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<h1 id="compiler-object-compiler">Compiler object (<code>compiler</code>)</h1>
<p>This object is returned by <a href="Reference-manual_builtin_meson.html#mesonget_compiler"><ins><code>meson.get_compiler()</code></ins></a>.
It represents a compiler for a given language and allows you to query its properties.</p>
<h2 id="returned-by">Returned by</h2>
<p>Compiler object objects are returned by the following functions and methods:</p>
<ul>
<li><a href="Reference-manual_builtin_meson.html#mesonget_compiler"><ins><code>meson.get_compiler()</code></ins></a></li>
</ul>
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<p>These compiler checks do not use compiler arguments added
with <code>add_*_arguments()</code>, via <code>-Dlang_args</code> on the command-line, or
through <code>CFLAGS</code>/<code>LDFLAGS</code>, etc in the environment. Hence, you can
trust that the tests will be fully self-contained, and won't fail
because of custom flags added by other parts of the build file or by
users.</p>
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<p>Note that if you have a single prefix with all your dependencies, you
might find it easier to append to the environment variables
<code>C_INCLUDE_PATH</code> with GCC/Clang and <code>INCLUDE</code> with MSVC to expand the
default include path, and <code>LIBRARY_PATH</code> with GCC/Clang and <code>LIB</code> with
MSVC to expand the default library search path.</p>
<p>However, with GCC, these variables will be ignored when
cross-compiling. In that case you need to use a specs file. See:
http://www.mingw.org/wiki/SpecsFileHOWTO</p>
</div>
</aside>
<h2 id="compiler-object-methods">Compiler object methods</h2>
<p style="padding: 7.5px; margin: 0px;"></p>
<h3 id="compileralignment">compiler.alignment()</h3>
<p>Returns the alignment of the specified type. For C-like languages,
For C-like languages, the header <code>stddef.h</code> and <code>stdio.h</code> are included
implicitly for native compilation, only <code>stddef.h</code> is included when
cross-compiling.</p>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit of space because we remove the top margin below -->
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<h4 style="margin-top: 0px;" id="signature">Signature</h4>
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<pre><code class="language-meson"># Returns the alignment of the specified type
<a href="Reference-manual_elementary_int.html"><ins>int</ins></a> alignment(
<a href="Reference-manual_elementary_str.html"><ins>str</ins></a> <a href="Reference-manual_returned_compiler.html#alignment_typename"><b>typename</b></a>, # The name of the type to check
# Keyword arguments:
<a href="Reference-manual_returned_compiler.html#alignment_args"><b>args</b></a> : <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # Used to pass a list of compiler arguments
<a href="Reference-manual_returned_compiler.html#alignment_dependencies"><b>dependencies</b></a> : <a href="Reference-manual_returned_dep.html"><ins>dep</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_dep.html"><ins>dep</ins></a>] # Additionally dependencies required for compiling and / or linking
<a href="Reference-manual_returned_compiler.html#alignment_prefix"><b>prefix</b></a> : <a href="Reference-manual_elementary_str.html"><ins>str</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # Used to add `#include`s and other things that are required
)</code></pre>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit more space -->
<h4 id="arguments">Arguments</h4>
<p>The method <code>compiler.alignment()</code> accepts the following positional arguments:</p>
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<table>
<thead>
<tr>
<th style="white-space: nowrap; text-align: center;">Name</th>
<th style="white-space: nowrap; text-align: center;">Type</th>
<th style="width: 56%;">Description</th>
<th style="white-space: nowrap; text-align: center; width: 0px;">Tags</th>
</tr>
</thead>
<tbody class="nomargin">
<tr id="alignment_typename">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">typename</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a></td>
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<td style="width: 56%; padding: 6px;">
<p>The name of the type to check.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
</tbody>
</table>
<p style="padding: 5px; margin: 0px;"></p> <!-- Extra space -->
<p>Finally, <code>compiler.alignment()</code>
accepts the following keyword arguments:</p>
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<table>
<thead>
<tr>
<th style="white-space: nowrap; text-align: center;">Name</th>
<th style="white-space: nowrap; text-align: center;">Type</th>
<th style="width: 56%;">Description</th>
<th style="white-space: nowrap; text-align: center; width: 0px;">Tags</th>
</tr>
</thead>
<tbody class="nomargin">
<tr id="alignment_args">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">args</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Used to pass a list of compiler arguments.
