Revert "Enable MSVC standard conformance for JIT sources (#67608)" (#67674)

This reverts commit 548bb58.

Author: jakobbotsch

src/coreclr/jit/CMakeLists.txt

@@ -11,10 +11,6 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_
   add_compile_options(-Wno-error)
 endif()
 
-if (MSVC)
-  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/permissive->)
-endif()
-
 function(create_standalone_jit)
 
   set(oneValueArgs TARGET OS ARCH)

src/coreclr/jit/unwind.h

@@ -79,6 +79,32 @@ class UnwindBase
     {
     }
 
+// TODO: How do we get the ability to access uwiComp without error on Clang?
+#if defined(DEBUG) && !defined(__GNUC__)
+
+    template <typename T>
+    T dspPtr(T p)
+    {
+        return uwiComp->dspPtr(p);
+    }
+
+    template <typename T>
+    T dspOffset(T o)
+    {
+        return uwiComp->dspOffset(o);
+    }
+
+    static const char* dspBool(bool b)
+    {
+        return (b) ? "true" : "false";
+    }
+
+#endif // DEBUG
+
+    //
+    // Data
+    //
+
     Compiler* uwiComp;
 };