ul class="simple">
<li>The <a class="reference internal" href="../manual/cmake-compile-features.7.html#manual:cmake-compile-features(7)" title="cmake-compile-features(7)"><code class="xref cmake cmake-manual docutils literal notranslate">Compile Features</code></a> functionality
was updated for MSVC 19.28 as mentioned above (<code class="docutils literal notranslate">c_static_assert</code>).</li>
</ul>
</section>
</section>
</section>

<div class="clearer"></div>
 </div>
 </div>
 </div>
 <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
 <div class="sphinxsidebarwrapper">
 <div>
 <h3><a href="../index.html">Table of Contents</a></h3>
 <ul>
<li><a class="reference internal" href="#">CMake 3.18 Release Notes</a><ul>
<li><a class="reference internal" href="#new-features">New Features</a><ul>
<li><a class="reference internal" href="#languages">Languages</a></li>
<li><a class="reference internal" href="#command-line">Command-Line</a></li>
<li><a class="reference internal" href="#commands">Commands</a></li>
<li><a class="reference internal" href="#variables">Variables</a></li>
<li><a class="reference internal" href="#properties">Properties</a></li>
<li><a class="reference internal" href="#modules">Modules</a></li>
<li><a class="reference internal" href="#generator-expressions">Generator Expressions</a></li>
<li><a class="reference internal" href="#ctest">CTest</a></li>
<li><a class="reference internal" href="#cpack">CPack</a></li>
<li><a class="reference internal" href="#other">Other</a></li>
</ul>
</li>
<li><a class="reference internal" href="#deprecated-and-removed-features">Deprecated and Removed Features</a></li>
<li><a class="reference internal" href="#other-changes">Other Changes</a></li>
<li><a class="reference internal" href="#updates">Updates</a><ul>
<li><a class="reference internal" href="#id1">3.18.1</a></li>
<li><a class="reference internal" href="#id2">3.18.2</a></li>
<li><a class="reference internal" href="#id3">3.18.3</a></li>
</ul>
</li>
</ul>
</li>
</ul>

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 <div>
 <h4>Previous topic</h4>
 <a href="3.19.html"
 title="previous chapter">CMake 3.19 Release Notes</a>
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 <h4>Next topic</h4>
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 title="next chapter">CMake 3.17 Release Notes</a>
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