[Mesa-dev] [PATCH v2 1/4] meson: Build SWR driver
Jan Vesely
jan.vesely at rutgers.edu
Wed Dec 13 19:32:40 UTC 2017
On Wed, 2017-12-13 at 09:47 -0800, Dylan Baker wrote:
> This enables the SWR driver, but doesn't actually hook it up to any of
> the targets yet. I felt like this patch was big and complicated enough
> without adding that.
>
> v2: - Fix typo 'delemeited' -> 'delimited' (Eric E)
> - Fix type 'errror' -> 'error' (Eric E)
> - Use variables to hold files instead of looking above the current
> meson build (Eric E)
> - Use foreach loops to reduce the number of unique generators
> - Add comment about why some generators have names and some are just
> added to a list
>
> CC: George Kyriazis <george.kyriazis at intel.com>
> Signed-off-by: Dylan Baker <dylanx.c.baker at intel.com>
> ---
> meson.build | 12 +-
> meson_options.txt | 6 +
> src/gallium/drivers/swr/meson.build | 289 +++++++++++++++++++++
> .../drivers/swr/rasterizer/codegen/meson.build | 158 +++++++++++
> src/gallium/meson.build | 8 +
> 5 files changed, 467 insertions(+), 6 deletions(-)
> create mode 100644 src/gallium/drivers/swr/meson.build
> create mode 100644 src/gallium/drivers/swr/rasterizer/codegen/meson.build
>
> diff --git a/meson.build b/meson.build
> index 6e5ae4d24e9..842d441199e 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -47,6 +47,7 @@ with_valgrind = get_option('valgrind')
> with_libunwind = get_option('libunwind')
> with_asm = get_option('asm')
> with_osmesa = get_option('osmesa')
> +with_swr_arches = get_option('swr-arches').split(',')
> if get_option('texture-float')
> pre_args += '-DTEXTURE_FLOAT_ENABLED'
> message('WARNING: Floating-point texture enabled. Please consult docs/patents.txt and your lawyer before building mesa.')
> @@ -155,6 +156,7 @@ if _drivers != ''
> with_gallium_i915 = _split.contains('i915')
> with_gallium_svga = _split.contains('svga')
> with_gallium_virgl = _split.contains('virgl')
> + with_gallium_swr = _split.contains('swr')
> with_gallium = true
> endif
>
> @@ -181,7 +183,7 @@ if _vulkan_drivers != ''
> with_any_vk = with_amd_vk or with_intel_vk
> endif
>
> -if with_dri_swrast and with_gallium_softpipe
> +if with_dri_swrast and (with_gallium_softpipe or with_gallium_swr)
> error('Only one swrast provider can be built')
> endif
> if with_dri_i915 and with_gallium_i915
> @@ -975,7 +977,7 @@ _llvm = get_option('llvm')
> if _llvm == 'auto'
> dep_llvm = dependency(
> 'llvm', version : '>= 3.9.0', modules : llvm_modules,
> - required : with_amd_vk or with_gallium_radeonsi,
> + required : with_amd_vk or with_gallium_radeonsi or with_gallium_swr,
> )
> with_llvm = dep_llvm.found()
> elif _llvm == 'true'
> @@ -997,8 +999,8 @@ if with_llvm
> '-DHAVE_LLVM=0x0 at 0@@1@@2@'.format(_llvm_version[0], _llvm_version[1], _llvm_patch),
> '-DMESA_LLVM_VERSION_PATCH=@0@'.format(_llvm_patch),
> ]
> -elif with_amd_vk or with_gallium_radeonsi
> - error('The following drivers requires LLVM: Radv, RadeonSI. One of these is enabled, but LLVM is disabled.')
> +elif with_amd_vk or with_gallium_radeonsi or with_gallium_swr
> + error('The following drivers requires LLVM: Radv, RadeonSI, SWR. One of these is enabled, but LLVM is disabled.')
