[Stable-9.2.2 01/14] rust: add --rust-target option for bindgen

[Michael Tokarev]

From: Paolo Bonzini <pbonz...@redhat.com>

Without it, recent bindgen will give an error

   error: extern block cannot be declared unsafe

if rustc is not new enough to support the "unsafe extern" construct.

Cc: qemu-r...@nongnu.org
Cc: qemu-sta...@nongnu.org
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Message-ID: <20250206111514.2134895-1-pbonz...@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
(cherry picked from commit 131c58469f6fb68c89b38fee6aba8bbb20c7f4bf)
Signed-off-by: Michael Tokarev <m...@tls.msk.ru>

diff --git a/meson.build b/meson.build
index 7a3faca61d..7f6f638676 100644
--- a/meson.build
+++ b/meson.build
@@ -4050,6 +4050,9 @@ if have_rust
       bindgen_args += ['--formatter', 'none']
     endif
   endif
+  if bindgen.version().version_compare('>=0.66.0')
+    bindgen_args += ['--rust-target', '1.59']
+  endif
   if bindgen.version().version_compare('<0.61.0')
     # default in 0.61+
     bindgen_args += ['--size_t-is-usize']
-- 
2.39.5