try fixing for mingw

libarchive/archive_read_support_format_mtree.c

@@ -1236,7 +1236,7 @@ parse_file(struct archive_read *a, struct archive_entry *entry,
 			}
 		}
 #ifdef HAVE_LSTAT
-		else if (lstat(path, st) == -1)
+		else if (lstat(path, (struct stat *)st) == -1)
 #else
 		else if (la_seek_stat(path, st) == -1)
 #endif

libarchive/archive_string.c

@@ -448,12 +448,12 @@ default_iconv_charset(const char *charset) {
 #if HAVE_LOCALE_CHARSET && HAVE_LOCALCHARSET_H && !defined(__APPLE__)
 	/* locale_charset() is broken on Mac OS */
 	return locale_charset();
-#elif HAVE_NL_LANGINFO
+#elif defined(HAVE_LANGINFO_H) && defined(CODESET)
 	return nl_langinfo(CODESET);
 #elif defined(__BIONIC__)
 	return "UTF-8";
 #else
-	return "";
+	return "UTF-8";
 #endif
 }