meson: Build with Python 3

Now that all the build scripts are compatible with both Python 2 and 3,
we can flip the switch and tell Meson to use the latter.

Since Meson already depends on Python 3 anyway, this means we don't need
two different Python stacks to build Mesa.

Signed-off-by: Mathieu Bridon <[email protected]>
Reviewed-by: Eric Engestrom <[email protected]>
Reviewed-by: Dylan Baker <[email protected]>

30 files changed, 74 insertions, 74 deletions

diff --git a/src/amd/common/meson.build b/src/amd/common/meson.build
index 0967b1adb76..6827a020947 100644
--- a/src/amd/common/meson.build
+++ b/src/amd/common/meson.build
@@ -22,7 +22,7 @@ sid_tables_h = custom_target(
   'sid_tables_h',
   input : ['sid_tables.py', 'sid.h', 'gfx9d.h'],
   output : 'sid_tables.h',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
 )
 
diff --git a/src/amd/vulkan/meson.build b/src/amd/vulkan/meson.build
index 9f2842182e7..9ceaeb6f002 100644
--- a/src/amd/vulkan/meson.build
+++ b/src/amd/vulkan/meson.build
@@ -23,7 +23,7 @@ radv_entrypoints = custom_target(
   input : ['radv_entrypoints_gen.py', vk_api_xml],
   output : ['radv_entrypoints.h', 'radv_entrypoints.c'],
   command : [
-    prog_python2, '@INPUT0@', '--xml', '@INPUT1@', '--outdir',
+    prog_python, '@INPUT0@', '--xml', '@INPUT1@', '--outdir',
     meson.current_build_dir()
   ],
   depend_files : files('radv_extensions.py'),
@@ -34,7 +34,7 @@ radv_extensions_c = custom_target(
   input : ['radv_extensions.py', vk_api_xml],
   output : ['radv_extensions.c', 'radv_extensions.h'],
   command : [
-    prog_python2, '@INPUT0@', '--xml', '@INPUT1@', '--out-c', '@OUTPUT0@',
+    prog_python, '@INPUT0@', '--xml', '@INPUT1@', '--out-c', '@OUTPUT0@',
     '--out-h', '@OUTPUT1@'
   ],
 )
@@ -43,7 +43,7 @@ vk_format_table_c = custom_target(
   'vk_format_table.c',
   input : ['vk_format_table.py', 'vk_format_layout.csv'],
   output : 'vk_format_table.c',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   depend_files : files('vk_format_parse.py'),
   capture : true,
 )
@@ -153,7 +153,7 @@ radeon_icd = custom_target(
   input : 'radv_icd.py',
   output : 'radeon_icd.@[email protected]'.format(host_machine.cpu()),
   command : [
-    prog_python2, '@INPUT@',
+    prog_python, '@INPUT@',
     '--lib-path', join_paths(get_option('prefix'), get_option('libdir')),
     '--out', '@OUTPUT@',
   ],
@@ -168,7 +168,7 @@ radv_dev_icd = custom_target(
   input : 'radv_icd.py',
   output : 'dev_icd.json',
   command : [
-    prog_python2, '@INPUT@', '--lib-path', meson.current_build_dir(),
+    prog_python, '@INPUT@', '--lib-path', meson.current_build_dir(),
     '--out', '@OUTPUT@'
   ],
   depend_files : files('radv_extensions.py'),
diff --git a/src/broadcom/cle/meson.build b/src/broadcom/cle/meson.build
index 983896737a7..afaf5a1b4f5 100644
--- a/src/broadcom/cle/meson.build
+++ b/src/broadcom/cle/meson.build
@@ -40,7 +40,7 @@ foreach _v : v3d_versions
     _name,
     input : ['gen_pack_header.py', f],
     output : _name,
-    command : [prog_python2, '@INPUT@', '@0@'.format(v)],
+    command : [prog_python, '@INPUT@', '@0@'.format(v)],
     capture : true,
   )
 endforeach
@@ -49,7 +49,7 @@ v3d_xml_h = custom_target(
   'v3d_xml.h',
   input : ['../../intel/genxml/gen_zipped_file.py', v3d_xml_files],
   output : 'v3d_xml.h',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
 )
 
diff --git a/src/compiler/glsl/meson.build b/src/compiler/glsl/meson.build
index df1c086671d..7e4dd2929a3 100644
--- a/src/compiler/glsl/meson.build
+++ b/src/compiler/glsl/meson.build
@@ -41,7 +41,7 @@ ir_expression_operation_constant_h = custom_target(
   'ir_expression_operation_constant.h',
   input : 'ir_expression_operation.py',
   output : 'ir_expression_operation_constant.h',
-  command : [prog_python2, '@INPUT@', 'constant'],
+  command : [prog_python, '@INPUT@', 'constant'],
   capture : true,
 )
 
