From a5385cebf4e64a0080a758515f40c871814750ed Mon Sep 17 00:00:00 2001
From: Christian Helmuth <christian.helmuth@genode-labs.com>
Date: Fri, 7 May 2021 08:24:52 +0200
Subject: [PATCH] block_cache: explicitly instantiate template function

The explicit instantiation is required because the function is defined
in the compilation unit only but referenced externally.

Fixes #4108
---
 repos/os/src/server/block_cache/main.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/repos/os/src/server/block_cache/main.cc b/repos/os/src/server/block_cache/main.cc
index c0ffb1c128..b2af7b6345 100644
--- a/repos/os/src/server/block_cache/main.cc
+++ b/repos/os/src/server/block_cache/main.cc
@@ -44,6 +44,9 @@ void Driver<POLICY>::Policy::sync(const typename POLICY::Element *e, char *dst)
 	}
 }
 
+/* explicit instantiation for external reference */
+template void Driver<Policy>::Policy::sync(const typename Policy::Element *, char *);
+
 
 struct Main
 {