xenia-cpu-ppc-tests is now building on linux

src/xenia/cpu/backend/backend.h

@@ -34,14 +34,14 @@ class CodeCache;
 
 class Backend {
  public:
-  explicit Backend(Processor* processor);
+  explicit Backend();
   virtual ~Backend();
 
   Processor* processor() const { return processor_; }
   const MachineInfo* machine_info() const { return &machine_info_; }
   CodeCache* code_cache() const { return code_cache_; }
 
-  virtual bool Initialize();
+  virtual bool Initialize(Processor* processor);
 
   virtual void* AllocThreadData();
   virtual void FreeThreadData(void* thread_data);
@@ -65,9 +65,9 @@ class Backend {
   virtual void UninstallBreakpoint(Breakpoint* breakpoint) {}
 
  protected:
-  Processor* processor_;
+  Processor* processor_ = nullptr;
   MachineInfo machine_info_;
-  CodeCache* code_cache_;
+  CodeCache* code_cache_ = nullptr;
 };
 
 }  // namespace backend