@@ -49,7 +49,7 @@ ir_expression_operation_strings_h = custom_target(
   'ir_expression_operation_strings.h',
   input : 'ir_expression_operation.py',
   output : 'ir_expression_operation_strings.h',
-  command : [prog_python2, '@INPUT@', 'strings'],
+  command : [prog_python, '@INPUT@', 'strings'],
   capture : true,
 )
 
diff --git a/src/compiler/meson.build b/src/compiler/meson.build
index 60b633832d4..0f8f3c12966 100644
--- a/src/compiler/meson.build
+++ b/src/compiler/meson.build
@@ -40,7 +40,7 @@ ir_expression_operation_h = custom_target(
   'ir_expression_operation.h',
   input : 'glsl/ir_expression_operation.py',
   output : 'ir_expression_operation.h',
-  command : [prog_python2, '@INPUT@', 'enum'],
+  command : [prog_python, '@INPUT@', 'enum'],
   capture : true,
 )
 
diff --git a/src/compiler/nir/meson.build b/src/compiler/nir/meson.build
index 010da386ce3..8708f9b069c 100644
--- a/src/compiler/nir/meson.build
+++ b/src/compiler/nir/meson.build
@@ -24,7 +24,7 @@ nir_builder_opcodes_h = custom_target(
   'nir_builder_opcodes.h',
   input : 'nir_builder_opcodes_h.py',
   output : 'nir_builder_opcodes.h',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
   depend_files : nir_depends,
 )
@@ -33,7 +33,7 @@ nir_constant_expressions_c = custom_target(
   'nir_constant_expressions.c',
   input : 'nir_constant_expressions.py',
   output : 'nir_constant_expressions.c',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
   depend_files : nir_depends,
 )
@@ -42,7 +42,7 @@ nir_opcodes_h = custom_target(
   'nir_opcodes.h',
   input : 'nir_opcodes_h.py',
   output : 'nir_opcodes.h',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
   depend_files : nir_depends,
 )
@@ -51,7 +51,7 @@ nir_opcodes_c = custom_target(
   'nir_opcodes.c',
   input : 'nir_opcodes_c.py',
   output : 'nir_opcodes.c',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
   depend_files : nir_depends,
 )
@@ -60,7 +60,7 @@ nir_opt_algebraic_c = custom_target(
   'nir_opt_algebraic.c',
   input : 'nir_opt_algebraic.py',
   output : 'nir_opt_algebraic.c',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
   depend_files : files('nir_algebraic.py'),
 )
@@ -69,7 +69,7 @@ nir_intrinsics_h = custom_target(
   'nir_intrinsics.h',
   input : 'nir_intrinsics_h.py',
   output : 'nir_intrinsics.h',
-  command : [prog_python2, '@INPUT@', '--outdir', meson.current_build_dir()],
+  command : [prog_python, '@INPUT@', '--outdir', meson.current_build_dir()],
   capture : false,
   depend_files : files('nir_intrinsics.py'),
 )
@@ -78,7 +78,7 @@ nir_intrinsics_c = custom_target(
   'nir_intrinsic.c',
   input : 'nir_intrinsics_c.py',
   output : 'nir_intrinsics.c',
-  command : [prog_python2, '@INPUT@', '--outdir', meson.current_build_dir()],
+  command : [prog_python, '@INPUT@', '--outdir', meson.current_build_dir()],
   capture: false,
   depend_files : files('nir_intrinsics.py'),
 )
diff --git a/src/compiler/spirv/meson.build b/src/compiler/spirv/meson.build
index eb0c0d554d9..c91d12a27d9 100644
--- a/src/compiler/spirv/meson.build
+++ b/src/compiler/spirv/meson.build
@@ -22,12 +22,12 @@ vtn_gather_types_c = custom_target(
   'vtn_gather_types.c',
   input : files('vtn_gather_types_c.py', 'spirv.core.grammar.json'),
   output : 'vtn_gather_types.c',
-  command : [prog_python2, '@INPUT0@', '@INPUT1@', '@OUTPUT@'],
+  command : [prog_python, '@INPUT0@', '@INPUT1@', '@OUTPUT@'],
 )
 
