-
Notifications
You must be signed in to change notification settings - Fork 4
/
Copy pathAdding-arguments.html
297 lines (260 loc) · 10.2 KB
/
Adding-arguments.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
<!DOCTYPE html>
<html lang="en">
<head>
<base href=".">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Adding arguments</title>
<link rel="stylesheet" href="assets/css/dark-frontend.css" type="text/css" title="dark">
<link rel="alternate stylesheet" href="assets/css/light-frontend.css" type="text/css" title="light">
<link rel="stylesheet" href="assets/css/bootstrap-toc.min.css" type="text/css">
<link rel="stylesheet" href="assets/css/jquery.mCustomScrollbar.min.css">
<link rel="stylesheet" href="assets/js/search/enable_search.css" type="text/css">
<link rel="stylesheet" href="assets/css/prism-tomorrow.css" type="text/css" title="dark">
<link rel="alternate stylesheet" href="assets/css/prism.css" type="text/css" title="light">
<script src="assets/js/mustache.min.js"></script>
<script src="assets/js/jquery.js"></script>
<script src="assets/js/bootstrap.js"></script>
<script src="assets/js/scrollspy.js"></script>
<script src="assets/js/typeahead.jquery.min.js"></script>
<script src="assets/js/search.js"></script>
<script src="assets/js/compare-versions.js"></script>
<script src="assets/js/jquery.mCustomScrollbar.concat.min.js"></script>
<script src="assets/js/bootstrap-toc.min.js"></script>
<script src="assets/js/jquery.touchSwipe.min.js"></script>
<script src="assets/js/anchor.min.js"></script>
<script src="assets/js/tag_filtering.js"></script>
<script src="assets/js/language_switching.js"></script>
<script src="assets/js/styleswitcher.js"></script>
<script src="assets/js/lines_around_headings.js"></script>
<script src="assets/js/prism-core.js"></script>
<script src="assets/js/prism-autoloader.js"></script>
<script src="assets/js/prism_autoloader_path_override.js"></script>
<script src="assets/js/prism-keep-markup.js"></script>
<script src="assets/js/trie.js"></script>
<link rel="icon" type="image/png" href="assets/images/favicon.png">
<link rel="shortcut icon" href="assets/images/favicon.png">
</head>
<body class="no-script
">
<script>
$('body').removeClass('no-script');
</script>
<nav class="navbar navbar-fixed-top navbar-default" id="topnav">
<div class="container-fluid">
<div class="navbar-right">
<a id="toc-toggle">
<span class="glyphicon glyphicon-menu-right"></span>
<span class="glyphicon glyphicon-menu-left"></span>
</a>
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-wrapper" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<span title="light mode switch" class="glyphicon glyphicon-sunglasses pull-right" id="lightmode-icon"></span>
<form class="navbar-form pull-right" id="navbar-search-form">
<div class="form-group has-feedback">
<input type="text" class="form-control input-sm" name="search" id="sidenav-lookup-field" placeholder="search" disabled>
<span class="glyphicon glyphicon-search form-control-feedback" id="search-mgn-glass"></span>
</div>
</form>
</div>
<div class="navbar-header">
<a id="sidenav-toggle">
<span class="glyphicon glyphicon-menu-right"></span>
<span class="glyphicon glyphicon-menu-left"></span>
</a>
<a id="home-link" href="index.html" class="hotdoc-navbar-brand">
<img src="assets/images/meson_logo.png" alt="Home">
</a>
</div>
<div class="navbar-collapse collapse" id="navbar-wrapper">
<ul class="nav navbar-nav" id="menu">
<li class="dropdown">
<a class="dropdown-toggle" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Modules <span class="caret"></span>
</a>
<ul class="dropdown-menu" id="modules-menu">
<li>
<a href="CMake-module.html">CMake</a>
</li>
<li>
<a href="Cuda-module.html">CUDA</a>
</li>
<li>
<a href="Dlang-module.html">Dlang</a>
</li>
<li>
<a href="External-Project-module.html">External Project</a>
</li>
<li>
<a href="Fs-module.html">Filesystem</a>
</li>
<li>
<a href="Gnome-module.html">GNOME</a>
</li>
<li>
<a href="Hotdoc-module.html">Hotdoc</a>
</li>
<li>
<a href="i18n-module.html">i18n</a>
</li>
<li>
<a href="Icestorm-module.html">Icestorm</a>
</li>
<li>
<a href="Java-module.html">Java</a>
</li>
<li>
<a href="Keyval-module.html">Keyval</a>
</li>
<li>
<a href="Pkgconfig-module.html">Pkgconfig</a>
</li>
<li>
<a href="Python-3-module.html">Python 3</a>
</li>
<li>
<a href="Python-module.html">Python</a>
</li>
<li>
<a href="Qt4-module.html">Qt4</a>
</li>
<li>
<a href="Qt5-module.html">Qt5</a>
</li>
<li>
<a href="Qt6-module.html">Qt6</a>
</li>
<li>
<a href="Rust-module.html">Rust</a>
</li>
<li>
<a href="Simd-module.html">Simd</a>
</li>
<li>
