We cannot build MSVC with debug information on variables because the compiler does not allow us to statically initialize arrays/vectors of the ecl_array/ecl_vector type

src/cmp/cmptop.lsp

@@ -551,6 +551,12 @@
                 ((special global closure replaced lexical) . NIL)))))
 
 (defun build-debug-lexical-env (var-locations &optional first)
+  #+:msvc
+  (if first
+      (wt-nl "cl_object _ecl_debug_env = Cnil;")
+    (wt-nl "ihs.lex_env = _ecl_debug_env = Cnil;"))
+
+  #-:msvc ;; FIXME! Problem with initialization of statically defined vectors
   (let* ((filtered-locations '())
          (filtered-codes '()))
     ;; Filter out variables that we know how to store in the

src/cmp/cmpwt.lsp

@@ -286,6 +286,8 @@
     (t nil)))
 
 (defun add-static-constant (object)
+  #+msvc
+  nil
   #-:msvc
   ;; FIXME! The Microsoft compiler does not allow static initialization of bit fields.
   (unless (or *compiler-constants* (not (listp *static-constants*)))