 spirv_info_c = custom_target(
   'spirv_info.c',
   input : files('spirv_info_c.py', 'spirv.core.grammar.json'),
   output : 'spirv_info.c',
-  command : [prog_python2, '@INPUT0@', '@INPUT1@', '@OUTPUT@'],
+  command : [prog_python, '@INPUT0@', '@INPUT1@', '@OUTPUT@'],
 )
diff --git a/src/egl/meson.build b/src/egl/meson.build
index 89a84fd8908..1d63f0f087c 100644
--- a/src/egl/meson.build
+++ b/src/egl/meson.build
@@ -65,7 +65,7 @@ g_egldispatchstubs_c = custom_target(
   ],
   output : 'g_egldispatchstubs.c',
   command : [
-    prog_python2, '@INPUT0@', 'source', '@INPUT1@', '@INPUT2@', '@INPUT3@'
+    prog_python, '@INPUT0@', 'source', '@INPUT1@', '@INPUT2@', '@INPUT3@'
   ],
   depend_files : files('generate/genCommon.py'),
   capture : true,
@@ -79,7 +79,7 @@ g_egldispatchstubs_h = custom_target(
   ],
   output : 'g_egldispatchstubs.h',
   command : [
-    prog_python2, '@INPUT0@', 'header', '@INPUT1@', '@INPUT2@', '@INPUT3@'
+    prog_python, '@INPUT0@', 'header', '@INPUT1@', '@INPUT2@', '@INPUT3@'
   ],
   depend_files : files('generate/genCommon.py'),
   capture : true,
diff --git a/src/gallium/auxiliary/meson.build b/src/gallium/auxiliary/meson.build
index 98542d7ef3e..858c9d0c79c 100644
--- a/src/gallium/auxiliary/meson.build
+++ b/src/gallium/auxiliary/meson.build
@@ -504,7 +504,7 @@ u_indices_gen_c = custom_target(
   'u_indices_gen.c',
   input : 'indices/u_indices_gen.py',
   output : 'u_indices_gen.c',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
 )
 
@@ -512,7 +512,7 @@ u_unfilled_gen_c = custom_target(
   'u_unfilled_gen.c',
   input : 'indices/u_unfilled_gen.py',
   output : 'u_unfilled_gen.c',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
 )
 
@@ -520,7 +520,7 @@ u_format_table_c = custom_target(
   'u_format_table.c',
   input : ['util/u_format_table.py', 'util/u_format.csv'],
   output : 'u_format_table.c',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   depend_files : files('util/u_format_pack.py', 'util/u_format_parse.py'),
   capture : true,
 )
diff --git a/src/gallium/drivers/freedreno/meson.build b/src/gallium/drivers/freedreno/meson.build
index 5cc19755ddc..7415dc9efff 100644
--- a/src/gallium/drivers/freedreno/meson.build
+++ b/src/gallium/drivers/freedreno/meson.build
@@ -23,7 +23,7 @@ ir3_nir_trig_c = custom_target(
   input : 'ir3/ir3_nir_trig.py',
   output : 'ir3_nir_trig.c',
   command : [
-    prog_python2, '@INPUT@',
+    prog_python, '@INPUT@',
     '-p', join_paths(meson.source_root(), 'src/compiler/nir/'),
   ],
   capture : true,
diff --git a/src/gallium/drivers/r600/meson.build b/src/gallium/drivers/r600/meson.build
index 5899518a2e8..4f10994d6bc 100644
--- a/src/gallium/drivers/r600/meson.build
+++ b/src/gallium/drivers/r600/meson.build
@@ -109,7 +109,7 @@ egd_tables_h = custom_target(
   'egd_tables.h',
   input : ['egd_tables.py', 'evergreend.h'],
   output : 'egd_tables.h',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
 )
 
diff --git a/src/gallium/drivers/radeonsi/meson.build b/src/gallium/drivers/radeonsi/meson.build
index 9e249adc61e..f943b61ebff 100644
--- a/src/gallium/drivers/radeonsi/meson.build
+++ b/src/gallium/drivers/radeonsi/meson.build
@@ -91,7 +91,7 @@ si_driinfo_h = custom_target(
     '../../auxiliary/pipe-loader/driinfo_gallium.h', 'driinfo_radeonsi.h'
   ),
   output : 'si_driinfo.h',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
 )
 
