log: fix some functionality and wrappers

examples/cxx-api/demomain.cc

@@ -5,7 +5,7 @@
 
 int main()
 {
-	Yosys::log_streams.push_back(&std::cout);
+	Yosys::log_sinks.push_back(std::make_unique<Yosys::ConsoleLogSink>());
 	Yosys::log_error_stderr = true;
 
 	Yosys::yosys_setup();

kernel/driver.cc

@@ -406,6 +406,7 @@ int main(int argc, char **argv)
 
 		if (log_errfile == NULL) {
 			log_sinks.push_back(std::make_unique<ConsoleLogSink>());
+			log_error_stderr = true;
 		} else {
 			log_sinks.push_back(std::make_unique<StderrLogSink>());
 		}

kernel/log.cc

@@ -102,7 +102,7 @@ void FileLogSink::flush()
 
 void ConsoleLogSink::log(const LogMessage &msg)
 {
-	FILE *file = msg.severity == LogSeverity::LOG_ERROR ? stderr : stdout;
+	FILE *file = (msg.severity == LogSeverity::LOG_ERROR && log_error_stderr) ? stderr : stdout;
 	fputs(msg.legacy_msg.c_str(), file);
 }
 

pyosys/generator.py

@@ -132,6 +132,8 @@ global_denylist = frozenset(
         "log_verific_callback",
         # incomplete type
         "yosys_get_tcl_interp",
+        # unique ptr vector
+        "log_sinks",
     }
 )
 pyosys_headers = [

pyosys/wrappers_tpl.cc

@@ -168,7 +168,7 @@ namespace pyosys {
 		m.doc() = "python access to libyosys";
 
 		if (!yosys_already_setup()) {
-			log_streams.push_back(&std::cout);
+			log_sinks.push_back(std::make_unique<ConsoleLogSink>());
 			log_error_stderr = true;
 			yosys_setup();