Mention --trace in cliapp(5) logging section

1 files changed, 14 insertions, 0 deletions

diff --git a/cliapp.5 b/cliapp.5
index c668b6e..2b114fb 100644
--- a/cliapp.5
+++ b/cliapp.5
@@ -115,6 +115,20 @@ output for options starting with
 for details.
 Logging can happen to a file or the system log.
 Log files can be rotated automatically based on size.
+.PP
+The
+.B \-\-trace
+option enables additional debug logging,
+which is usually only useful for programmers.
+The option configures the
+.B tracing
+library for Python,
+by Lars Wirzenius,
+which allows logging values of variables and other debug information in a
+way that is very lightweight when the tracing is turned off.
+The option specifies for which source code files to turn on tracing.
+The actual logging happens via the normal Python logging facilities,
+at the debug level.
 .SH FILES
 .B cliapp
 reads a list of configuration files at startup,