> endif
>
> dep_glvnd = []
> @@ -1158,8 +1160,6 @@ endif
>
> # TODO: various libdirs
>
> -# TODO: swr
> -
> # TODO: gallium driver dirs
>
> # FIXME: this is a workaround for #2326
> diff --git a/meson_options.txt b/meson_options.txt
> index 39b137cbeaf..4f4db5b7d26 100644
> --- a/meson_options.txt
> +++ b/meson_options.txt
> @@ -261,3 +261,9 @@ option(
> choices : ['8', '16', '32'],
> description : 'Number of channel bits for OSMesa.'
> )
> +option(
> + 'swr-arches',
> + type : 'string',
> + value : 'avx,avx2',
> + description : 'Comma delemited swr architectures. choices : avx,avx2,knl,skx'
> +)
> diff --git a/src/gallium/drivers/swr/meson.build b/src/gallium/drivers/swr/meson.build
> new file mode 100644
> index 00000000000..c8c69b096a6
> --- /dev/null
> +++ b/src/gallium/drivers/swr/meson.build
> @@ -0,0 +1,289 @@
> +# Copyright © 2017 Intel Corporation
> +
> +# Permission is hereby granted, free of charge, to any person obtaining a copy
> +# of this software and associated documentation files (the "Software"), to deal
> +# in the Software without restriction, including without limitation the rights
> +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> +# copies of the Software, and to permit persons to whom the Software is
> +# furnished to do so, subject to the following conditions:
> +
> +# The above copyright notice and this permission notice shall be included in
> +# all copies or substantial portions of the Software.
> +
> +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
> +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> +# SOFTWARE.
> +
> +files_swr_common = files(
> + 'rasterizer/common/formats.cpp',
> + 'rasterizer/common/formats.h',
> + 'rasterizer/common/intrin.h',
> + 'rasterizer/common/isa.hpp',
> + 'rasterizer/common/os.cpp',
> + 'rasterizer/common/os.h',
> + 'rasterizer/common/rdtsc_buckets.cpp',
> + 'rasterizer/common/rdtsc_buckets.h',
> + 'rasterizer/common/rdtsc_buckets_shared.h',
> + 'rasterizer/common/rdtsc_buckets_shared.h',
> + 'rasterizer/common/simd16intrin.h',
> + 'rasterizer/common/simdintrin.h',
> + 'rasterizer/common/simdlib.hpp',
> + 'rasterizer/common/simdlib_interface.hpp',
> + 'rasterizer/common/simdlib_types.hpp',
> + 'rasterizer/common/swr_assert.cpp',
> + 'rasterizer/common/swr_assert.h',
> +)
> +
> +files_swr_mesa = files(
> + 'swr_loader.cpp',
> + 'swr_clear.cpp',
> + 'swr_context.cpp',
> + 'swr_context.h',
> + 'swr_draw.cpp',
> + 'swr_public.h',
> + 'swr_resource.h',
> + 'swr_screen.cpp',
> + 'swr_screen.h',
> + 'swr_state.cpp',
> + 'swr_state.h',
> + 'swr_tex_sample.cpp',
> + 'swr_tex_sample.h',
> + 'swr_scratch.h',
> + 'swr_scratch.cpp',
> + 'swr_shader.cpp',
> + 'swr_shader.h',
> + 'swr_memory.h',
> + 'swr_fence.h',
> + 'swr_fence.cpp',
> + 'swr_fence_work.h',
> + 'swr_fence_work.cpp',
> + 'swr_query.h',
> + 'swr_query.cpp',
> + 'rasterizer/jitter/blend_jit.cpp',
> + 'rasterizer/jitter/blend_jit.h',
> + 'rasterizer/jitter/builder.cpp',
> + 'rasterizer/jitter/builder.h',
> + 'rasterizer/jitter/builder_math.h',
> + 'rasterizer/jitter/builder_misc.cpp',
> + 'rasterizer/jitter/builder_misc.h',
> + 'rasterizer/jitter/fetch_jit.cpp',
> + 'rasterizer/jitter/fetch_jit.h',
> + 'rasterizer/jitter/jit_api.h',
> + 'rasterizer/jitter/JitManager.cpp',
> + 'rasterizer/jitter/JitManager.h',
> + 'rasterizer/jitter/streamout_jit.cpp',
