bpo-32588: Move _findvs into its own module and add missing _queue module to installer (#5227)

_msvccompiler.py

@@ -56,7 +56,7 @@ def _find_vc2015():
     return best_version, best_dir
 
 def _find_vc2017():
-    import _findvs
+    import _distutils_findvs
     import threading
 
     best_version = 0,   # tuple for full version comparisons
@@ -66,7 +66,7 @@ def _find_vc2017():
     # initialize COM.
     all_packages = []
     def _getall():
-        all_packages.extend(_findvs.findall())
+        all_packages.extend(_distutils_findvs.findall())
     t = threading.Thread(target=_getall)
     t.start()
     t.join()

command/bdist_wininst.py

@@ -337,11 +337,10 @@ class bdist_wininst(Command):
                 # cross-building, so assume the latest version
                 bv = '14.0'
             else:
-                bv = '.'.join(CRT_ASSEMBLY_VERSION.split('.', 2)[:2])
-                if bv in ('14.11', '14.12'):
-                    # v142, v141 and v140 are binary compatible,
-                    # so keep using the 14.0 stub.
-                    bv = '14.0'
+                # as far as we know, CRT is binary compatible based on
+                # the first field, so assume 'x.0' until proven otherwise
+                major = CRT_ASSEMBLY_VERSION.partition('.')[0]
+                bv = major + '.0'
 
 
         # wininst-x.y.exe is in the same directory as this file