systemc: Add the deprecated sc_trace_delta_cycles function.

This function enables or disables tracing of delta cycles in a
particular trace file.

Change-Id: I53164a792856d071de1fefc76977cca8eb5fd735
Reviewed-on: https://gem5-review.googlesource.com/11267
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

src/systemc/ext/utils/_using.hh

@@ -71,6 +71,7 @@ using sc_core::sc_create_vcd_trace_file;
 using sc_core::sc_close_vcd_trace_file;
 using sc_core::sc_write_comment;
 using sc_core::sc_trace;
+using sc_core::sc_trace_delta_cycles;
 
 using sc_core::sc_exception;
 

src/systemc/ext/utils/sc_trace_file.hh

@@ -167,6 +167,9 @@ void sc_trace(sc_trace_file *, const sc_dt::uint64 *,
 void sc_trace(sc_trace_file *, const unsigned int &,
               const std::string &, const char **enum_literals);
 
+// Deprecated
+void sc_trace_delta_cycles(sc_trace_file *, bool on=true);
+
 template <class T>
 void
 sc_trace(sc_trace_file *, const sc_signal_in_if<T> &, const std::string &)

src/systemc/utils/sc_trace_file.cc

@@ -407,4 +407,10 @@ sc_trace(sc_trace_file *, const unsigned int &,
     warn("%s not implemented.\n", __PRETTY_FUNCTION__);
 }
 
+void
+sc_trace_delta_cycles(sc_trace_file *, bool on)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
 } // namespace sc_core