After the solver updates less logs is written out

[Diddlik]

What version of OR-Tools and what language are you using?
Version: main/v9.5 and 8,2
Language: C++

Which solver are you using (e.g. CP-SAT, Routing Solver, GLOP, BOP, Gurobi)
GLOP

What operating system (Linux, Windows, ...) and version?
Windows

What did you do?

I have updated the solver from 8.2 to 9.5 and noticed that now significantly fewer logs are written out.
See the picture. Left is glop with ortools 9.5, right glop with ortools 8.2
Has something happened to logging in the time?

		//turn_on_GLOP_logging_if_necessary();
		if (solver_args.verbose > 0 && solver_args.mode_type != MODETYPE::MULTI) {
			{
				my_cout << "Initializing google logging\n";
				char myargv[256];
				sprintf(myargv, "GLOP_%s_%d_", _solver_parameter_ptr->optname, id);
				google::InitGoogleLogging(myargv);
				FLAGS_log_dir.Set(folder_path);
				my_cout << "Setting Glop output folder to " << FLAGS_log_dir.Get() << endl;
				//FLAGS_v.Set(2);
				FLAGS_v.Set(solver_args.verbose);
				FLAGS_minloglevel.Set(0);
			}
		}

What did you expect to see
I except to see similar logs

What did you see instead?
fewer logs as expected

[lperron]

Most of the logs are printed on stout.

[Diddlik]

Most of the logs are printed on stout.

is it possible to forward logs from stout?

[Mizux]

FYI: Once we get the new release https://github.com/abseil/abseil-cpp we will migrate to each absl::log implementation which could support logging callback.
ref: https://abseil.io/docs/cpp/guides/logging#output
Let's ping us once the abseil-cpp release and its integration is done...
current status: stall (waiting abseil-cpp release)

[Diddlik]

@Mizux
Hello, as agreed, there is a new version absl. Here is the ping!

Thanks in advance!

[Mizux]

FYI, last abseil-cpp 20230125.0 has just been integrated on main by Laurent last week...
We expect to start some release dry run/rc this week (mostly to update/fix our hundreds dockerfile) to release next week...

[Diddlik]

@Mizux but a compiled lib does not exist yet?