mesa/meson_options.txt

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# Copyright © 2017-2019 Intel Corporation
# SPDX-License-Identifier: MIT
option(
'split-debug',
type : 'feature',
value : 'disabled',
description : 'split debug information (-gsplit-dwarf compile flag) and debug information in the gdb index format (--gdb-index)',
)
option(
'platforms',
type : 'array',
value : ['auto'],
choices : [
'auto', 'x11', 'wayland', 'haiku', 'android', 'windows', 'macos',
],
description : 'window systems to support. If this is set to `auto`, all ' +
'platforms applicable will be enabled.'
)
option(
'egl-native-platform',
type : 'combo',
value : 'auto',
choices : [
'auto', 'x11', 'wayland', 'haiku', 'android', 'windows',
'surfaceless', 'drm',
],
description : 'the window system EGL assumes for EGL_DEFAULT_DISPLAY',
)
option(
'android-stub',
type : 'boolean',
value : false,
description : 'Build against android-stub',
)
option(
'android-strict',
type : 'boolean',
value : true,
description : 'Enable strict Android compliance. Disabling may cause CTS ' +
'failures or other problems, but allows drivers to expose ' +
'capabilities that are normally hidden. Default: true'
)
option(
'android-libbacktrace',
type : 'feature',
description : 'Use Android\'s libbacktrace',
)
option(
'dri-drivers-path',
type : 'string',
value : '',
description : 'Location to install dri drivers. Default: $libdir/dri.'
)
option(
'unversion-libgallium',
type : 'boolean',
value : false,
description : 'Do not include mesa version in libgallium DSO filename. ' +
'Do not enable unless you know what you are doing. Default: false'
)
option(
'expat',
type : 'feature',
value : 'auto',
description : 'Controls the use of expat. ' +
'Cannot be disabled if xmlconfig is enabled.'
)
option(
'gallium-drivers',
type : 'array',
value : ['auto'],
choices : [
'auto', 'radeonsi', 'r300', 'r600', 'nouveau', 'freedreno',
'swrast', 'v3d', 'vc4', 'etnaviv', 'tegra', 'i915', 'svga', 'virgl',
'panfrost', 'iris', 'lima', 'zink', 'd3d12', 'asahi', 'crocus', 'all',
'softpipe', 'llvmpipe',
],
description : 'List of gallium drivers to build. If this is set to auto ' +
'all drivers applicable to the target OS/architecture ' +
'will be built.'
)
option(
'gallium-extra-hud',
type : 'boolean',
value : false,
description : 'Enable HUD block/NIC I/O HUD status support',
)
option(
'gallium-vdpau',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'enable gallium vdpau frontend.',
)
option(
'vdpau-libs-path',
type : 'string',
value : '',
description : 'path to put vdpau libraries. defaults to $libdir/vdpau.'
)
option(
'gallium-va',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'enable gallium va frontend.',
)
option(
'va-libs-path',
type : 'string',
value : '',
description : 'path to put va libraries. defaults to $libdir/dri.'