Defining include paths for headers not in the default include path
via <code>-Isome/path/to/header</code> is generally supported, however, usually not
recommended.</p>
<p>This is because include directories can also be specified via the
<code>include_directories</code> or the <code>dependency</code> kwarg (if present).
The same is also true for passing libraries to link with <code>-lfoo</code>.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="alignment_dependencies">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">dependencies</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_returned_dep.html"><ins><code>dep</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_returned_dep.html"><ins><code>dep</code></ins></a>]</td>
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<td style="width: 56%; padding: 6px;">
<p>Additionally dependencies required for compiling and / or linking.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="alignment_prefix">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">prefix</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Used to add <code>#include</code>s and other things that are required
for the symbol to be declared. Since 1.0.0 an array is accepted
too. When an array is passed, the items are concatenated together
separated by a newline.
System definitions should be passed via compiler args
(eg: <code>_GNU_SOURCE</code> is often required for some symbols to be exposed
on Linux, and it should be passed via <code>args</code> keyword argument).</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
</tbody>
</table>
<p style="padding: 7.5px; margin: 0px;"></p>
<hr>
<p style="padding: 7.5px; margin: 0px;"></p>
<h3 id="compilercheck_header">compiler.check_header()</h3>
<p>Returns true if the specified header is <em>usable</em>
with the specified prefix, dependencies, and arguments.</p>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit of space because we remove the top margin below -->
<div style="display: flex;">
<h4 style="margin-top: 0px;" id="signature1">Signature</h4>
<div style="flex-grow: 1;"></div>
<div>
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><em style="color: #5affff;">(since 0.47.0)</em></p>
</div>
</div>
</div>
<pre><code class="language-meson"># Returns true if the specified header is *usable*
<a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> check_header(
<a href="Reference-manual_elementary_str.html"><ins>str</ins></a> <a href="Reference-manual_returned_compiler.html#check_header_header_name"><b>header_name</b></a>, # The header to check
# Keyword arguments:
<a href="Reference-manual_returned_compiler.html#check_header_args"><b>args</b></a> : <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # Used to pass a list of compiler arguments
<a href="Reference-manual_returned_compiler.html#check_header_dependencies"><b>dependencies</b></a> : <a href="Reference-manual_returned_dep.html"><ins>dep</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_dep.html"><ins>dep</ins></a>] # Additionally dependencies required for compiling and / or linking
<a href="Reference-manual_returned_compiler.html#check_header_include_directories"><b>include_directories</b></a> : <a href="Reference-manual_returned_inc.html"><ins>inc</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_inc.html"><ins>inc</ins></a>] # Extra directories for header searches
<a href="Reference-manual_returned_compiler.html#check_header_no_builtin_args"><b>no_builtin_args</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> # When set to `true`, the compiler arguments controlled by built-in configuration options are not added
<a href="Reference-manual_returned_compiler.html#check_header_prefix"><b>prefix</b></a> : <a href="Reference-manual_elementary_str.html"><ins>str</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # Used to add `#include`s and other things that are required
<a href="Reference-manual_returned_compiler.html#check_header_required"><b>required</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> | <a href="Reference-manual_returned_feature.html"><ins>feature</ins></a> # When set to `true`, Meson will halt if the header check fails
)</code></pre>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit more space -->
<h4 id="arguments1">Arguments</h4>
<p>The method <code>compiler.check_header()</code> accepts the following positional arguments:</p>
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</style>
<table>
<thead>
<tr>
<th style="white-space: nowrap; text-align: center;">Name</th>
<th style="white-space: nowrap; text-align: center;">Type</th>
<th style="width: 56%;">Description</th>
<th style="white-space: nowrap; text-align: center; width: 0px;">Tags</th>
</tr>
</thead>
<tbody class="nomargin">
<tr id="check_header_header_name">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">header_name</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a></td>
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<td style="width: 56%; padding: 6px;">
<p>The header to check.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
</tbody>
</table>
<p style="padding: 5px; margin: 0px;"></p> <!-- Extra space -->
<p>Finally, <code>compiler.check_header()</code>
accepts the following keyword arguments:</p>
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</style>
<table>
<thead>
<tr>
<th style="white-space: nowrap; text-align: center;">Name</th>
<th style="white-space: nowrap; text-align: center;">Type</th>
<th style="width: 56%;">Description</th>
<th style="white-space: nowrap; text-align: center; width: 0px;">Tags</th>
</tr>
</thead>
<tbody class="nomargin">
<tr id="check_header_args">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">args</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Used to pass a list of compiler arguments.
