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diff --git a/docs/contents.html b/docs/contents.html index d5455421091..9a86019e2f6 100644 --- a/docs/contents.html +++ b/docs/contents.html @@ -43,6 +43,7 @@ <li><a href="install.html" target="_parent">Compiling / Installing</a> <ul> <li><a href="autoconf.html" target="_parent">Autoconf</a></li> + <li><a href="meson.html" target="_parent">Meson</a></li> </ul> </li> <li><a href="precompiled.html" target="_parent">Precompiled Libraries</a> diff --git a/docs/meson.html b/docs/meson.html new file mode 100644 index 00000000000..77f89b0c6c7 --- /dev/null +++ b/docs/meson.html @@ -0,0 +1,168 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html lang="en"> +<head> + <meta http-equiv="content-type" content="text/html; charset=utf-8"> + <title>Compilation and Installation using Meson</title> + <link rel="stylesheet" type="text/css" href="mesa.css"> +</head> +<body> + +<div class="header"> + <h1>The Mesa 3D Graphics Library</h1> +</div> + +<iframe src="contents.html"></iframe> +<div class="content"> + +<h1>Compilation and Installation using Meson</h1> + +<h2 id="basic">1. Basic Usage</h2> + +<p><strong>The Meson build system for Mesa is still under active development, +and should not be used in production environments.</strong></p> + +<p>The meson build is currently only tested on linux, and is known to not work +on macOS, Windows, and haiku. This will be fixed.</p> + +<p> +The meson program is used to configure the source directory and generates +either a ninja build file or Visual Studio® build files. The latter must +be enabled via the --backend switch, as ninja is the default backend on all +operating systems. Meson only supports out-of-tree builds, and must be passed a +directory to put built and generated sources into. We'll call that directory +"build" for examples. +</p> + +<pre> + meson build/ +</pre> + +<p> +To see a description of your options you can run <code>meson configure</code> +along with a build directory to view the selected options for. This will show +your meson global arguments and project arguments, along with their defaults +and your local settings. + +Moes does not currently support listing options before configure a build +directory, but this feature is being discussed upstream. +</p> + +<pre> + meson configure build/ +</pre> + +<p> +With additional arguments <code>meson configure</code> is used to change +options on already configured build directory. All options passed to this +command are in the form -D "command"="value". +</p> + +<pre> + meson configure build/ -Dprefix=/tmp/install -Dglx=true +</pre> + +<p> +Once you've run the initial <code>meson</code> command successfully you can use +your configured backend to build the project. With ninja, the -C option can be +be used to point at a directory to build. +</p> + +<pre> + ninja -C build/ +</pre> + +<p> +Without arguments, it will produce libGL.so and/or several other libraries +depending on the options you have chosen. Later, if you want to rebuild for a +different configuration, you should run <code>ninja clean</code> before +changing the configuration, or create a new out of tree build directory for +each configuration you want to build. + +http://mesonbuild.com/Using-multiple-build-directories.html +</p> + +<dt><code>Environment Variables</code></dt> +<dd><p>Meson supports the standard CC and CXX envrionment variables for +changing the default compiler, and CFLAGS, CXXFLAGS, and LDFLAGS for setting +options to the compiler and linker. + +The default compilers depends on your operating system. Meson supports most of +the popular compilers, a complete list is available +<a href="http://mesonbuild.com/Reference-tables.html#compiler-ids">here</a>. + +These arguments are consumed and stored by meson when it is initialized or +re-initialized. Therefore passing them to meson configure will not do anything, +and passing them to ninja will only do something if ninja decides to +re-initialze meson, for example, if a meson.build file has been changed. +Changing these variables will not cause all targets to be rebuilt, so running +ninja clean is recomended when changing CFLAGS or CXXFLAGS. meson will never +change compiler in a configured build directory. +</p> + +<pre> + CC=clang CXX=clang++ meson build-clang + ninja -C build-clang + ninja -C build-clang clean + touch meson.build + CFLAGS=-Wno-typedef-redefinition ninja -C build-clang +</pre> + +<p>Meson also honors DESTDIR for installs</p> +</dd> + + +<dt><code>LLVM</code></dt> +<dd><p>Meson includes upstream logic to wrap llvm-config using it's standard +dependncy interface. It will search $PATH (or %PATH% on windows) for +llvm-config, so using an LLVM from a non-standard path is as easy as +<code>PATH=/path/with/llvm-config:$PATH meson build</code>. +</p></dd> +</dl> + +<dt><code>PKG_CONFIG_PATH</code></dt> +<dd><p>The +<code>pkg-config</code> utility is a hard requirement for configuring and +building Mesa on Linux and *BSD. It is used to search for external libraries +on the system. This environment variable is used to control the search +path for <code>pkg-config</code>. For instance, setting +<code>PKG_CONFIG_PATH=/usr/X11R6/lib/pkgconfig</code> will search for +package metadata in <code>/usr/X11R6</code> before the standard +directories.</p> +</dd> +</dl> + +<p> +One of the oddities of meson is that some options are different when passed to +the <code>meson</code> than to <code>meson configure</code>. These options are +passed as --option=foo to <code>meson</code>, but -Doption=foo to <code>meson +configure</code>. Mesa defined options are always passed as -Doption=foo. +<p> + +<p>For those coming from autotools be aware of the following:</p> + +<dl> +<dt><code>--buildtype/-Dbuildtype</code></dt> +<dd><p>This option will set the compiler debug/optimisation levels to aid +debugging the Mesa libraries.</p> + +<p>Note that in meson this defaults to "debugoptimized", and not setting it to +"release" will yield non-optimal performance and binary size. Not using "debug" +may interfer with debbugging as some code and validation will be optimized +away. +</p> + +<p> For those wishing to pass their own -O option, use the "plain" buildtype, +which cuases meson to inject no additional compiler arguments, only those in +the C/CXXFLAGS and those that mesa itself defines.</p> +</dd> +</dl> + +<dl> +<dt><code>-Db_ndebug</code></dt> +<dd><p>This option controls assertions in meson projects. When set to false +(the default) assertions are enabled, when set to true they are disabled. This +is unrelated to the <code>buildtype</code>; setting the latter to +<code>release</code> will not turn off assertions. +</p> +</dd> +</dl> |