)
option(
'gallium-xa',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'enable gallium xa frontend.',
)
option(
'gallium-nine',
type : 'boolean',
value : false,
description : 'build gallium "nine" Direct3D 9.x frontend.',
)
option(
'gallium-d3d10umd',
type : 'boolean',
value : false,
description : 'build gallium D3D10 WDDM UMD frontend.',
)
option(
'gallium-opencl',
type : 'combo',
choices : ['icd', 'standalone', 'disabled'],
value : 'disabled',
description : 'build gallium "clover" OpenCL frontend.',
)
option(
'gallium-rusticl',
type : 'boolean',
value : false,
description : 'build gallium "rusticl" OpenCL frontend.',
)
option(
'gallium-rusticl-enable-drivers',
type : 'array',
value : ['auto', 'asahi'],
description : 'List of gallium drivers for which rusticl will be enabled ' +
'by default',
)
option(
'gallium-wgl-dll-name',
type : 'string',
value : 'libgallium_wgl',
description : 'name of gallium wgl target DLL built for Windows. ' +
'defaults to libgallium_wgl.dll to match DRI',
)
option(
'gallium-d3d10-dll-name',
type : 'string',
value : 'libgallium_d3d10',
description : 'name of gallium d3d10 target DLL built for Windows. ' +
'defaults to libgallium_d3d10.dll to match DRI',
)
option(
'static-libclc',
type : 'array',
value : [],
choices : ['spirv', 'spirv64', 'all'],
description : 'Link libclc SPIR-V statically.',
)
option(
'd3d-drivers-path',
type : 'string',
value : '',
description : 'Location of D3D drivers. Default: $libdir/d3d',
)
option(
'vulkan-drivers',
type : 'array',
value : ['auto'],
choices : ['auto', 'amd', 'broadcom', 'freedreno', 'intel', 'intel_hasvk',
'panfrost', 'swrast', 'virtio', 'imagination-experimental',
'microsoft-experimental', 'nouveau', 'asahi', 'gfxstream',
'all'],
description : 'List of vulkan drivers to build. If this is set to auto ' +
'all drivers applicable to the target OS/architecture ' +
'will be built'
)
# Note that currently turnip supports msm and kgsl, while the gallium driver
# support msm and virtio. This is a temporary situation with virtio support
# for turnip and kgsl support for gallium planned/in-progress.
option(
'freedreno-kmds',
type : 'array',
value : ['msm'],
choices : ['msm', 'kgsl', 'virtio', 'wsl'],
description : 'List of kernel-mode drivers to enable for freedreno ' +
'gallium and vulkan driver',
)
option(
'imagination-srv',
type : 'boolean',
value : false,
description : 'Enable Services backend for Imagination Technologies ' +
'vulkan driver',
)
option(
'shader-cache',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build with on-disk shader cache support.',
)
option(
'shader-cache-default',
type : 'boolean',
value : true,
description : 'If set to false, the feature is only activated when ' +
'environment variable MESA_SHADER_CACHE_DISABLE is set ' +
'to false',
)
option(
'shader-cache-max-size',
type : 'string',
value : '',
description : 'Default value for MESA_SHADER_CACHE_MAX_SIZE enviroment ' +
'variable. If set, determines the maximum size of the ' +
'on-disk cache of compiled shader programs, can be overriden ' +
'by enviroment variable if needed. Should be set to a number ' +
'optionally followed by ``K``, ``M``, or ``G`` to specify ' +
'a size in kilobytes, megabytes, or gigabytes. By default, ' +
'gigabytes will be assumed. And if unset, a maximum size of ' +
'1GB will be used.'
