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Compiling and Installing
========================
.. toctree::
:maxdepth: 1
:hidden:
meson
1. Prerequisites for building
-----------------------------
1.1 General
~~~~~~~~~~~
Build system
^^^^^^^^^^^^
- `Meson <https://mesonbuild.com>`__ is required when building on \*nix
platforms and on Windows.
- Android Build system when building as native Android component. Meson
is used when building ARC.
Compiler
^^^^^^^^
The following compilers are known to work, if you know of others or
you're willing to maintain support for other compiler get in touch.
- GCC 8.0.0 or later (some parts of Mesa may require later versions)
- Clang 5.0 or later (some parts of Mesa may require later versions)
- Microsoft Visual Studio 2019 Version 16.11 or later and
Windows SDK of at least 20348 is required, for building on Windows.
Third party/extra tools.
^^^^^^^^^^^^^^^^^^^^^^^^
- `Python <https://www.python.org/>`__ - Python 3.6 or newer is required.
- `Python Mako module <https://www.makotemplates.org/>`__ - Python Mako
module is required. Version 0.8.0 or later should work.
- Lex / Yacc - for building the Mesa IR and GLSL compiler.
On Linux systems, Flex and Bison versions 2.5.35 and 2.4.1,
respectively, (or later) should work. On Windows with MinGW, install
Flex and Bison with:
.. code-block:: console
mingw-get install msys-flex msys-bison
For MSVC on Windows, install `Win
flex-bison <https://sourceforge.net/projects/winflexbison/>`__.
.. note::
Some versions can be buggy (e.g. Flex 2.6.2) so do try others
if things fail.
1.2 Requirements
~~~~~~~~~~~~~~~~
The requirements depends on the features selected at configure stage.
Check/install the respective development package as prompted by the
configure error message.
Here are some common ways to retrieve most/all of the dependencies based
on the packaging tool used by your distro.
.. code-block:: console
zypper source-install --build-deps-only Mesa # openSUSE/SLED/SLES
yum-builddep mesa # yum Fedora, OpenSuse(?)
dnf builddep mesa # dnf Fedora
apt-get build-dep mesa # Debian and derivatives
... # others
2. Building with meson
----------------------
**Meson >= 0.46.0 is required**
Meson is the latest build system in mesa, it is currently able to build
for \*nix systems like Linux and BSD, macOS, Haiku, and Windows.
The general approach is:
.. code-block:: console
meson setup builddir/
ninja -C builddir/
sudo ninja -C builddir/ install
On Windows you can also use the Visual Studio backend
.. code-block:: console
meson setup builddir --backend=vs
cd builddir
msbuild mesa.sln /m
Please read the :doc:`detailed meson instructions <meson>` for more
information
3. Running against a local build
--------------------------------
It's often necessary or useful when debugging driver issues or testing new
branches to run against a local build of Mesa without doing a system-wide
install. To do this, choose a temporary location for the install. A directory
called ``installdir`` inside your mesa tree is as good as anything. All of the
commands below will assume ``$MESA_INSTALLDIR`` is an absolute path to this
location.
First, configure Mesa and install in the temporary location:
.. code-block:: console
meson setup builddir/ -Dprefix="$MESA_INSTALLDIR" OTHER_OPTIONS
ninja -C builddir/ install
where ``OTHER_OPTIONS`` is replaced by any meson configuration options you may
want. For instance, if you want to build the LLVMpipe drivers, it would look
like this:
.. code-block:: console
meson setup builddir/ -Dprefix="$MESA_INSTALLDIR" \
-Dgallium-drivers=swrast -Dvulkan-drivers=swrast
ninja -C builddir/ install
Once Mesa has built and installed to ``$MESA_INSTALLDIR``, you can run any app
against your temporary install by setting the right environment variables.
Which variable you have to set depends on the API.
