From c501fedf77210f8549a716c8d7838ad088f11769 Mon Sep 17 00:00:00 2001
From: Joel Rosdahl <joel@rosdahl.net>
Date: Tue, 15 Jul 2025 16:48:00 +0200
Subject: [PATCH] fix: Include MSVC variables INCLUDE and EXTERNAL_INCLUDE in
 input hash

See discussion #1606.
---
 src/ccache/ccache.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ccache/ccache.cpp b/src/ccache/ccache.cpp
index d727ba81..30da9cae 100644
--- a/src/ccache/ccache.cpp
+++ b/src/ccache/ccache.cpp
@@ -2086,6 +2086,8 @@ get_manifest_key(Context& ctx, Hash& hash)
     "OBJCPLUS_INCLUDE_PATH",        // Clang
     "CLANG_CONFIG_FILE_SYSTEM_DIR", // Clang
     "CLANG_CONFIG_FILE_USER_DIR",   // Clang
+    "INCLUDE",                      // MSVC
+    "EXTERNAL_INCLUDE",             // MSVC
     nullptr,
   };
   for (const char** p = envvars; *p; ++p) {
-- 
2.47.3