From 3cf3b73ffc6881d5428a735736a347f6e143b366 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 29 Feb 2016 10:57:40 +0200
Subject: Implement auxiliary dependency database (.d files), use in
 cxx.compile

This is part of the "High Fidelity Build" work.
---
 build2/cxx/utility.cxx | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'build2/cxx/utility.cxx')

diff --git a/build2/cxx/utility.cxx b/build2/cxx/utility.cxx
index 0a26aea..15980d4 100644
--- a/build2/cxx/utility.cxx
+++ b/build2/cxx/utility.cxx
@@ -25,5 +25,19 @@ namespace build2
 
       append_options (args, l, var);
     }
+
+    void
+    hash_lib_options (sha256& csum, target& l, const char* var)
+    {
+      using namespace bin;
+
+      for (target* t: l.prerequisite_targets)
+      {
+        if (t->is_a<lib> () || t->is_a<liba> () || t->is_a<libso> ())
+          hash_lib_options (csum, *t, var);
+      }
+
+      hash_options (csum, l, var);
+    }
   }
 }
-- 
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