diff --git a/src/gallium/drivers/swr/rasterizer/codegen/meson.build b/src/gallium/drivers/swr/rasterizer/codegen/meson.build
index 841540e0f30..28275176022 100644
--- a/src/gallium/drivers/swr/rasterizer/codegen/meson.build
+++ b/src/gallium/drivers/swr/rasterizer/codegen/meson.build
@@ -22,7 +22,7 @@ gen_knobs_cpp = custom_target(
   'gen_knobs.cpp',
   input : ['gen_knobs.py'],
   output : 'gen_knobs.cpp',
-  command : [prog_python2, '@INPUT0@', '--output', '@OUTPUT@', '--gen_cpp'],
+  command : [prog_python, '@INPUT0@', '--output', '@OUTPUT@', '--gen_cpp'],
   depend_files : files(
     'knob_defs.py', 'gen_common.py',
     'templates/gen_knobs.cpp',
@@ -33,7 +33,7 @@ gen_knobs_h = custom_target(
   'gen_knobs.h',
   input : ['gen_knobs.py'],
   output : 'gen_knobs.h',
-  command : [prog_python2, '@INPUT0@', '--output', '@OUTPUT@', '--gen_h'],
+  command : [prog_python, '@INPUT0@', '--output', '@OUTPUT@', '--gen_h'],
   depend_files : files(
     'knob_defs.py', 'gen_common.py',
     'templates/gen_knobs.h',
@@ -53,7 +53,7 @@ foreach x : [[swr_context_files, 'gen_swr_context_llvm.h'],
     x[1],
     input : ['gen_llvm_types.py', x[0]],
     output : x[1],
-    command : [prog_python2, '@INPUT0@', '--input', '@INPUT1@', '--output', '@OUTPUT@'],
+    command : [prog_python, '@INPUT0@', '--input', '@INPUT1@', '--output', '@OUTPUT@'],
     depend_files : files(
       'templates/gen_llvm.hpp',
       'gen_common.py',
@@ -70,7 +70,7 @@ foreach x : [['gen_ar_event.hpp', '--gen_event_hpp'],
     input : ['gen_archrast.py', swr_event_proto_files, swr_event_pproto_files],
     output : x[0],
     command : [
-      prog_python2,
+      prog_python,
       '@INPUT0@',
       '--proto', '@INPUT1@',
       '--proto_private', '@INPUT2@',
diff --git a/src/gallium/drivers/swr/rasterizer/core/backends/meson.build b/src/gallium/drivers/swr/rasterizer/core/backends/meson.build
index 80b62174a6b..d64715dc8be 100644
--- a/src/gallium/drivers/swr/rasterizer/core/backends/meson.build
+++ b/src/gallium/drivers/swr/rasterizer/core/backends/meson.build
@@ -28,7 +28,7 @@ files_swr_common += custom_target(
     'gen_BackendPixelRate.hpp',
   ],
   command : [
-    prog_python2, '@INPUT@',
+    prog_python, '@INPUT@',
     '--outdir', '@OUTDIR@',
     '--dim', '5', '2', '3', '2', '2', '2',
     '--numfiles', '4',
@@ -46,7 +46,7 @@ files_swr_common += custom_target(
     'gen_rasterizer.hpp',
   ],
   command : [
-    prog_python2, '@INPUT@',
+    prog_python, '@INPUT@',
     '--outdir', '@OUTDIR@',
     '--rast',
     '--dim', '5', '2', '2', '3', '5', '2',
diff --git a/src/gallium/drivers/swr/rasterizer/jitter/meson.build b/src/gallium/drivers/swr/rasterizer/jitter/meson.build
index 5c201990b50..aced4a1b735 100644
--- a/src/gallium/drivers/swr/rasterizer/jitter/meson.build
+++ b/src/gallium/drivers/swr/rasterizer/jitter/meson.build
@@ -30,7 +30,7 @@ gen_builder_hpp = custom_target(
   ],
   output : 'gen_builder.hpp',
   command : [
-    prog_python2, '@INPUT0@', '--input', '@INPUT1@', '--output', '@OUTPUT@',
+    prog_python, '@INPUT0@', '--input', '@INPUT1@', '--output', '@OUTPUT@',
     '--gen_h', '--output-dir', '@OUTDIR@'
   ],
   depend_files : swr_gen_builder_depends,
@@ -42,7 +42,7 @@ gen_builder_meta_hpp = custom_target(
   input : '../codegen/gen_llvm_ir_macros.py',
   output : 'gen_builder_meta.hpp',
   command : [
-    prog_python2, '@INPUT0@', '--gen_meta_h', '--output', '@OUTPUT@',
+    prog_python, '@INPUT0@', '--gen_meta_h', '--output', '@OUTPUT@',
     '--output-dir', '@OUTDIR@'
   ],
   depend_files : swr_gen_builder_depends,
@@ -53,7 +53,7 @@ gen_builder_intrin_hpp = custom_target(
   input : '../codegen/gen_llvm_ir_macros.py',
   output : 'gen_builder_intrin.hpp',
   command : [
-    prog_python2, '@INPUT0@', '--gen_intrin_h', '--output', '@OUTPUT@',
+    prog_python, '@INPUT0@', '--gen_intrin_h', '--output', '@OUTPUT@',
     '--output-dir', '@OUTDIR@'
   ],
   depend_files : swr_gen_builder_depends,
diff --git a/src/intel/compiler/meson.build b/src/intel/compiler/meson.build
index 72b7a6796cb..98860c94374 100644
--- a/src/intel/compiler/meson.build
+++ b/src/intel/compiler/meson.build
@@ -122,7 +122,7 @@ brw_nir_trig = custom_target(
   input : 'brw_nir_trig_workarounds.py',
   output : 'brw_nir_trig_workarounds.c',
   command : [
-    prog_python2, '@INPUT@',
+    prog_python, '@INPUT@',
     '-p', join_paths(meson.source_root(), 'src/compiler/nir/'),
   ],
   depend_files : nir_algebraic_py,
diff --git a/src/intel/genxml/meson.build b/src/intel/genxml/meson.build
index 970d5654713..d0c982d0f8b 100644
--- a/src/intel/genxml/meson.build
+++ b/src/intel/genxml/meson.build
@@ -35,7 +35,7 @@ genX_xml_h = custom_target(
   'genX_xml.h',
   input : ['gen_zipped_file.py', gen_xml_files],
   output : 'genX_xml.h',
-  command : [prog_python2, '@INPUT@'],
+  command : [prog_python, '@INPUT@'],
   capture : true,
 )
 