Defining include paths for headers not in the default include path
via <code>-Isome/path/to/header</code> is generally supported, however, usually not
recommended.</p>
<p>This is because include directories can also be specified via the
<code>include_directories</code> or the <code>dependency</code> kwarg (if present).
The same is also true for passing libraries to link with <code>-lfoo</code>.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="check_header_dependencies">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">dependencies</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_returned_dep.html"><ins><code>dep</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_returned_dep.html"><ins><code>dep</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Additionally dependencies required for compiling and / or linking.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="check_header_include_directories">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">include_directories</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_returned_inc.html"><ins><code>inc</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_returned_inc.html"><ins><code>inc</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Extra directories for header searches.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><em style="color: #5affff;">(since 0.38.0)</em></p>
</div>
</td>
</tr>
<tr id="check_header_no_builtin_args">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">no_builtin_args</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_bool.html"><ins><code>bool</code></ins></a></td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>When set to <code>true</code>, the compiler arguments controlled by built-in configuration options are not added.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><code class="language-meson">default =
false</code></p>
</div>
</td>
</tr>
<tr id="check_header_prefix">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">prefix</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Used to add <code>#include</code>s and other things that are required
for the symbol to be declared. Since 1.0.0 an array is accepted
too. When an array is passed, the items are concatenated together
separated by a newline.
System definitions should be passed via compiler args
(eg: <code>_GNU_SOURCE</code> is often required for some symbols to be exposed
on Linux, and it should be passed via <code>args</code> keyword argument).</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="check_header_required">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">required</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_bool.html"><ins><code>bool</code></ins></a> | <a href="Reference-manual_returned_feature.html"><ins><code>feature</code></ins></a>
</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>When set to <code>true</code>, Meson will halt if the header check fails.
When set to a <a href="Build-options.html#features"><code>feature</code></a> option, the feature will control if it is searched and whether to fail if not found.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><em style="color: #5affff;">(since 0.50.0)</em></p>
<p style="margin: 0px;"><code class="language-meson">default =
false</code></p>
</div>
</td>
</tr>
</tbody>
</table>
<p style="padding: 7.5px; margin: 0px;"></p>
<hr>
<p style="padding: 7.5px; margin: 0px;"></p>
<h3 id="compilercmd_array">compiler.cmd_array()</h3>
<p>Returns an array containing the command(s) for the compiler.</p>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit of space because we remove the top margin below -->
<div style="display: flex;">
<h4 style="margin-top: 0px;" id="signature2">Signature</h4>
<div style="flex-grow: 1;"></div>
<div>
<div style="margin: 0px; text-align: center;">
</div>
</div>
</div>
<pre><code class="language-meson"><a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] cmd_array()</code></pre>
<p style="padding: 7.5px; margin: 0px;"></p>
<hr>
<p style="padding: 7.5px; margin: 0px;"></p>
<h3 id="compilercompiles">compiler.compiles()</h3>
<p>Returns true if the code compiles.</p>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit of space because we remove the top margin below -->
<div style="display: flex;">
<h4 style="margin-top: 0px;" id="signature3">Signature</h4>
<div style="flex-grow: 1;"></div>
<div>
<div style="margin: 0px; text-align: center;">
</div>
</div>
</div>
<pre><code class="language-meson"># Returns true if the code compiles
<a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> compiles(
<a href="Reference-manual_elementary_str.html"><ins>str</ins></a> | <a href="Reference-manual_returned_file.html"><ins>file</ins></a> <a href="Reference-manual_returned_compiler.html#compiles_code"><b>code</b></a>, # The source code to check
# Keyword arguments:
<a href="Reference-manual_returned_compiler.html#compiles_args"><b>args</b></a> : <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # Used to pass a list of compiler arguments