)
option(
'vulkan-icd-dir',
type : 'string',
value : '',
description : 'Location relative to prefix to put vulkan icds on install. ' +
'Default: $datadir/vulkan/icd.d'
)
option(
'moltenvk-dir',
type : 'string',
value : '',
description : 'Location of the MoltenVk SDK. Default: '
)
option(
'vulkan-layers',
type : 'array',
value : [],
vulkan/screenshot-layer: Add Vulkan screenshot layer This change adds a Vulkan screenshot layer that allows users to take screenshots from a Vulkan application, but has an emphasis on performance, decreasing the performance impact on the application involved. This allows for automated setups to use this layer to take screenshots for navigating various in-application menus. This layer works by hooking into various common Vulkan setup functions, until it enters the vkQueuePresentKHR function, and from there it copies the current frame's image from the swapchain as an RGB image to host-cached memory, where we will receive the information as a framebuffer pointer. From there, we copy the framebuffer contents to a thread that will detach from the main process so it can write the image to a PNG file without holding back the main thread. This layer was created from using the existing overlay layer as a template, then adding portions of LunarG's VulkanTools screenshot layer: https://github.com/LunarG/VulkanTools/blob/main/layersvt/screenshot.cpp More specifically, there were usages of functions, along with modifications of various functions from screenshot.cpp in the VulkanTools project, used in screenshot.cpp. There are some sections of the screenshotting functionality that remain unmodified from the original screenshot.cpp file in VulkanTools, including the global locking structures and the writeFile() function, which takes care of obtaining the images from the swapchain. There were various areas in which modifications were made, including how images are written to a file (using PNG instead of PPM, introducing threading, added fences/semaphores, etc), along with many smaller changes. v2: Fix segfault upon application exit v3: Fix filename issue with concatenation, along with some leftover memory handling that wasn't cleaned up. v4: Fix some error handling and nits v5: Fix output directory handling Reviewed-by: Ivan Briano <ivan.briano@intel.com Signed-off-by: Casey Bowman <casey.g.bowman@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30527>
2024-05-30 14:39:45 +08:00
choices : ['device-select', 'intel-nullhw', 'overlay', 'screenshot'],
description : 'List of vulkan layers to build'
)
option(
'shared-glapi',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Whether to build a shared or static glapi. Defaults to ' +
'disabled on Windows, enabled elsewhere'
)
option(
'gles1',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build support for OpenGL ES 1.x'
)
option(
'gles2',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build support for OpenGL ES 2.x and 3.x'
)
option(
'opengl',
type : 'boolean',
value : true,
description : 'Build support for desktop OpenGL'
)
option(
'gbm',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build support for gbm platform'
)
option(
'gbm-backends-path',
type : 'string',
value : '',
description : 'Locations to search for gbm backends, passed as colon ' +
'separated list. Default: $libdir/gbm.'
)
option(
'glx',
type : 'combo',
value : 'auto',
choices : ['auto', 'disabled', 'dri', 'xlib'],
description : 'Build support for GLX platform'
)
option(
'egl',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build support for EGL platform'
)
option(
'glvnd',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Enable GLVND support.'
)
option(
'microsoft-clc',
type : 'feature',
value : 'auto',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build support for the Microsoft CLC to DXIL compiler'
)
option(
'spirv-to-dxil',
type : 'boolean',
value : false,
description : 'Build support for the SPIR-V to DXIL library'
)
option(
'glvnd-vendor-name',
type : 'string',
value : 'mesa',
description : 'Vendor name string to use for glvnd libraries'
)
option(
'glx-read-only-text',
type : 'boolean',
value : false,
description : 'Disable writable .text section on x86 (decreases performance)'
)
option(
'llvm',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build with LLVM support.'
)
option(
'shared-llvm',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Whether to link LLVM shared or statically.'
)
option(
'draw-use-llvm',
type : 'boolean',
value : true,
description : 'Whether to use LLVM for the Gallium draw module, if LLVM ' +
'is included.'
)
option(
'amd-use-llvm',
type : 'boolean',
value : true,
description : 'Whether to use LLVM for the AMD drivers, if LLVM ' +
'is included.'
)
option (
'llvm-orcjit',
type : 'boolean',
value : false,
description: 'Build llvmpipe with LLVM ORCJIT support. Has no effect when ' +
'building for architectures without LLVM MCJIT support -- ' +
'ORCJIT is the only choice on such architectures and will ' +
'always be enabled.'
)
option(
'valgrind',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build with valgrind support'
)
option(
'libunwind',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Use libunwind for stack-traces'
)
option(
'lmsensors',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Enable HUD lmsensors support.'
)
option(
'build-tests',
type : 'boolean',
value : false,
description : 'Build unit tests. Currently this will build *all* unit ' +
'tests except the ACO tests, which may build more than expected.'
)
option(
'enable-glcpp-tests',
type : 'boolean',
value : true,
description : 'Build glcpp unit tests. These are flaky on CI.'