<a href="SourceSet-module.html">SourceSet</a>
</li>
<li>
<a href="Wayland-module.html">Wayland</a>
</li>
<li>
<a href="Windows-module.html">Windows</a>
</li>
</ul>
</li>
<li class="dropdown">
<a class="dropdown-toggle" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Quick References <span class="caret"></span>
</a>
<ul class="dropdown-menu" id="quick-refs-menu">
<li>
<a href="Reference-manual.html">Functions</a>
</li>
<li>
<a href="Build-options.html">Options</a>
</li>
<li>
<a href="Configuration.html">Configuration</a>
</li>
<li>
<a href="Dependencies.html">Dependencies</a>
</li>
<li>
<a href="Unit-tests.html">Tests</a>
</li>
<li>
<a href="Syntax.html">Syntax</a>
</li>
</ul>
</li>
</ul>
<div class="hidden-xs hidden-sm navbar-text navbar-center">
<p><b>The Meson Build System</b></p>
</div>
</div>
</div>
</nav>
<main>
<div data-extension="core" data-hotdoc-in-toplevel="True" data-hotdoc-project="Meson-documentation" data-hotdoc-ref="Adding-arguments.html" class="page_container" id="page-wrapper">
<script src="assets/js/utils.js"></script>
<div class="panel panel-collapse oc-collapsed" id="sidenav" data-hotdoc-role="navigation">
<script src="assets/js/full-width.js"></script>
<div id="sitenav-wrapper">
<iframe src="hotdoc-sitemap.html" id="sitenav-frame"></iframe>
</div>
</div>
<div id="body">
<div id="main">
<div id="page-description" data-hotdoc-role="main">
<h1 id="adding-arguments">Adding arguments</h1>
<p>Often you need to specify extra compiler arguments. Meson provides two
different ways to achieve this: global arguments and per-target
arguments.</p>
<h2 id="global-arguments">Global arguments</h2>
<p>Global compiler arguments are set with the following command. As an
example you could do this.</p>
<pre><code class="language-meson">add_global_arguments('-DFOO=bar', language : 'c')
</code></pre>
<p>This makes Meson add the define to all C compilations. Usually you
would use this setting for flags for global settings. Note that for
setting the C/C++ language standard (the <code>-std=c99</code> argument in GCC),
you would probably want to use a default option of the <a href="Reference-manual_functions.html#project"><ins><code>project()</code></ins></a>
function. For details see the <a href="Reference-manual.html">reference manual</a>.</p>
<p>Global arguments have certain limitations. They all have to be defined
before any build targets are specified. This ensures that the global
flags are the same for every single source file built in the entire
project with one exception. Compilation tests that are run as part of
your project configuration do not use these flags. The reason for that
is that you may need to run a test compile with and without a given
flag to determine your build setup. For this reason tests do not use
these global arguments.</p>
<p>You should set only the most essential flags with this setting, you
should <em>not</em> set debug or optimization flags. Instead they should be
specified by selecting an appropriate build type.</p>
<h2 id="project-arguments">Project arguments</h2>
<p>Project arguments work similar to global arguments except that they
are valid only within the current subproject. The usage is simple:</p>
<pre><code class="language-meson">add_project_arguments('-DMYPROJ=projname', language : 'c')
</code></pre>
<p>This would add the compiler flags to all C sources in the current
project.</p>
<h2 id="per-target-arguments">Per target arguments</h2>
<p>Per target arguments are just as simple to define.</p>
<pre><code class="language-meson">executable('prog', 'prog.cc', cpp_args : '-DCPPTHING')
</code></pre>
<p>Here we create a C++ executable with an extra argument that is used
during compilation but not for linking.</p>
<p>You can find the parameter name for other languages in the <a href="Reference-tables.html">reference
tables</a>.</p>
<p>Specifying extra linker arguments is done in the same way:</p>
<pre><code class="language-meson">executable('prog', 'prog.cc', link_args : '-Wl,--linker-option')
</code></pre>
</div>
</div>
<div id="search_results">
<p>The results of the search are</p>
</div>
<div id="footer">
<hr>
<div class="license-description">
Website licensing information are available on the <a href="legal.html">Legal</a> page.
</div>
</div>
</div>
<div id="toc-column">
<div class="edit-button">
<a href="https://github.com/mesonbuild/meson/edit/master/docs/markdown/Adding-arguments.md" data-hotdoc-role="edit-button">Edit on GitHub</a>
</div>
<div id="toc-wrapper">
<nav id="toc"></nav>
</div>
</div>
</div>
</main>
<script src="assets/js/navbar_offset_scroller.js"></script>
</body>
</html>