[PATCH v2 03/13] meson: pass rustc_args when building all crates

[Paolo Bonzini <pbonzini@redhat.com>]

rustc_args is needed to smooth the difference in warnings between the various
versions of rustc.  Always include those arguments.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build                       | 20 +++++++++++++-------
 rust/qemu-api/meson.build         |  2 +-
 rust/qemu-api/src/device_class.rs | 10 ++++++----
 3 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/meson.build b/meson.build
index f85bc22fbdd..63c07a5b660 100644
--- a/meson.build
+++ b/meson.build
@@ -3317,6 +3317,19 @@ endif
 
 genh += configure_file(output: 'config-host.h', configuration: config_host_data)
 
+if have_rust and have_system
+  rustc_args = run_command(
+    find_program('scripts/rust/rustc_args.py'),
+    '--config-headers', meson.project_build_root() / 'config-host.h',
+    capture : true,
+    check: true).stdout().strip().split()
+
+  # Prohibit code that is forbidden in Rust 2024
+  rustc_args += ['-D', 'unsafe_op_in_unsafe_fn']
+  add_project_arguments(rustc_args, native: false, language: 'rust')
+  add_project_arguments(rustc_args, native: true, language: 'rust')
+endif
+
 hxtool = find_program('scripts/hxtool')
 shaderinclude = find_program('scripts/shaderinclude.py')
 qapi_gen = find_program('scripts/qapi-gen.py')
@@ -3909,12 +3922,6 @@ common_all = static_library('common',
                             dependencies: common_ss.all_dependencies())
 
 if have_rust and have_system
-  rustc_args = run_command(
-    find_program('scripts/rust/rustc_args.py'),
-    '--config-headers', meson.project_build_root() / 'config-host.h',
-    capture : true,
-    check: true).stdout().strip().split()
-  rustc_args += ['-D', 'unsafe_op_in_unsafe_fn']
   bindgen_args = [
     '--disable-header-comment',
     '--raw-line', '// @generated',
@@ -4087,7 +4094,6 @@ foreach target : target_dirs
                             rlib_rs,
                             dependencies: target_rust.dependencies(),
                             override_options: ['rust_std=2021', 'build.rust_std=2021'],
-                            rust_args: rustc_args,
                             rust_abi: 'c')
       arch_deps += declare_dependency(link_whole: [rlib])
     endif
diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build
index c72d34b607d..42ea815fa5a 100644
--- a/rust/qemu-api/meson.build
+++ b/rust/qemu-api/meson.build
@@ -10,7 +10,7 @@ _qemu_api_rs = static_library(
   ),
   override_options: ['rust_std=2021', 'build.rust_std=2021'],
   rust_abi: 'rust',
-  rust_args: rustc_args + [
+  rust_args: [
     '--cfg', 'MESON',
     # '--cfg', 'feature="allocator"',
   ],
diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_class.rs
index 1ea95beb78d..b6b68cf9ce2 100644
--- a/rust/qemu-api/src/device_class.rs
+++ b/rust/qemu-api/src/device_class.rs
@@ -16,10 +16,12 @@ macro_rules! device_class_init {
         ) {
             let mut dc =
                 ::core::ptr::NonNull::new(klass.cast::<$crate::bindings::DeviceClass>()).unwrap();
-            dc.as_mut().realize = $realize_fn;
-            dc.as_mut().vmsd = &$vmsd;
-            $crate::bindings::device_class_set_legacy_reset(dc.as_mut(), $legacy_reset_fn);
-            $crate::bindings::device_class_set_props(dc.as_mut(), $props.as_mut_ptr());
+            unsafe {
+                dc.as_mut().realize = $realize_fn;
+                dc.as_mut().vmsd = &$vmsd;
+                $crate::bindings::device_class_set_legacy_reset(dc.as_mut(), $legacy_reset_fn);
+                $crate::bindings::device_class_set_props(dc.as_mut(), $props.as_mut_ptr());
+            }
         }
     };
 }
-- 
2.46.2