From 1ece46928dcd77d47b4875ac7edadb0c6d30c959 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sat, 29 Jul 2017 09:24:10 +0200
Subject: Delete archive before regenerating

---
 build2/cc/link.cxx | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/build2/cc/link.cxx b/build2/cc/link.cxx
index babbbed..1a5424b 100644
--- a/build2/cc/link.cxx
+++ b/build2/cc/link.cxx
@@ -1813,6 +1813,17 @@ namespace build2
         }
         catch (const system_error&) {} // Ignore errors.
       }
+      else if (lt.static_library ())
+      {
+        // We use relative paths to the object files which means we may end
+        // up with different ones depending on CWD and some implementation
+        // treat them as different archive members. So remote the file to
+        // be sure. Note that we ignore errors leaving it to the achiever
+        // to complain.
+        //
+        if (mt != timestamp_nonexistent)
+          try_rmfile (relt, true);
+      }
 
       if (verb >= 2)
         print_process (args);
-- 
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