configure: add MACHDEP and platform on MINGW

Co-authored-by: Алексей <[email protected]>

Author: Alexpux

configure.ac

@@ -545,6 +545,9 @@ then
 	*-*-cygwin*)
 		ac_sys_system=Cygwin
 		;;
+	*-*-mingw*)
+		ac_sys_system=MINGW
+		;;
 	*-*-vxworks*)
 	    ac_sys_system=VxWorks
 	    ;;
@@ -580,6 +583,7 @@ then
 	linux*) MACHDEP="linux";;
 	cygwin*) MACHDEP="cygwin";;
 	darwin*) MACHDEP="darwin";;
+	mingw*) MACHDEP="win32";;
 	'')	MACHDEP="unknown";;
     esac
 fi
@@ -605,13 +609,24 @@ if test "$cross_compiling" = yes; then
 		;;
 	wasm32-*-* | wasm64-*-*)
 		_host_cpu=$host_cpu
+    ;;
+	*-*-mingw*)
+		_host_cpu=
 		;;
 	*)
 		# for now, limit cross builds to known configurations
 		MACHDEP="unknown"
 		AC_MSG_ERROR([cross build not supported for $host])
 	esac
 	_PYTHON_HOST_PLATFORM="$MACHDEP${_host_cpu:+-$_host_cpu}"
+
+	case "$host_os" in
+	mingw*)
+	# As sys.platform() return 'win32' to build python and extantions
+	# we will use 'mingw' (in setup.py and etc.)
+	_PYTHON_HOST_PLATFORM=mingw
+	;;
+	esac
 fi
 
 # Some systems cannot stand _XOPEN_SOURCE being defined at all; they