tooks/kconfig: Win32 build (GIT8266O-816)

tools/kconfig/confdata.c

@@ -819,6 +819,10 @@ int conf_write(const char *name)
 	if (*tmpname) {
 		strcat(dirname, basename);
 		strcat(dirname, ".old");
+#ifdef WIN32
+        // On Windows rename() fails if a file exists
+		unlink(dirname);
+#endif
 		rename(newname, dirname);
 		if (rename(tmpname, newname))
 			return 1;

tools/kconfig/lxdialog/util.c

@@ -566,6 +566,17 @@ int on_key_esc(WINDOW *win)
 	nodelay(win, TRUE);
 	keypad(win, FALSE);
 	key = wgetch(win);
+#ifdef WIN32
+    /*
+	 * On Windowa ncurses uses terminal driver, which reads keys directly
+	 * from Windows API, so it doesn't have to recognize ESC sequences and
+	 * buffer the first ESC as a consequence. ESC is emitted instantly to
+	 * an application, so second nodelay read will return ERR.
+	 * Yes, there's no need to press Esc twice.
+	 */
+    if (key == ERR)
+	    return KEY_ESC;
+#endif
 	key2 = wgetch(win);
 	do {
 		key3 = wgetch(win);

tools/kconfig/symbol.c

@@ -7,7 +7,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <regex.h>
+#ifndef _WIN32
 #include <sys/utsname.h>
+#endif
 
 #include "lkc.h"
 
@@ -44,6 +46,7 @@ static void sym_add_default(struct symbol *sym, const char *def)
 
 void sym_init(void)
 {
+#ifndef _WIN32
 	struct symbol *sym;
 	struct utsname uts;
 	static bool inited = false;
@@ -58,6 +61,7 @@ void sym_init(void)
 	sym->type = S_STRING;
 	sym->flags |= SYMBOL_AUTO;
 	sym_add_default(sym, uts.release);
+#endif
 }
 
 enum symbol_type sym_get_type(struct symbol *sym)