diff -Naur Python-3.7.0-orig/Modules/_winapi.c Python-3.7.0/Modules/_winapi.c
--- Python-3.7.0-orig/Modules/_winapi.c	2018-06-27 06:07:35.000000000 +0300
+++ Python-3.7.0/Modules/_winapi.c	2018-07-12 10:21:21.496753800 +0300
@@ -39,7 +39,9 @@
 
 #define WINDOWS_LEAN_AND_MEAN
 #include "windows.h"
+#if defined(Py_DEBUG)
 #include <crtdbg.h>
+#endif
 #include "winreparse.h"
 
 #if defined(MS_WIN32) && !defined(MS_WIN64)
diff -Naur Python-3.7.0-orig/Modules/main.c Python-3.7.0/Modules/main.c
--- Python-3.7.0-orig/Modules/main.c	2018-06-27 06:07:35.000000000 +0300
+++ Python-3.7.0/Modules/main.c	2018-07-12 10:21:21.496753800 +0300
@@ -18,7 +18,7 @@
 #  endif
 #endif
 
-#ifdef _MSC_VER
+#if defined(_WIN32) && defined(Py_DEBUG)
 #  include <crtdbg.h>
 #endif
 
diff -Naur Python-3.7.0-orig/PC/msvcrtmodule.c Python-3.7.0/PC/msvcrtmodule.c
--- Python-3.7.0-orig/PC/msvcrtmodule.c	2018-06-27 06:07:35.000000000 +0300
+++ Python-3.7.0/PC/msvcrtmodule.c	2018-07-12 10:21:21.512353900 +0300
@@ -21,7 +21,9 @@
 #include <io.h>
 #include <conio.h>
 #include <sys/locking.h>
+#ifdef _DEBUG
 #include <crtdbg.h>
+#endif
 #include <windows.h>
 
 #ifdef _MSC_VER
diff -Naur Python-3.7.0-orig/Python/dynamic_annotations.c Python-3.7.0/Python/dynamic_annotations.c
--- Python-3.7.0-orig/Python/dynamic_annotations.c	2018-06-27 06:07:35.000000000 +0300
+++ Python-3.7.0/Python/dynamic_annotations.c	2018-07-12 10:21:21.465553800 +0300
@@ -27,7 +27,7 @@
  * Author: Kostya Serebryany
  */
 
-#ifdef _MSC_VER
+#ifdef MS_WINDOWS
 # include <windows.h>
 #endif
 
diff -Naur Python-3.7.0-orig/setup.py Python-3.7.0/setup.py
--- Python-3.7.0-orig/setup.py	2018-07-12 10:21:21.106753200 +0300
+++ Python-3.7.0/setup.py	2018-07-12 10:21:21.512353900 +0300
@@ -962,6 +962,24 @@
         min_db_ver = (3, 3)
         db_setup_debug = False   # verbose debug prints from this script?
 
+        # Modules with some Windows dependencies:
+        if host_platform.startswith(('mingw', 'win')):
+            srcdir = sysconfig.get_config_var('srcdir')
+            pc_srcdir = os.path.abspath(os.path.join(srcdir, 'PC'))
+
+            exts.append( Extension('msvcrt', [os.path.join(pc_srcdir, p)
+                for p in ['msvcrtmodule.c']]) )
+
+            exts.append( Extension('_winapi', ['_winapi.c']) )
+
+            exts.append( Extension('_msi', [os.path.join(pc_srcdir, p)
+                for p in ['_msi.c']],
+                libraries=['msi','cabinet','rpcrt4']) ) # To link with lib(msi|cabinet|rpcrt4).a
+
+            exts.append( Extension('winsound', [os.path.join(pc_srcdir, p)
+                for p in ['winsound.c']],
+                libraries=['winmm']) )
+
         def allow_db_ver(db_ver):
             """Returns a boolean if the given BerkeleyDB version is acceptable.