@@ -43,7 +43,7 @@ genX_bits_h = custom_target(
   'genX_bits.h',
   input : ['gen_bits_header.py', gen_xml_files],
   output : 'genX_bits.h',
-  command : [prog_python2, '@INPUT@', '-o', '@OUTPUT@'],
+  command : [prog_python, '@INPUT@', '-o', '@OUTPUT@'],
 )
 
 gen_xml_pack = []
@@ -53,7 +53,7 @@ foreach f : gen_xml_files
     _name,
     input : ['gen_pack_header.py', f],
     output : _name,
-    command : [prog_python2, '@INPUT@'],
+    command : [prog_python, '@INPUT@'],
     capture : true,
   )
 endforeach
diff --git a/src/intel/isl/meson.build b/src/intel/isl/meson.build
index 5b57188d30c..62cde190e6e 100644
--- a/src/intel/isl/meson.build
+++ b/src/intel/isl/meson.build
@@ -66,7 +66,7 @@ isl_format_layout_c = custom_target(
   'isl_format_layout.c',
   input : ['gen_format_layout.py', 'isl_format_layout.csv'],
   output : 'isl_format_layout.c',
-  command : [prog_python2, '@INPUT0@', '--csv', '@INPUT1@', '--out', '@OUTPUT@'],
+  command : [prog_python, '@INPUT0@', '--csv', '@INPUT1@', '--out', '@OUTPUT@'],
 )
 
