Try fixing compilation on Windows.

lib/runtime-core/src/codegen.rs

@@ -1,11 +1,12 @@
 //! The codegen module provides common functions and data structures used by multiple backends
 //! during the code generation process.
+#[cfg(unix)]
+use crate::fault::FaultInfo;
 use crate::{
     backend::RunnableModule,
     backend::{Backend, CacheGen, Compiler, CompilerConfig, Features, Token},
     cache::{Artifact, Error as CacheError},
     error::{CompileError, CompileResult},
-    fault::FaultInfo,
     module::{ModuleInfo, ModuleInner},
     structures::Map,
     types::{FuncIndex, FuncSig, SigIndex},
@@ -67,6 +68,7 @@ impl fmt::Debug for InternalEvent {
 /// Information for a breakpoint
 pub struct BreakpointInfo<'a> {
     /// Fault.
+    #[cfg(unix)]
     pub fault: Option<&'a FaultInfo>,
 }
 

lib/runtime-core/src/state.rs

@@ -477,6 +477,7 @@ impl InstanceImage {
 }
 
 /// Declarations for x86-64 registers.
+#[cfg(unix)]
 pub mod x64_decl {
     use super::*;
 
@@ -608,6 +609,7 @@ pub mod x64_decl {
     }
 }
 
+#[cfg(unix)]
 pub mod x64 {
     //! The x64 state module contains functions to generate state and code for x64 targets.
     pub use super::x64_decl::*;