From 323585564fc7a5b0457926846a98493feb77f37d Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 21 Jul 2022 12:08:34 +0200
Subject: Add link to HOWTO entry in conditional dependency declaration warning

---
 libbuild2/parser.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'libbuild2/parser.cxx')

diff --git a/libbuild2/parser.cxx b/libbuild2/parser.cxx
index 0ce0cfe..23e9d0e 100644
--- a/libbuild2/parser.cxx
+++ b/libbuild2/parser.cxx
@@ -2402,7 +2402,9 @@ namespace build2
           info << "instead use 'include' prerequisite-specific variable to "
                << "conditionally include prerequisites" <<
           info << "for example: "
-               << "<target>: <prerequisite>: include = (<condition>)";
+               << "<target>: <prerequisite>: include = (<condition>)" <<
+          info << "for details, see https://github.com/build2/HOWTO/blob/"
+               << "master/entries/keep-build-graph-config-independent.md";
       }
     }
 
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