 libisl_files = files(
diff --git a/src/intel/vulkan/meson.build b/src/intel/vulkan/meson.build
index e427c7471f4..e11bcb0c695 100644
--- a/src/intel/vulkan/meson.build
+++ b/src/intel/vulkan/meson.build
@@ -25,7 +25,7 @@ anv_entrypoints = custom_target(
   input : ['anv_entrypoints_gen.py', vk_api_xml],
   output : ['anv_entrypoints.h', 'anv_entrypoints.c'],
   command : [
-    prog_python2, '@INPUT0@', '--xml', '@INPUT1@',
+    prog_python, '@INPUT0@', '--xml', '@INPUT1@',
     '--outdir', meson.current_build_dir(),
   ],
   depend_files : anv_extensions_py,
@@ -36,7 +36,7 @@ anv_extensions_c = custom_target(
   input : ['anv_extensions_gen.py', vk_api_xml],
   output : 'anv_extensions.c',
   command : [
-    prog_python2, '@INPUT0@', '--xml', '@INPUT1@',
+    prog_python, '@INPUT0@', '--xml', '@INPUT1@',
     '--out-c', '@OUTPUT@',
   ],
   depend_files : anv_extensions_py,
@@ -47,7 +47,7 @@ anv_extensions_h = custom_target(
   input : ['anv_extensions_gen.py', vk_api_xml],
   output : 'anv_extensions.h',
   command : [
-    prog_python2, '@INPUT0@', '--xml', '@INPUT1@',
+    prog_python, '@INPUT0@', '--xml', '@INPUT1@',
     '--out-h', '@OUTPUT@',
   ],
   depend_files : anv_extensions_py,
@@ -58,7 +58,7 @@ intel_icd = custom_target(
   input : 'anv_icd.py',
   output : 'intel_icd.@[email protected]'.format(host_machine.cpu()),
   command : [
-    prog_python2, '@INPUT@',
+    prog_python, '@INPUT@',
     '--lib-path', join_paths(get_option('prefix'), get_option('libdir')),
     '--out', '@OUTPUT@',
   ],
@@ -73,7 +73,7 @@ dev_icd = custom_target(
   input : 'anv_icd.py',
   output : 'dev_icd.@[email protected]'.format(host_machine.cpu()),
   command : [
-    prog_python2, '@INPUT@', '--lib-path', meson.current_build_dir(),
+    prog_python, '@INPUT@', '--lib-path', meson.current_build_dir(),
     '--out', '@OUTPUT@'
   ],
   depend_files : files('anv_extensions.py'),
diff --git a/src/mapi/es1api/meson.build b/src/mapi/es1api/meson.build
index 657dc2d9eff..d8a77a41df2 100644
--- a/src/mapi/es1api/meson.build
+++ b/src/mapi/es1api/meson.build
@@ -22,7 +22,7 @@ es1_glapi_mapi_tmp_h = custom_target(
   'es1_glapi_mapi_tmp.h',
   input : [mapi_abi_py, gl_and_es_api_files],
   output : 'glapi_mapi_tmp.h',
-  command : [prog_python2, '@INPUT0@', '--printer', 'es1api', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '--printer', 'es1api', '@INPUT1@'],
   depend_files : api_xml_files,
   capture : true,
 )
diff --git a/src/mapi/es2api/meson.build b/src/mapi/es2api/meson.build
index da5198ed6e8..891e6f7b27b 100644
--- a/src/mapi/es2api/meson.build
+++ b/src/mapi/es2api/meson.build
@@ -22,7 +22,7 @@ es2_glapi_mapi_tmp_h = custom_target(
   'es2_glapi_mapi_tmp.h',
   input : [mapi_abi_py, gl_and_es_api_files],
   output : 'glapi_mapi_tmp.h',
-  command : [prog_python2, '@INPUT0@', '--printer', 'es2api', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '--printer', 'es2api', '@INPUT1@'],
   depend_files : api_xml_files,
   capture : true,
 )
diff --git a/src/mapi/glapi/gen/meson.build b/src/mapi/glapi/gen/meson.build
index a6a93cc83be..b148627f712 100644
--- a/src/mapi/glapi/gen/meson.build
+++ b/src/mapi/glapi/gen/meson.build
@@ -149,7 +149,7 @@ glapi_mapi_tmp_h = custom_target(
   'glapi_mapi_tmp.h',
   input : [mapi_abi_py, 'gl_and_es_API.xml'],
   output : 'glapi_mapi_tmp.h',
-  command : [prog_python2, '@INPUT0@', '--printer', 'glapi', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '--printer', 'glapi', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
@@ -158,7 +158,7 @@ glprocs_h = custom_target(
   'glprocs.h',
   input : ['gl_procs.py', 'gl_and_es_API.xml'],
   output : 'glprocs.h',
-  command : [prog_python2, '@INPUT0@', '-c', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-c', '-f', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
@@ -167,7 +167,7 @@ glapitemp_h = custom_target(
   'glapitemp.h',
   input : ['gl_apitemp.py', 'gl_and_es_API.xml'],
   output : 'glapitemp.h',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
@@ -176,7 +176,7 @@ glapitable_h = custom_target(
   'glapitable.h',
   input : ['gl_table.py', 'gl_and_es_API.xml'],
   output : 'glapitable.h',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
@@ -185,7 +185,7 @@ glapi_gentable_c = custom_target(
   'glapi_gentable.c',
   input : ['gl_gentable.py', 'gl_and_es_API.xml'],
   output : 'glapi_gentable.c',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
@@ -194,7 +194,7 @@ main_enums_c = custom_target(
   'enums.c',
   input : ['gl_enums.py', files('../registry/gl.xml')],
   output : 'enums.c',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   capture : true,
 )
 