> + 'rasterizer/jitter/streamout_jit.h',
> +)
> +
> +files_swr_arch = files(
> + 'rasterizer/archrast/archrast.cpp',
> + 'rasterizer/archrast/archrast.h',
> + 'rasterizer/archrast/eventmanager.h',
> + 'rasterizer/core/api.cpp',
> + 'rasterizer/core/api.h',
> + 'rasterizer/core/arena.h',
> + 'rasterizer/core/backend.cpp',
> + 'rasterizer/core/backend_clear.cpp',
> + 'rasterizer/core/backend_sample.cpp',
> + 'rasterizer/core/backend_singlesample.cpp',
> + 'rasterizer/core/backend.h',
> + 'rasterizer/core/backend_impl.h',
> + 'rasterizer/core/binner.cpp',
> + 'rasterizer/core/binner.h',
> + 'rasterizer/core/blend.h',
> + 'rasterizer/core/clip.cpp',
> + 'rasterizer/core/clip.h',
> + 'rasterizer/core/conservativeRast.h',
> + 'rasterizer/core/context.h',
> + 'rasterizer/core/depthstencil.h',
> + 'rasterizer/core/fifo.hpp',
> + 'rasterizer/core/format_conversion.h',
> + 'rasterizer/core/format_traits.h',
> + 'rasterizer/core/format_types.h',
> + 'rasterizer/core/format_utils.h',
> + 'rasterizer/core/frontend.cpp',
> + 'rasterizer/core/frontend.h',
> + 'rasterizer/core/knobs.h',
> + 'rasterizer/core/knobs_init.h',
> + 'rasterizer/core/multisample.h',
> + 'rasterizer/core/pa_avx.cpp',
> + 'rasterizer/core/pa.h',
> + 'rasterizer/core/rasterizer.cpp',
> + 'rasterizer/core/rasterizer.h',
> + 'rasterizer/core/rasterizer_impl.h',
> + 'rasterizer/core/rdtsc_core.cpp',
> + 'rasterizer/core/rdtsc_core.h',
> + 'rasterizer/core/ringbuffer.h',
> + 'rasterizer/core/state.h',
> + 'rasterizer/core/state_funcs.h',
> + 'rasterizer/core/tessellator.h',
> + 'rasterizer/core/threads.cpp',
> + 'rasterizer/core/threads.h',
> + 'rasterizer/core/tilemgr.cpp',
> + 'rasterizer/core/tilemgr.h',
> + 'rasterizer/core/utils.h',
> + 'rasterizer/memory/ClearTile.cpp',
> + 'rasterizer/memory/Convert.h',
> + 'rasterizer/memory/LoadTile.cpp',
> + 'rasterizer/memory/LoadTile.h',
> + 'rasterizer/memory/LoadTile_Linear.cpp',
> + 'rasterizer/memory/LoadTile_TileX.cpp',
> + 'rasterizer/memory/LoadTile_TileY.cpp',
> + 'rasterizer/memory/StoreTile.cpp',
> + 'rasterizer/memory/StoreTile.h',
> + 'rasterizer/memory/StoreTile_Linear2.cpp',
> + 'rasterizer/memory/StoreTile_Linear.cpp',
> + 'rasterizer/memory/StoreTile_TileW.cpp',
> + 'rasterizer/memory/StoreTile_TileX2.cpp',
> + 'rasterizer/memory/StoreTile_TileX.cpp',
> + 'rasterizer/memory/StoreTile_TileY2.cpp',
> + 'rasterizer/memory/StoreTile_TileY.cpp',
> + 'rasterizer/memory/TilingFunctions.h',
> + 'rasterizer/memory/tilingtraits.h',
> +)
> +
> +swr_context_files = files('swr_context.h')
> +swr_state_files = files('rasterizer/core/state.h')
> +swr_event_proto_files = files('rasterizer/archrast/events.proto')
> +subdir('rasterizer/codegen')
> +
> +swr_incs = include_directories(
> + 'rasterizer/codegen', 'rasterizer/core', 'rasterizer/jitter',
> + 'rasterizer/archrast', 'rasterizer',
> +)
> +
> +swr_cpp_args = [cpp_vis_args]
> +if cpp.has_argument('-fno-strict-aliasing')
> + swr_cpp_args += '-fno-strict-aliasing'
> +endif
> +
> +swr_arch_libs = []
> +swr_arch_defines = []
> +
> +swr_avx_args = cpp.first_supported_argument(
> + '-target-cpu=sandybridge', '-mavx', '-march=core-avx', '-tp=sandybridge',
> + prefix : '''
> + #if !defined(__AVX__)
> + # error
> + #endif ''',
> +)
> +if swr_avx_args == []
> + error('Cannot find AVX support for swr. (these are required for SWR an all architectures.)')
