meson: centralize checking for new enough meson for rust support

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30414>

meson.build

@@ -841,13 +841,21 @@ if with_gallium_rusticl
   if not with_gallium
     error('rusticl requires at least one gallium driver.')
   endif
-
-  if meson.version().version_compare('< 1.4.0')
-    error('rusticl requires meson 1.4.0 or newer')
-  endif
 endif
 
 if with_gallium_rusticl or with_nouveau_vk or with_tools.contains('etnaviv')
+  if with_gallium_rusticl
+    # uses rust.bindgen.output_inline_wrapper needing 1.4.0
+    if meson.version().version_compare('< 1.4.0')
+      error('Rusticl requires meson 1.4.0 or newer')
+    endif
+  else
+    # see https://github.com/mesonbuild/meson/issues/12758 (backported to 1.3.2)
+    if meson.version().version_compare('< 1.3.2')
+      error('Mesa Rust support requires meson 1.3.2 or newer')
+    endif
+  endif
+
   add_languages('rust', required: true)
   rustc = meson.get_compiler('rust')
   rust = import('rust')

src/etnaviv/isa/meson.build

@@ -91,10 +91,6 @@ disasm = executable(
 )
 
 if with_tools.contains('etnaviv')
-  if meson.version().version_compare('< 1.4.0')
-    error('etnaviv requires meson 1.4.0 or newer')
-  endif
-
   isa_bindings_rs = rust.bindgen(
     input : 'bindings.h',
     output : 'isa_bindings.rs',

src/nouveau/compiler/meson.build

@@ -1,9 +1,5 @@
 # Copyright © 2022 Collabora, Ltd.
 # SPDX-License-Identifier: MIT
-if meson.version().version_compare('< 1.3.0')
-  error('NVK requires meson 1.3.0 or newer')
-endif
-
 nak_rust_args = [
   '-Aclippy::identity_op',
   '-Aclippy::len_zero',

src/nouveau/nil/meson.build

@@ -1,9 +1,5 @@
 # Copyright © 2022 Collabora Ltd
 # SPDX-License-Identifier: MIT
-if meson.version().version_compare('< 1.3.0')
-  error('NVK requires meson 1.3.0 or newer')
-endif
-
 prog_cbindgen = find_program(
   'cbindgen',
   required : true,