/**
* trace_init_backends:
* @file: Name of trace output file; may be NULL.
- * Corresponds to commandline option "-trace file=...".
+ * Corresponds to commandline option "--trace file=...".
*
* Initialize the tracing backend.
*
/**
* trace_init_file:
* @file: Name of trace output file; may be NULL.
- * Corresponds to commandline option "-trace file=...".
+ * Corresponds to commandline option "--trace file=...".
*
* Record the name of the output file for the tracing backend.
* Exits if no selected backend does not support specifying the