> +endif
> +if with_swr_arches.contains('avx')
> + swr_arch_defines += '-DHAVE_SWR_AVX'
> + swr_arch_libs += shared_library(
> + 'swrAVX',
> + files_swr_common,
> + cpp_args : [swr_cpp_args, swr_avx_args, '-DKNOB_ARCH=KNOB_ARCH_AVX'],
> + link_args : [ld_args_gc_sections],
> + include_directories : [swr_incs],
> + dependencies : [dep_thread, dep_llvm],
> + install : true,
> + )
> +endif
> +
> +if with_swr_arches.contains('avx2')
> + swr_avx2_args = cpp.first_supported_argument(
> + '-target-cpu=haswell', '-march=core-avx2', '-tp=haswell',
> + prefix : '''
> + #if !defined(__AVX2__)
> + # error
> + #endif ''',
> + )
> + if swr_avx2_args == []
> + if cpp.has_argument(['-mavx2', '-mfma', '-mbmi2', '-mf16c'],
> + prefix : '''
> + #if !defined(__AVX2__)
> + # error
> + #endif ''')
> + swr_avx2_args = ['-mavx2', '-mfma', '-mbmi2', '-mf16c']
> + else
> + error('Cannot find AVX2 support for swr.')
> + endif
> + endif
> +
> + swr_arch_defines += '-DHAVE_SWR_AVX2'
> + swr_arch_libs += shared_library(
> + 'swrAVX2',
> + files_swr_common,
> + cpp_args : [swr_cpp_args, swr_avx2_args, '-DKNOB_ARCH=KNOB_ARCH_AVX2'],
> + link_args : [ld_args_gc_sections],
> + include_directories : [swr_incs],
> + dependencies : [dep_thread, dep_llvm],
> + install : true,
> + )
> +endif
> +
> +if with_swr_arches.contains('knl')
> + swr_knl_args = cpp.first_supported_argument(
> + '-target-cpu=mic-knl', '-march=knl', '-xMIC-AVX512',
> + prefix : '''
> + #if !defined(__AVX512F__) || !defined(__AVX512ER__)
> + # error
> + #endif ''',
> + )
> + if swr_knl_args == []
> + error('Cannot find KNL support for swr.')
> + endif
> +
> + swr_arch_defines += '-DHAVE_SWR_KNL'
> + swr_arch_libs += shared_library(
> + 'swrKNL',
> + files_swr_common,
> + cpp_args : [
> + swr_cpp_args, swr_knl_args, '-DKNOB_ARCH=KNOB_ARCH_AVX512',
> + '-DKNOB_ARCH_KNIGHTS',
> + ],
> + link_args : [ld_args_gc_sections],
> + include_directories : [swr_incs],
> + dependencies : [dep_thread, dep_llvm],
> + install : true,
> + )
> +endif
> +
> +if with_swr_arches.contains('skx')
> + swr_skx_args = cpp.first_supported_argument(
> + '-target-cpu=x86-skylake', '-march=skylake-avx512', '-xCORE-AVX512',
> + prefix : '''
> + #if !defined(__AVX512F__) || !defined(__AVX512BW__)
> + # error
> + #endif ''',
> + )
> + if swr_skx_args == []
> + error('Cannot find SKX support for swr.')