<a href="Reference-manual_returned_compiler.html#compiles_dependencies"><b>dependencies</b></a> : <a href="Reference-manual_returned_dep.html"><ins>dep</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_dep.html"><ins>dep</ins></a>] # Additionally dependencies required for compiling and / or linking
<a href="Reference-manual_returned_compiler.html#compiles_include_directories"><b>include_directories</b></a> : <a href="Reference-manual_returned_inc.html"><ins>inc</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_inc.html"><ins>inc</ins></a>] # Extra directories for header searches
<a href="Reference-manual_returned_compiler.html#compiles_name"><b>name</b></a> : <a href="Reference-manual_elementary_str.html"><ins>str</ins></a> # The name to use for printing a message about the compiler check
<a href="Reference-manual_returned_compiler.html#compiles_no_builtin_args"><b>no_builtin_args</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> # When set to `true`, the compiler arguments controlled by built-in configuration options are not added
<a href="Reference-manual_returned_compiler.html#compiles_required"><b>required</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> | <a href="Reference-manual_returned_feature.html"><ins>feature</ins></a> # When set to `true`, Meson will halt if the check fails
<a href="Reference-manual_returned_compiler.html#compiles_werror"><b>werror</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> # When set to `true`, compiler warnings are treated as error
)</code></pre>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit more space -->
<h4 id="arguments2">Arguments</h4>
<p>The method <code>compiler.compiles()</code> accepts the following positional arguments:</p>
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<style>
.nomargin p:last-child { margin-bottom: 0px !important; }
</style>
<table>
<thead>
<tr>
<th style="white-space: nowrap; text-align: center;">Name</th>
<th style="white-space: nowrap; text-align: center;">Type</th>
<th style="width: 56%;">Description</th>
<th style="white-space: nowrap; text-align: center; width: 0px;">Tags</th>
</tr>
</thead>
<tbody class="nomargin">
<tr id="compiles_code">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">code</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a> | <a href="Reference-manual_returned_file.html"><ins><code>file</code></ins></a>
</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>The source code to check.</p>
<p>If a string is passed, the code is used directly. If a <a href="Reference-manual_returned_file.html"><ins><code>file</code></ins></a> object
is passed, its content is used for the compiler check.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
</tbody>
</table>
<p style="padding: 5px; margin: 0px;"></p> <!-- Extra space -->
<p>Finally, <code>compiler.compiles()</code>
accepts the following keyword arguments:</p>
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<style>
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</style>
<table>
<thead>
<tr>
<th style="white-space: nowrap; text-align: center;">Name</th>
<th style="white-space: nowrap; text-align: center;">Type</th>
<th style="width: 56%;">Description</th>
<th style="white-space: nowrap; text-align: center; width: 0px;">Tags</th>
</tr>
</thead>
<tbody class="nomargin">
<tr id="compiles_args">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">args</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Used to pass a list of compiler arguments.
Defining include paths for headers not in the default include path
via <code>-Isome/path/to/header</code> is generally supported, however, usually not
recommended.</p>
<p>This is because include directories can also be specified via the
<code>include_directories</code> or the <code>dependency</code> kwarg (if present).
The same is also true for passing libraries to link with <code>-lfoo</code>.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="compiles_dependencies">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">dependencies</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_returned_dep.html"><ins><code>dep</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_returned_dep.html"><ins><code>dep</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Additionally dependencies required for compiling and / or linking.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="compiles_include_directories">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">include_directories</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_returned_inc.html"><ins><code>inc</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_returned_inc.html"><ins><code>inc</code></ins></a>]</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>Extra directories for header searches.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><em style="color: #5affff;">(since 0.38.0)</em></p>
</div>
</td>
</tr>
<tr id="compiles_name">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">name</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a></td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>The name to use for printing a message about the compiler check.