)
option(
'build-aco-tests',
type : 'boolean',
value : false,
description : 'Build ACO tests. These require RADV and glslang but not ' +
'an AMD GPU.'
)
option(
'install-intel-gpu-tests',
type : 'boolean',
value : false,
description : 'Build and install Intel unit tests which require the GPU. ' +
'This option is for developers and the Intel CI system only.'
)
option(
'html-docs',
type : 'feature',
value : 'disabled',
description : 'Build HTML documentation.'
)
option(
'html-docs-path',
type : 'string',
value : '',
description : 'Location to install HTML documentation. Default: $datadir/doc/mesa.'
)
option(
'selinux',
type : 'boolean',
deprecated : true,
description : 'Does nothing, left here for a while to avoid build breakages.',
)
option(
'execmem',
type : 'boolean',
deprecated : true,
description : 'Does nothing, left here for a while to avoid build breakages.',
)
option(
'osmesa',
type : 'boolean',
value : false,
description : 'Build OSmesa.'
)
option(
'tools',
type : 'array',
value : [],
choices : ['drm-shim', 'etnaviv', 'freedreno', 'glsl', 'intel', 'intel-ui',
'nir', 'nouveau', 'lima', 'panfrost', 'asahi', 'imagination',
'all', 'dlclose-skip'],
description : 'List of tools to build. (Note: `intel-ui` selects `intel`)',
)
option(
'power8',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Enable power8 optimizations.',
)
vulkan: Add EXT_acquire_xlib_display [v5] This extension adds the ability to borrow an X RandR output for temporary use directly by a Vulkan application. For DRM, we use the Linux resource leasing mechanism. v2: Clean up xlib_lease detection * Use separate temporary '_xlib_lease' variable to hold the option value to avoid changin the type of a variable. * Use boolean expressions instead of additional if statements to compute resulting with_xlib_lease value. * Simplify addition of VK_USE_PLATFORM_XLIB_XRANDR_KHR to vulkan_wsi_args Suggested-by: Eric Engestrom <eric.engestrom@imgtec.com> Move mode list from wsi_display to wsi_display_connector Fix scope for wsi_display_mode and wsi_display_connector allocs Suggested-by: Jason Ekstrand <jason@jlekstrand.net> v3: Adopt Jason Ekstrand's coding conventions Declare variables at first use, eliminate extra whitespace between types and names. Wrap lines to 80 columns. Explicitly forbid multiple DRM leases. Making the code support this looks tricky and will require additional thought. Use xcb_randr_output_t throughout the internals of the implementation. Convert at the public API (wsi_get_randr_output_display). Clean up check for usable active_crtc (possible when only the desired output is connected to the crtc). Suggested-by: Jason Ekstrand <jason.ekstrand@intel.com> v4: Move output resource fetching closer to use in wsi_display_get_output. This simplifies the error returns in earlier parts of the code a bit. Return VK_ERROR_INITIALIZATION_FAILED from wsi_acquire_xlib_display. Jason says this is the right error message. Suggested-by: Jason Ekstrand <jason.ekstrand@intel.com> v5: randr doesn't pass vscan over the wire, so we set vscan to 0 for randr-acquired modes, and test wsi modes for vscan <= 1 when comparing against randr modes. Suggested-by: Jason Ekstrand <jason.ekstrand@intel.com> Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-02-09 23:45:58 +08:00
option(
'xlib-lease',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