> + endif
> +
> + swr_arch_defines += '-DHAVE_SWR_SKX'
> + swr_arch_libs += shared_library(
> + 'swrSKX',
> + files_swr_common,
> + cpp_args : [swr_cpp_args, swr_skx_args, '-DKNOB_ARCH=KNOB_ARCH_AVX512'],
> + link_args : [ld_args_gc_sections],
> + include_directories : [swr_incs],
> + dependencies : [dep_thread, dep_llvm],
> + install : true,
> + )
> +endif
> +
> +if swr_arch_libs == []
> + error('SWR configured, but no SWR architectures configured')
> +endif
> +
> +# The swr_avx_args are needed for intrensic usage in swr api headers.
> +libmesaswr = static_library(
> + 'mesaswr',
> + [files_swr_mesa, files_swr_common, gen_knobs_h, gen_knobs_cpp,
> + gen_builder_hpp, gen_builder_x86_hpp],
> + cpp_args : [cpp_vis_args, swr_cpp_args, swr_avx_args, swr_arch_defines],
> + include_directories : [inc_common, swr_incs],
> +)
> +
> +driver_swr = declare_dependency(
> + compile_args : '-DGALLIUM_SWR',
> + link_with : libmesaswr,
> +)
> diff --git a/src/gallium/drivers/swr/rasterizer/codegen/meson.build b/src/gallium/drivers/swr/rasterizer/codegen/meson.build
> new file mode 100644
> index 00000000000..89baf483043
> --- /dev/null
> +++ b/src/gallium/drivers/swr/rasterizer/codegen/meson.build
> @@ -0,0 +1,158 @@
> +# Copyright © 2017 Intel Corporation
> +
> +# Permission is hereby granted, free of charge, to any person obtaining a copy
> +# of this software and associated documentation files (the "Software"), to deal
> +# in the Software without restriction, including without limitation the rights
> +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> +# copies of the Software, and to permit persons to whom the Software is
> +# furnished to do so, subject to the following conditions:
> +
> +# The above copyright notice and this permission notice shall be included in
> +# all copies or substantial portions of the Software.
> +
> +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
> +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> +# SOFTWARE.
> +
> +gen_knobs_cpp = custom_target(
> + 'gen_knobs.cpp',
> + input : ['gen_knobs.py'],
> + output : 'gen_knobs.cpp',
> + command : [prog_python2, '@INPUT0@', '--output', '@OUTPUT@', '--gen_cpp'],
> + depend_files : files(
> + 'knob_defs.py', 'gen_common.py',
> + 'templates/gen_knobs.cpp',
> + ),
> +)
> +
> +gen_knobs_h = custom_target(
> + 'gen_knobs.h',
> + input : ['gen_knobs.py'],
> + output : 'gen_knobs.h',
> + command : [prog_python2, '@INPUT0@', '--output', '@OUTPUT@', '--gen_h'],
> + depend_files : files(
> + 'knob_defs.py', 'gen_common.py',
> + 'templates/gen_knobs.h',
> + ),
> +)
> +
> +gen_builder_hpp = custom_target(
> + 'gen_builder.hpp',
> + input : [
> + 'gen_llvm_ir_macros.py',
the above line ^^^ adds a whitespace error (git am complains)
Jan
> + join_paths(
> + dep_llvm.get_configtool_variable('includedir'), 'llvm', 'IR',
> + 'IRBuilder.h'
> + )
> + ],
> + output : 'gen_builder.hpp',
> + command : [
> + prog_python2, '@INPUT0@', '--input', '@INPUT1@', '--output', '@OUTPUT@',
> + '--gen_h', '--output-dir', meson.current_build_dir()
> + ],
> + depend_files : files(
> + 'templates/gen_builder.hpp',
> + 'gen_common.py',
> + ),
> + build_by_default : true,
> +)
> +
> +gen_builder_x86_hpp = custom_target(
> + 'gen_builder_x86.hpp',
> + input : 'gen_llvm_ir_macros.py',
> + output : 'gen_builder_x86.hpp',
> + command : [
> + prog_python2, '@INPUT0@', '--gen_x86_h', '--output', '@OUTPUT@',
> + '--output-dir', meson.current_build_dir()
> + ],
> + depend_files : files(
> + 'templates/gen_builder.hpp',
> + 'gen_common.py',
> + ),
> +)
> +
> +# The generators above this are needed individually, while the below generators
> +# are all inputs to the same lib, so they don't need unique names.
