commit ba48b8d9ffe9bf3cd76d2f84c61d9b666f190a10
Author: Richard Shaw <hobbes1069@gmail.com>
Date:   Wed Oct 7 06:46:43 2020 -0500

    streampos is in the standard library and access from ostringstream is depreciated.

diff --git a/src/flmsg.cxx b/src/flmsg.cxx
index 27d099c..4e86ddf 100644
--- a/src/flmsg.cxx
+++ b/src/flmsg.cxx
@@ -2845,7 +2845,7 @@ void rotate_log(std::string filename)
 {
 	const int n = 5; // rename existing log files to keep up to 5 old versions
 	ostringstream oldfn, newfn;
-	ostringstream::streampos p;
+	std::streampos p;
 
 	oldfn << filename << '.';
 	newfn << filename << '.';