Fix audio driver starting in debug mode, add -diagnostics mode

GpCommon/IGpLogDriver.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <cstdarg>
+#include <stdio.h>
+
+struct IGpLogDriver
+{
+	enum Category
+	{
+		Category_Information,
+		Category_Warning,
+		Category_Error,
+	};
+
+	virtual void VPrintf(Category category, const char *fmt, va_list args) = 0;
+	virtual void Shutdown() = 0;
+
+	void Printf(Category category, const char *fmt, ...);
+};
+
+
+inline void IGpLogDriver::Printf(Category category, const char *fmt, ...)
+{
+	va_list args;
+	va_start(args, fmt);
+	this->VPrintf(category, fmt, args);
+	va_end(args);
+}