vulkan: Add EXT_acquire_xlib_display [v5] This extension adds the ability to borrow an X RandR output for temporary use directly by a Vulkan application. For DRM, we use the Linux resource leasing mechanism. v2: Clean up xlib_lease detection * Use separate temporary '_xlib_lease' variable to hold the option value to avoid changin the type of a variable. * Use boolean expressions instead of additional if statements to compute resulting with_xlib_lease value. * Simplify addition of VK_USE_PLATFORM_XLIB_XRANDR_KHR to vulkan_wsi_args Suggested-by: Eric Engestrom <eric.engestrom@imgtec.com> Move mode list from wsi_display to wsi_display_connector Fix scope for wsi_display_mode and wsi_display_connector allocs Suggested-by: Jason Ekstrand <jason@jlekstrand.net> v3: Adopt Jason Ekstrand's coding conventions Declare variables at first use, eliminate extra whitespace between types and names. Wrap lines to 80 columns. Explicitly forbid multiple DRM leases. Making the code support this looks tricky and will require additional thought. Use xcb_randr_output_t throughout the internals of the implementation. Convert at the public API (wsi_get_randr_output_display). Clean up check for usable active_crtc (possible when only the desired output is connected to the crtc). Suggested-by: Jason Ekstrand <jason.ekstrand@intel.com> v4: Move output resource fetching closer to use in wsi_display_get_output. This simplifies the error returns in earlier parts of the code a bit. Return VK_ERROR_INITIALIZATION_FAILED from wsi_acquire_xlib_display. Jason says this is the right error message. Suggested-by: Jason Ekstrand <jason.ekstrand@intel.com> v5: randr doesn't pass vscan over the wire, so we set vscan to 0 for randr-acquired modes, and test wsi modes for vscan <= 1 when comparing against randr modes. Suggested-by: Jason Ekstrand <jason.ekstrand@intel.com> Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-02-09 23:45:58 +08:00
description : 'Enable VK_EXT_acquire_xlib_display.'
)
option(
'glx-direct',
type : 'boolean',
value : true,
description : 'Enable direct rendering in GLX and EGL for DRI',
)
option('egl-lib-suffix',
type : 'string',
value : '',
description : 'Suffix to append to EGL library name. Default: none.'
)
option(
'gles-lib-suffix',
type : 'string',
value : '',
description : 'Suffix to append to GLES library names. Default: none.'
)
option(
'platform-sdk-version',
type : 'integer',
min : 25,
max : 10000,
value : 25,
description : 'Android Platform SDK version. Default: Nougat version.'
)
option(
'allow-kcmp',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Allow using KCMP_FILE to compare file descriptions. ' +
'auto = allowed everywhere except on Android'
)
option(
'zstd',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Use ZSTD instead of ZLIB in some cases.'
)
option(
'zlib',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
value : 'enabled',
description : 'Use ZLIB to build driver. Default: enabled'
)
option(
'sse2',
type : 'boolean',
value : true,
Default enable SSE2 on mesa builds. With the idea of branching classic device support in to its own tree now would be a good time to also raise the minimum requirements to something that is more "modern" on x86. SSE2 was introduced in 2000(!) by default let's make it the minimum spec now All the old hardware that is moving to the maintenance branch will finally be out of the way. For the 64-bit side of the discussion there isn't much changed. * GCC already enables -msse and -msse2 by default * Same with clang * fpmath=sse might remove some extraneous x87 usage ** Clang implies fpmath=sse ALWAYS For the 32-bit side of things is where the exciting details change * GCC by default doesn't enable sse1 or sse2 ** Does all `float`, `double`, and `long double` math with x87 ** -msse2 enables sse2 and sse1, gcc still uses x87 even with those enabled ** -mfpmath=sse moves away from using x87 and instead uses sse1 and sse2 * Clang already default enables sse1/sse2 which then turns on their implied fpmath=sse What does this mean for users? On Linux raises the default minimum processor spec to SSE2 supporting CPUs * Intel requirements raise from P5 (1993) to Netburst (2000) * AMD requirements raise from Athlon(1999/2000) to Athlon 64 (2003) * Via requirements raise from C3(2001) to C7 (2005) What does it mean for package maintainers? For x86-64 distributions that have i386/i686 multilib, then nothing changes. You're already on a platform guaranteed to support SSE2. For i386/i686 distributions they will need to weigh their min spec against this. Not sure how many still support classic processors. Who is left out in the cold? * Intel Quark (2013) ** Embedded board, doesn't have a GPU, Technically has 1x PCIe 2.0 lane that someone could plug a GPU in to * Some older transmeta CPUs, but they had a followup that also had SSE2. ** Anyone hacking on these with a modern GPU? I'm guessing they know how to turn this option off Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com> Reviewed-by: Adam Jackson <ajax@redhat.