Issue #28768: Fix implicit declaration of function _setmode. Patch by Masayuki Yamamoto

Misc/NEWS

@@ -597,6 +597,9 @@ Documentation
 Build
 -----
 
+- Issue #28768: Fix implicit declaration of function _setmode. Patch by
+  Masayuki Yamamoto
+
 - Issue #29080: Removes hard dependency on hg.exe from PC/build.bat
 
 - Issue #23903: Added missed names to PC/python3.def.

Modules/_io/fileio.c

@@ -9,6 +9,9 @@
 #ifdef HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif

Modules/main.c

@@ -7,6 +7,9 @@
 
 #if defined(MS_WINDOWS) || defined(__CYGWIN__)
 #include <windows.h>
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif