[libc++] Fix gcc warning -Wsign-compare.
diff --git a/libcxx/test/support/filesystem_test_helper.h b/libcxx/test/support/filesystem_test_helper.h
index ad7ade3..8136658 100644
--- a/libcxx/test/support/filesystem_test_helper.h
+++ b/libcxx/test/support/filesystem_test_helper.h
@@ -185,7 +185,7 @@
filename = sanitize_path(std::move(filename));
if (size >
- static_cast<typename std::make_signed<large_file_offset_t>::type>(
+ static_cast<typename std::make_unsigned<large_file_offset_t>::type>(
std::numeric_limits<large_file_offset_t>::max())) {
fprintf(stderr, "create_file(%s, %ju) too large\n",
filename.c_str(), size);
