rust: allow version 1.63.0 of rustc

All constructs introduced by newer versions of Rust have been removed.

Apart from Debian 12, all other supported Linux distributions have
rustc 1.75.0 or newer.  This means that they only lack c"" literals
and stable offset_of!.

Tested-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/meson.build b/meson.build
index 6880acc36b690f73c327dcffa52fd137fd3c242e..11d7c3464c93352dba5efef16849adf64a80588e 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -89,11 +89,12 @@ have_rust = have_rust and add_languages('rust', native: true,
     required: get_option('rust').disable_auto_if(not have_system))
 if have_rust
   rustc = meson.get_compiler('rust')
-  if rustc.version().version_compare('<1.80.0')
+  if rustc.version().version_compare('<1.63.0')
     if get_option('rust').enabled()
-      error('rustc version ' + rustc.version() + ' is unsupported: Please upgrade to at least 1.80.0')
+      error('rustc version ' + rustc.version() + ' is unsupported. Please upgrade to at least 1.63.0')
     else
-      warning('rustc version ' + rustc.version() + ' is unsupported: Disabling Rust compilation. Please upgrade to at least 1.80.0 to use Rust.')
+      warning('rustc version ' + rustc.version() + ' is unsupported, disabling Rust compilation.')
+      message('Please upgrade to at least 1.63.0 to use Rust.')
       have_rust = false
     endif
   endif