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9868>
2021-03-27 07:25:01 +08:00
description : 'use msse2 flag for x86. Uses sse/sse2 instead of x87. Default: true',
)
option(
'perfetto',
type : 'boolean',
value : false,
description : 'Enable performance analysis with Perfetto. Default: false'
)
option(
'datasources',
type : 'array',
value : ['auto'],
choices : ['auto', 'panfrost', 'intel', 'freedreno'],
description : 'List of Perfetto datasources to build. If this is set to ' +
'`auto`, datasources that can not be build are skipped. ' +
'Default: [`auto`]'
)
option(
'teflon',
type : 'boolean',
value : false,
description : 'Enable TensorFlow Lite delegate. Default: false'
)
option(
'gpuvis',
type : 'boolean',
value : false,
description : 'Enable tracing markers for gpuvis. Default: false'
)
option(
'custom-shader-replacement',
type : 'string',
value : '',
description : 'Enable a custom shader replacement mechanism. Note that ' +
'enabling this option requires adding/generating a ' +
'shader_replacement.h file that can be included (see ' +
'shaderapi.c).'
)
option(
'vmware-mks-stats',
type : 'boolean',
value : false,
description : 'Build gallium VMware/svga driver with mksGuestStats ' +
'instrumentation.'
)
option(
'vulkan-beta',
type : 'boolean',
value : false,
description : 'Build vulkan drivers with BETA extensions enabled.'
)
option(
'intel-clc',
type : 'combo',
deprecated: {'true': 'enabled'},
value : 'auto',
choices : [
'enabled', 'system', 'auto'
],
description : 'Build the intel-clc compiler or use a system version.'
)
option(
'install-intel-clc',
type : 'boolean',
value : false,
description : 'Install the intel-clc compiler (if needed for cross builds).'
)
option(
'intel-rt',
type : 'feature',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build Ray Tracing on supported hardware.'
)
option(
'video-codecs',
type : 'array',
value : ['all_free'],
choices: [
'all', 'all_free', 'vc1dec', 'h264dec', 'h264enc', 'h265dec', 'h265enc', 'av1dec', 'av1enc', 'vp9dec'
],
description : 'List of codecs to build support for. ' +
'Distros might want to consult their legal department before ' +
'enabling these. This is used for all video APIs (vaapi, ' +
'vdpau, vulkan). Non-patent encumbered codecs will be ' +
'enabled by default with the all_free default value.'
)
option(
'gallium-d3d12-video',
type : 'feature',
value : 'auto',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'build gallium d3d12 with video support.',
)
option(
'gallium-d3d12-graphics',
type : 'feature',
value : 'auto',
description : 'build gallium d3d12 with graphics pipeline support.',
)
option(
'radv-build-id',
type : 'string',
value : '',
description : 'Override build id for shader cache keys (hex string). ' +
'Can be extracted with readelf -x .note.gnu.build-id'
)
option(
'min-windows-version',
type : 'integer',
min : 7,
max : 11,
value : 8,
description : 'Minimum Windows version to support. Defaults to Windows 8.'
)
option(
'xmlconfig',
type : 'feature',
value : 'auto',
deprecated: {'true': 'enabled', 'false': 'disabled'},
description : 'Build custom xmlconfig (driconf) support. If disabled, ' +
'the default driconf file is hardcoded into Mesa. ' +
'Requires expat.'
)
option(
'legacy-x11',
type : 'array',
value : ['none'],
description : 'Build legacy X11 support features.',
choices : [
'none', 'dri2'
],
)