From 40863a594372ede117533d5c0970a96d60e34371 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 22 Apr 2021 10:10:34 +0200
Subject: Incorporate project environment checksum into cc::compiler_info cache
 key

---
 libbuild2/scope.hxx | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'libbuild2/scope.hxx')

diff --git a/libbuild2/scope.hxx b/libbuild2/scope.hxx
index 9f88dc9..f78a565 100644
--- a/libbuild2/scope.hxx
+++ b/libbuild2/scope.hxx
@@ -501,6 +501,12 @@ namespace build2
       // See also auto_project_env below.
       //
       vector<const char*> environment;
+
+      // A checksum of the above environment variables (empty if there are
+      // none). This can be used to take into account project environment
+      // when, for example, caching environment-sensitive information.
+      //
+      string environment_checksum;
     };
 
     unique_ptr<root_extra_type> root_extra;
-- 
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