From e5c9b199492a4f8c1a26d675b5a69de33bd2727d Mon Sep 17 00:00:00 2001
From: Ge Wang <ge@ccrma.stanford.edu>
Date: Sat, 13 Apr 2024 14:49:53 -0700
Subject: [PATCH] add include <optional> for linux build

---
 src/fetch.h        | 1 +
 src/package_list.h | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/fetch.h b/src/fetch.h
index 200354e..5930428 100644
--- a/src/fetch.h
+++ b/src/fetch.h
@@ -9,6 +9,7 @@
 #include <fstream>
 #include <regex>
 #include <cstdlib>
+#include <optional>
 
 using json = nlohmann::json;
 
diff --git a/src/package_list.h b/src/package_list.h
index f65dc6f..59a13bc 100644
--- a/src/package_list.h
+++ b/src/package_list.h
@@ -2,7 +2,7 @@
 #define __PACKAGELIST_H__
 
 #include <fstream>
-
+#include <optional>
 #include <nlohmann/json.hpp>
 
 #include "package.h"