@@ -202,7 +202,7 @@ main_api_exec_c = custom_target(
   'api_exec.c',
   input : ['gl_genexec.py', 'gl_and_es_API.xml'],
   output : 'api_exec.c',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : files('apiexec.py') + glapi_gen_depends,
   capture : true,
 )
@@ -211,7 +211,7 @@ main_marshal_generated_c = custom_target(
   'marshal_generated.c',
   input : ['gl_marshal.py', 'gl_and_es_API.xml'],
   output : 'marshal_generated.c',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : files('marshal_XML.py') + glapi_gen_depends,
   capture : true,
 )
@@ -223,7 +223,7 @@ foreach x : [['indirect.c', 'proto'], ['indirect.h', 'init_h'], ['indirect_init.
     x[0],
     input : ['glX_proto_send.py', 'gl_API.xml'],
     output : x[0],
-    command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@', '-m', x[1]],
+    command : [prog_python, '@INPUT0@', '-f', '@INPUT1@', '-m', x[1]],
     depend_files : glx_gen_depends,
     capture : true,
   )
@@ -235,7 +235,7 @@ foreach x : [['indirect_size.h', ['-m', 'size_h', '--header-tag', '_INDIRECT_SIZ
     x[0],
     input : ['glX_proto_size.py', 'gl_API.xml'],
     output : x[0],
-    command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@', '--only-set', x[1]],
+    command : [prog_python, '@INPUT0@', '-f', '@INPUT1@', '--only-set', x[1]],
     depend_files : glx_gen_depends,
     capture : true,
   )
@@ -246,7 +246,7 @@ glapi_x86_s = custom_target(
   'glapi_x86.S',
   input : ['gl_x86_asm.py', gl_and_es_api_files],
   output : 'glapi_x86.S',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
@@ -255,7 +255,7 @@ glapi_x86_64_s = custom_target(
   'glapi_x86-64.S',
   input : ['gl_x86-64_asm.py', gl_and_es_api_files],
   output : 'glapi_x86-64.S',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
@@ -264,7 +264,7 @@ glapi_sparc_s = custom_target(
   'glapi_sparc.S',
   input : ['gl_SPARC_asm.py', gl_and_es_api_files],
   output : 'glapi_sparc.S',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
diff --git a/src/mapi/shared-glapi/meson.build b/src/mapi/shared-glapi/meson.build
index c7d136ced2c..44e86f845f6 100644
--- a/src/mapi/shared-glapi/meson.build
+++ b/src/mapi/shared-glapi/meson.build
@@ -31,7 +31,7 @@ shared_glapi_mapi_tmp_h = custom_target(
   'shared_glapi_mapi_tmp.h',
   input : [mapi_abi_py, gl_and_es_api_files],
   output : 'glapi_mapi_tmp.h',
-  command : [prog_python2, '@INPUT0@', '--printer', 'shared-glapi', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '--printer', 'shared-glapi', '@INPUT1@'],
   depend_files : api_xml_files,
   capture : true,
 )
diff --git a/src/mesa/drivers/dri/i965/meson.build b/src/mesa/drivers/dri/i965/meson.build
index 761bb51d6fa..6c94f4aea71 100644
--- a/src/mesa/drivers/dri/i965/meson.build
+++ b/src/mesa/drivers/dri/i965/meson.build
@@ -170,7 +170,7 @@ i965_oa_sources = custom_target(
   input : i965_hw_metrics_xml_files,
   output : [ 'brw_oa_metrics.c', 'brw_oa_metrics.h' ],
   command : [
-    prog_python2, files('brw_oa.py'),
+    prog_python, files('brw_oa.py'),
     '--code', '@OUTPUT0@', '--header', '@OUTPUT1@',
     '@INPUT@',
   ],
diff --git a/src/mesa/main/meson.build b/src/mesa/main/meson.build
index 57487fe4da5..a5f0e02c6cd 100644
--- a/src/mesa/main/meson.build
+++ b/src/mesa/main/meson.build
@@ -22,7 +22,7 @@ main_dispatch_h = custom_target(
   'dispatch.h',
   input : [files('../../mapi/glapi/gen/gl_table.py'), gl_and_es_api_files],
   output : 'dispatch.h',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@', '-m', 'remap_table'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@', '-m', 'remap_table'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
@@ -31,7 +31,7 @@ main_marshal_generated_h = custom_target(
   'marshal_generated.h',
   input : [files('../../mapi/glapi/gen/gl_marshal_h.py'), gl_and_es_api_files],
   output : 'marshal_generated.h',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : files('../../mapi/glapi/gen/marshal_XML.py') + glapi_gen_depends,
   capture : true,
 )
@@ -40,7 +40,7 @@ main_remap_helper_h = custom_target(
   'remap_helper.h',
   input : [files('../../mapi/glapi/gen/remap_helper.py'), gl_and_es_api_files],
   output : 'remap_helper.h',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : glapi_gen_depends,
   capture : true,
 )
diff --git a/src/mesa/meson.build b/src/mesa/meson.build
index 29633691ee7..10ae63b611b 100644
--- a/src/mesa/meson.build
+++ b/src/mesa/meson.build
@@ -664,7 +664,7 @@ format_fallback_c = custom_target(
   'format_fallback.c',
   input : ['main/format_fallback.py', 'main/formats.csv'],
   output : 'format_fallback.c',
-  command : [prog_python2, '@INPUT0@', '@INPUT1@', '@OUTPUT@'],
+  command : [prog_python, '@INPUT0@', '@INPUT1@', '@OUTPUT@'],
   depend_files : files('main/format_parser.py'),
 )
 