OpenGL
~~~~~~
.. code-block:: console
LD_LIBRARY_PATH="$MESA_INSTALLDIR/lib64" glxinfo
You may need to use ``lib`` instead of ``lib64`` on some systems or a full
library specifier on debian. Look inside ``installdir`` for the directory that
contains ``libGL.so`` and use that one.
Vulkan
~~~~~~
.. code-block:: console
VK_ICD_FILENAMES="$MESA_INSTALLDIR/share/vulkan/icd/my_icd.json" vulkaninfo
where ``my_icd.json`` is replaced with the actual ICD json file name. This
will depend on your driver. For instance, the 64-bit Lavapipe driver ICD file
is named ``lvp_icd.x86_64.json``.
OpenCL
~~~~~~
.. code-block:: console
OCL_ICD_VENDORS="$MESA_INSTALLDIR/etc/OpenCL/vendors" clinfo
Unlike Vulkan, OpenCL takes a path to the whole ``vendors`` folder and will
enumerate any drivers found there.
Troubleshooting local builds
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If you are trying to run an app against a local build and it's not working,
here are a few things to check:
1. Double-check your paths and try with the simplest app you can. Before
banging your head on a Steam game, make sure your path works with
``glxgears`` first.
2. Watch out for wrapper scripts. Some more complex apps such as games have
big start-up scripts. Sometimes those scripts scrub the environment or set
``LD_LIBRARY_PATH`` to something in the game's install directory.
3. Is your Mesa build the same arch as your app? Lots of games are still
32-bit and your Mesa build is probably 64-bit by default.
4. 32 and 64-bit builds in the same local install directory doesn't typically
work. Distributions go to great lengths to make this work in your system
install and it's hard to get it right for a local install. If you've
recently built 64-bit and are now building 32-bit, throw away the install
directory first to prevent conflicts.
4. Building with AOSP (Android)
-------------------------------
<TODO>
5. Library Information
----------------------
When compilation has finished, look in the top-level ``lib/`` (or
``lib64/``) directory. You'll see a set of library files similar to
this:
.. code-block:: console
lrwxrwxrwx 1 brian users 10 Mar 26 07:53 libGL.so -> libGL.so.1*
lrwxrwxrwx 1 brian users 19 Mar 26 07:53 libGL.so.1 -> libGL.so.1.5.060100*
-rwxr-xr-x 1 brian users 3375861 Mar 26 07:53 libGL.so.1.5.060100*
lrwxrwxrwx 1 brian users 14 Mar 26 07:53 libOSMesa.so -> libOSMesa.so.6*
lrwxrwxrwx 1 brian users 23 Mar 26 07:53 libOSMesa.so.6 -> libOSMesa.so.6.1.060100*
-rwxr-xr-x 1 brian users 23871 Mar 26 07:53 libOSMesa.so.6.1.060100*
**libGL** is the main OpenGL library (i.e. Mesa), while **libOSMesa** is
the OSMesa (Off-Screen) interface library.
If you built the DRI hardware drivers, you'll also see the DRI drivers:
.. code-block:: console
-rwxr-xr-x 1 brian users 16895413 Jul 21 12:11 i915_dri.so
-rwxr-xr-x 1 brian users 16895413 Jul 21 12:11 i965_dri.so
-rwxr-xr-x 1 brian users 11849858 Jul 21 12:12 r200_dri.so
-rwxr-xr-x 1 brian users 11757388 Jul 21 12:12 radeon_dri.so
If you built with Gallium support, look in lib/gallium/ for
Gallium-based versions of libGL and device drivers.
6. Building OpenGL programs with pkg-config
-------------------------------------------
Running ``ninja install`` will install package configuration files for
the pkg-config utility.
When compiling your OpenGL application you can use pkg-config to
determine the proper compiler and linker flags.
For example, compiling and linking a GLUT application can be done with:
.. code-block:: console
gcc `pkg-config --cflags --libs glut` mydemo.c -o mydemo
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