util: rust: more rust support for windows/MacOS

Need the same dependencies as Linux.

The RustixError type compiles on Windows.

Reviewed-by: David Gilhooley <djgilhooley.gmail.com>

src/util/rust/error.rs

@@ -7,7 +7,6 @@ use std::num::TryFromIntError;
 use std::str::Utf8Error;
 
 use remain::sorted;
-#[cfg(any(target_os = "android", target_os = "linux"))]
 use rustix::io::Errno as RustixError;
 use thiserror::Error;
 
@@ -25,7 +24,6 @@ pub enum MesaError {
     #[error("Nul Error occurred {0}")]
     NulError(NulError),
     /// Rustix crate error.
-    #[cfg(any(target_os = "android", target_os = "linux"))]
     #[error("The errno is {0}")]
     RustixError(RustixError),
     /// An attempted integer conversion failed.
@@ -42,7 +40,6 @@ pub enum MesaError {
     WithContext(&'static str),
 }
 
-#[cfg(any(target_os = "android", target_os = "linux"))]
 impl From<RustixError> for MesaError {
     fn from(e: RustixError) -> MesaError {
         MesaError::RustixError(e)

src/util/rust/meson.build

@@ -34,7 +34,10 @@ dep_zerocopy_derive = dependency('zerocopy-derive',
 dep_mesa3d_util = [dep_cfg_if, dep_thiserror, dep_remain, dep_zerocopy,
                    dep_zerocopy_derive]
 
-if host_machine.system() == 'linux'
+supported_systems = ['linux', 'windows', 'darwin', 'macos']
+supported_host_machine = host_machine.system() in supported_systems
+
+if supported_host_machine
   dep_rustix = dependency('rustix',
     version: '>= 0.38.31',
     fallback: ['rustix-1-rs', 'dep_rustix'],