If this keyword argument is not passed, no message will be printed about the check.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="compiles_no_builtin_args">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">no_builtin_args</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_bool.html"><ins><code>bool</code></ins></a></td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>When set to <code>true</code>, the compiler arguments controlled by built-in configuration options are not added.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><code class="language-meson">default =
false</code></p>
</div>
</td>
</tr>
<tr id="compiles_required">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">required</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_bool.html"><ins><code>bool</code></ins></a> | <a href="Reference-manual_returned_feature.html"><ins><code>feature</code></ins></a>
</td>
<!-- This suboptimal formatting is required to ensure hotdoc correctly generates the HTML -->
<td style="width: 56%; padding: 6px;">
<p>When set to <code>true</code>, Meson will halt if the check fails.
When set to a <a href="Build-options.html#features"><code>feature</code></a> option, the feature will control if it is searched and whether to fail if not found.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><em style="color: #5affff;">(since 1.5.0)</em></p>
<p style="margin: 0px;"><code class="language-meson">default =
false</code></p>
</div>
</td>
</tr>
<tr id="compiles_werror">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">werror</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_bool.html"><ins><code>bool</code></ins></a></td>
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<td style="width: 56%; padding: 6px;">
<p>When set to <code>true</code>, compiler warnings are treated as error.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><em style="color: #5affff;">(since 1.3.0)</em></p>
<p style="margin: 0px;"><code class="language-meson">default =
false</code></p>
</div>
</td>
</tr>
</tbody>
</table>
<p style="padding: 7.5px; margin: 0px;"></p>
<hr>
<p style="padding: 7.5px; margin: 0px;"></p>
<h3 id="compilercompute_int">compiler.compute_int()</h3>
<p>Computes the value of the given expression
(as an example <code>1 + 2</code>). When cross compiling this is evaluated with
an iterative algorithm, you can specify keyword arguments <code>low</code>
(defaults to -1024), <code>high</code> (defaults to 1024) and <code>guess</code> to
specify max and min values for the search and the value to try
first.
For C-like languages, the header <code>stddef.h</code> and <code>stdio.h</code> are included
implicitly for native compilation, only <code>stddef.h</code> is included when
cross-compiling.</p>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit of space because we remove the top margin below -->
<div style="display: flex;">
<h4 style="margin-top: 0px;" id="signature4">Signature</h4>
<div style="flex-grow: 1;"></div>
<div>
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><em style="color: #5affff;">(since 0.40.0)</em></p>
</div>
</div>
</div>
<pre><code class="language-meson"># Computes the value of the given expression
<a href="Reference-manual_elementary_int.html"><ins>int</ins></a> compute_int(
<a href="Reference-manual_elementary_str.html"><ins>str</ins></a> <a href="Reference-manual_returned_compiler.html#compute_int_expr"><b>expr</b></a>, # The expression to compute
# Keyword arguments:
<a href="Reference-manual_returned_compiler.html#compute_int_args"><b>args</b></a> : <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # Used to pass a list of compiler arguments
<a href="Reference-manual_returned_compiler.html#compute_int_dependencies"><b>dependencies</b></a> : <a href="Reference-manual_returned_dep.html"><ins>dep</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_dep.html"><ins>dep</ins></a>] # Additionally dependencies required for compiling and / or linking
<a href="Reference-manual_returned_compiler.html#compute_int_guess"><b>guess</b></a> : <a href="Reference-manual_elementary_int.html"><ins>int</ins></a> # The value to try first
<a href="Reference-manual_returned_compiler.html#compute_int_high"><b>high</b></a> : <a href="Reference-manual_elementary_int.html"><ins>int</ins></a> # The max value
<a href="Reference-manual_returned_compiler.html#compute_int_include_directories"><b>include_directories</b></a> : <a href="Reference-manual_returned_inc.html"><ins>inc</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_inc.html"><ins>inc</ins></a>] # Extra directories for header searches
<a href="Reference-manual_returned_compiler.html#compute_int_low"><b>low</b></a> : <a href="Reference-manual_elementary_int.html"><ins>int</ins></a> # The min value
<a href="Reference-manual_returned_compiler.html#compute_int_no_builtin_args"><b>no_builtin_args</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> # When set to `true`, the compiler arguments controlled by built-in configuration options are not added
<a href="Reference-manual_returned_compiler.html#compute_int_prefix"><b>prefix</b></a> : <a href="Reference-manual_elementary_str.html"><ins>str</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # Used to add `#include`s and other things that are required
)</code></pre>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit more space -->
<h4 id="arguments3">Arguments</h4>
<p>The method <code>compiler.compute_int()</code> accepts the following positional arguments:</p>