@@ -672,7 +672,7 @@ get_hash_h = custom_target(
   'get_hash.h',
   input : ['main/get_hash_generator.py', gl_and_es_api_files],
   output : 'get_hash.h',
-  command : [prog_python2, '@INPUT0@', '-f', '@INPUT1@'],
+  command : [prog_python, '@INPUT0@', '-f', '@INPUT1@'],
   depend_files : files('main/get_hash_params.py'),
   capture : true,
 )
@@ -684,7 +684,7 @@ foreach x : [['format_info.h', 'format_info.py'],
     x[0],
     input : ['main/@0@'.format(x[1]), 'main/formats.csv'],
     output : x[0],
-    command : [prog_python2, '@INPUT0@', '@INPUT1@'],
+    command : [prog_python, '@INPUT0@', '@INPUT1@'],
     depend_files : files('main/format_parser.py'),
     capture : true,
   )
diff --git a/src/meson.build b/src/meson.build
index 6213b7d8a36..af881cff70b 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -42,7 +42,7 @@ libglsl_util = static_library(
 sha1_h = custom_target(
   'git_sha1.h',
   output : 'git_sha1.h',
-  command : [prog_python2, git_sha1_gen_py, '--output', '@OUTPUT@'],
+  command : [prog_python, git_sha1_gen_py, '--output', '@OUTPUT@'],
   build_always : true, # commit sha1 can change without having touched these files
 )
 
diff --git a/src/util/meson.build b/src/util/meson.build
index 6386d945a22..51980e9214e 100644
--- a/src/util/meson.build
+++ b/src/util/meson.build
@@ -100,7 +100,7 @@ format_srgb = custom_target(
   'format_srgb',
   input : ['format_srgb.py'],
   output : 'format_srgb.c',
-  command : [prog_python2, '@INPUT0@'],
+  command : [prog_python, '@INPUT0@'],
   capture : true,
 )
 
diff --git a/src/util/xmlpool/meson.build b/src/util/xmlpool/meson.build
index 97693fac8c4..346b1956a55 100644
--- a/src/util/xmlpool/meson.build
+++ b/src/util/xmlpool/meson.build
@@ -22,7 +22,7 @@ xmlpool_options_h = custom_target(
   'xmlpool_options.h',
   input : ['gen_xmlpool.py', 't_options.h'],
   output : 'options.h',
-  command : [prog_python2, '@INPUT@', meson.current_source_dir()],
+  command : [prog_python, '@INPUT@', meson.current_source_dir()],
   capture : true,
   depend_files : files('ca.po', 'es.po', 'de.po', 'nl.po', 'sv.po', 'fr.po'),
 )
diff --git a/src/vulkan/util/meson.build b/src/vulkan/util/meson.build
index 78cee0adb50..15e4ff49129 100644
--- a/src/vulkan/util/meson.build
+++ b/src/vulkan/util/meson.build
@@ -31,7 +31,7 @@ vk_enum_to_str = custom_target(
   input : ['gen_enum_to_str.py', vk_api_xml[0]],
   output : ['vk_enum_to_str.c', 'vk_enum_to_str.h'],
   command : [
-    prog_python2, '@INPUT0@', '--xml', '@INPUT1@', '--outdir',
+    prog_python, '@INPUT0@', '--xml', '@INPUT1@', '--outdir',
     meson.current_build_dir()
   ],
 )