From 6a0b111a01327717e46e819eb0096c85ef2306f6 Mon Sep 17 00:00:00 2001
From: tyfkda <tyfkda@gmail.com>
Date: Fri, 1 Dec 2023 10:48:29 +0900
Subject: [PATCH] Suppress macro expansion for including system header

---
 src/cpp/preprocessor.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/cpp/preprocessor.c b/src/cpp/preprocessor.c
index 3918bdffa..e7e84fa0a 100644
--- a/src/cpp/preprocessor.c
+++ b/src/cpp/preprocessor.c
@@ -255,7 +255,10 @@ static FILE *search_sysinc(const char *prevdir, const char *path, char **pfn) {
 }
 
 static void handle_include(const char *p, Stream *stream, bool is_next) {
-  const char *orgp = p = preprocess_one_line(p, stream, NULL);;
+  const char *orgp = p = skip_whitespaces(p);
+
+  if (*p != '<')
+    p = preprocess_one_line(p, stream, NULL);;
   char close;
   bool sys = false;