> +files_swr_common += [
> + gen_builder_hpp, gen_builder_x86_hpp, gen_knobs_h, gen_knobs_cpp
> +]
> +
> +foreach x : [[swr_context_files, 'gen_swr_context_llvm.h'],
> + [swr_state_files, 'gen_state_llvm.h']]
> + files_swr_common += custom_target(
> + x[1],
> + input : ['gen_llvm_types.py', x[0]],
> + output : x[1],
> + command : [prog_python2, '@INPUT0@', '--input', '@INPUT1@', '--output', '@OUTPUT@'],
> + depend_files : files(
> + 'templates/gen_llvm.hpp',
> + 'gen_common.py',
> + ),
> + )
> +endforeach
> +
> +foreach x : [['gen_ar_event.hpp', '--gen_event_hpp'],
> + ['gen_ar_event.cpp', '--gen_event_cpp'],
> + ['gen_ar_eventhandler.hpp', '--gen_eventhandler_h'],
> + ['gen_ar_eventhandlerfile.hpp', '--gen_eventhandlerfile_h']]
> + files_swr_common += custom_target(
> + x[0],
> + input : ['gen_archrast.py', swr_event_proto_files],
> + output : x[0],
> + command : [
> + prog_python2, '@INPUT0@', '--proto', '@INPUT1@', '--output', '@OUTPUT@',
> + x[1],
> + ],
> + depend_files : files(
> + join_paths('templates', x[0]),
> + 'gen_common.py',
> + ),
> + )
> +endforeach
> +
> +files_swr_common += custom_target(
> + 'gen_backend_pixel',
> + input : 'gen_backends.py',
> + output : [
> + 'gen_BackendPixelRate0.cpp', 'gen_BackendPixelRate1.cpp',
> + 'gen_BackendPixelRate2.cpp', 'gen_BackendPixelRate3.cpp',
> + 'gen_BackendPixelRate.hpp',
> + ],
> + command : [
> + prog_python2, '@INPUT@',
> + '--outdir', meson.current_build_dir(),
> + '--dim', '5', '2', '3', '2', '2', '2',
> + '--numfiles', '4',
> + '--cpp', '--hpp',
> + ],
> + depend_files : files(
> + 'templates/gen_backend.cpp',
> + 'templates/gen_header_init.hpp',
> + ),
> +)
> +
> +files_swr_common += custom_target(
> + 'gen_backend_raster',
> + input : 'gen_backends.py',
> + output : [
> + 'gen_rasterizer0.cpp', 'gen_rasterizer1.cpp',
> + 'gen_rasterizer2.cpp', 'gen_rasterizer3.cpp',
> + 'gen_rasterizer.hpp',
> + ],
> + command : [
> + prog_python2, '@INPUT@',
> + '--outdir', meson.current_build_dir(),
> + '--rast',
> + '--dim', '5', '2', '2', '3', '5', '2',
> + '--numfiles', '4',
> + '--cpp', '--hpp',
> + ],
> + depend_files : files(
> + 'templates/gen_rasterizer.cpp',
> + 'templates/gen_header_init.hpp',
> + ),
> +)
> diff --git a/src/gallium/meson.build b/src/gallium/meson.build
> index 2baca8a97ca..3e2fd095710 100644
> --- a/src/gallium/meson.build
> +++ b/src/gallium/meson.build
> @@ -32,6 +32,14 @@ subdir('winsys/sw/null')
> subdir('winsys/sw/dri')
> subdir('winsys/sw/kms-dri')
> subdir('winsys/sw/wrapper')
> +if with_gallium_swr
> + if meson.version().version_compare('< 0.44.0')
> + error('SWR requires meson 0.44.0 or greater.')
> + endif
> + subdir('drivers/swr')
> +else
> + driver_swr = declare_dependency()
> +endif
> if with_gallium_softpipe
> subdir('drivers/softpipe')
> if with_llvm
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