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<th style="white-space: nowrap; text-align: center;">Name</th>
<th style="white-space: nowrap; text-align: center;">Type</th>
<th style="width: 56%;">Description</th>
<th style="white-space: nowrap; text-align: center; width: 0px;">Tags</th>
</tr>
</thead>
<tbody class="nomargin">
<tr id="compute_int_expr">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">expr</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a></td>
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<td style="width: 56%; padding: 6px;">
<p>The expression to compute.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
</tbody>
</table>
<p style="padding: 5px; margin: 0px;"></p> <!-- Extra space -->
<p>Finally, <code>compiler.compute_int()</code>
accepts the following keyword arguments:</p>
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<th style="white-space: nowrap; text-align: center;">Name</th>
<th style="white-space: nowrap; text-align: center;">Type</th>
<th style="width: 56%;">Description</th>
<th style="white-space: nowrap; text-align: center; width: 0px;">Tags</th>
</tr>
</thead>
<tbody class="nomargin">
<tr id="compute_int_args">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">args</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a>]</td>
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<td style="width: 56%; padding: 6px;">
<p>Used to pass a list of compiler arguments.
Defining include paths for headers not in the default include path
via <code>-Isome/path/to/header</code> is generally supported, however, usually not
recommended.</p>
<p>This is because include directories can also be specified via the
<code>include_directories</code> or the <code>dependency</code> kwarg (if present).
The same is also true for passing libraries to link with <code>-lfoo</code>.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="compute_int_dependencies">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">dependencies</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_returned_dep.html"><ins><code>dep</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_returned_dep.html"><ins><code>dep</code></ins></a>]</td>
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<td style="width: 56%; padding: 6px;">
<p>Additionally dependencies required for compiling and / or linking.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="compute_int_guess">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">guess</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_int.html"><ins><code>int</code></ins></a></td>
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<td style="width: 56%; padding: 6px;">
<p>The value to try first.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
<tr id="compute_int_high">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">high</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_int.html"><ins><code>int</code></ins></a></td>
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<td style="width: 56%; padding: 6px;">
<p>The max value.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><code class="language-meson">default =
1024</code></p>
</div>
</td>
</tr>
<tr id="compute_int_include_directories">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">include_directories</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_returned_inc.html"><ins><code>inc</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_returned_inc.html"><ins><code>inc</code></ins></a>]</td>
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<td style="width: 56%; padding: 6px;">
<p>Extra directories for header searches.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><em style="color: #5affff;">(since 0.38.0)</em></p>
</div>
</td>
</tr>
<tr id="compute_int_low">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">low</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_int.html"><ins><code>int</code></ins></a></td>
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<td style="width: 56%; padding: 6px;">
<p>The min value.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><code class="language-meson">default =
-1024</code></p>
</div>
</td>
</tr>
<tr id="compute_int_no_builtin_args">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">no_builtin_args</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;"><a href="Reference-manual_elementary_bool.html"><ins><code>bool</code></ins></a></td>
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<td style="width: 56%; padding: 6px;">
<p>When set to <code>true</code>, the compiler arguments controlled by built-in configuration options are not added.</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
<p style="margin: 0px;"><code class="language-meson">default =
false</code></p>
</div>
</td>
</tr>
<tr id="compute_int_prefix">
<td style="white-space: nowrap; text-align: center; padding: 6px;"><code class="language-meson">prefix</code></td>
<td style="white-space: revert; text-align: center; padding: 6px; word-wrap: break-word;">
<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a> | <a href="Reference-manual_elementary_list.html"><ins><code>list</code></ins></a>[<a href="Reference-manual_elementary_str.html"><ins><code>str</code></ins></a>]</td>
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<td style="width: 56%; padding: 6px;">
<p>Used to add <code>#include</code>s and other things that are required
for the symbol to be declared. Since 1.0.0 an array is accepted
too. When an array is passed, the items are concatenated together
separated by a newline.
System definitions should be passed via compiler args
(eg: <code>_GNU_SOURCE</code> is often required for some symbols to be exposed
on Linux, and it should be passed via <code>args</code> keyword argument).</p>
</td>
<td style="white-space: nowrap; text-align: center; padding: 6px; width: 0px;">
<div style="margin: 0px; text-align: center;">
</div>
</td>
</tr>
</tbody>
</table>
<p style="padding: 7.5px; margin: 0px;"></p>
<hr>
<p style="padding: 7.5px; margin: 0px;"></p>
<h3 id="compilerfind_library">compiler.find_library()</h3>
<p>Tries to find the library specified in the positional argument.</p>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit of space because we remove the top margin below -->
<div style="display: flex;">
<h4 style="margin-top: 0px;" id="signature5">Signature</h4>
<div style="flex-grow: 1;"></div>
<div>
<div style="margin: 0px; text-align: center;">
</div>
</div>
</div>
<pre><code class="language-meson"># Tries to find the library specified in the positional argument
<a href="Reference-manual_returned_dep.html"><ins>dep</ins></a> find_library(
<a href="Reference-manual_elementary_str.html"><ins>str</ins></a> <a href="Reference-manual_returned_compiler.html#find_library_libname"><b>libname</b></a>, # The library to find
# Keyword arguments:
<a href="Reference-manual_returned_compiler.html#find_library_dirs"><b>dirs</b></a> : <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # Additional directories to search in
<a href="Reference-manual_returned_compiler.html#find_library_disabler"><b>disabler</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> # If `true`, this method will return a <a href="Reference-manual_returned_disabler.html"><ins><code>disabler</code></ins></a> on a failed check.
<a href="Reference-manual_returned_compiler.html#find_library_has_headers"><b>has_headers</b></a> : <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # List of headers that must be found as well
<a href="Reference-manual_returned_compiler.html#find_library_header_args"><b>header_args</b></a> : <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_elementary_str.html"><ins>str</ins></a>] # When the `has_headers` kwarg is also used, this argument is passed to
<a href="Reference-manual_returned_compiler.html#find_library_header_dependencies"><b>header_dependencies</b></a> : <a href="Reference-manual_returned_dep.html"><ins>dep</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_dep.html"><ins>dep</ins></a>] # When the `has_headers` kwarg is also used, this argument is passed to
<a href="Reference-manual_returned_compiler.html#find_library_header_include_directories"><b>header_include_directories</b></a> : <a href="Reference-manual_returned_inc.html"><ins>inc</ins></a> | <a href="Reference-manual_elementary_list.html"><ins>list</ins></a>[<a href="Reference-manual_returned_inc.html"><ins>inc</ins></a>] # When the `has_headers` kwarg is also used, this argument is passed to
<a href="Reference-manual_returned_compiler.html#find_library_header_no_builtin_args"><b>header_no_builtin_args</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> # When the `has_headers` kwarg is also used, this argument is passed to
<a href="Reference-manual_returned_compiler.html#find_library_header_prefix"><b>header_prefix</b></a> : <a href="Reference-manual_elementary_str.html"><ins>str</ins></a> # When the `has_headers` kwarg is also used, this argument is passed to
<a href="Reference-manual_returned_compiler.html#find_library_required"><b>required</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> | <a href="Reference-manual_returned_feature.html"><ins>feature</ins></a> # If set `true`, Meson will abort with an error if the library could not
<a href="Reference-manual_returned_compiler.html#find_library_static"><b>static</b></a> : <a href="Reference-manual_elementary_bool.html"><ins>bool</ins></a> # If `true`, the search is limited to static libraries only
)</code></pre>
<p style="padding: 5px; margin: 0px;"></p> <!-- A bit more space -->
<h4 id="arguments4">Arguments</h4>
<p>The method <code>compiler.find_library()</code> accepts the following positional arguments:</p>
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