osd/windows: Send logerror to stderr if no debugger is attached and -oslog is on.

src/osd/windows/winmain.cpp

@@ -6,20 +6,6 @@
 //
 //============================================================
 
-// only for oslog callback
-#include <functional>
-
-// standard windows headers
-#include <windows.h>
-#include <commctrl.h>
-#include <mmsystem.h>
-#include <tchar.h>
-#include <io.h>
-
-// standard C headers
-#include <ctype.h>
-#include <stdarg.h>
-
 // MAME headers
 #include "emu.h"
 #include "emuopts.h"
@@ -34,6 +20,18 @@
 #include "modules/diagnostics/diagnostics_module.h"
 #include "modules/monitor/monitor_common.h"
 
+// standard C headers
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+// standard windows headers
+#include <windows.h>
+#include <commctrl.h>
+#include <mmsystem.h>
+#include <tchar.h>
+#include <io.h>
+
 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
 #include <wrl/client.h>
 using namespace Windows::Storage;
@@ -475,6 +473,8 @@ void windows_osd_interface::output_oslog(const char *buffer)
 {
 	if (IsDebuggerPresent())
 		win_output_debug_string_utf8(buffer);
+	else
+		fputs(buffer, stderr);
 }
 
 
@@ -573,10 +573,7 @@ void windows_osd_interface::init(running_machine &machine)
 
 	// hook up the debugger log
 	if (options.oslog())
-	{
-		using namespace std::placeholders;
-		machine.add_logerror_callback(std::bind(&windows_osd_interface::output_oslog, this, _1));
-	}
+		machine.add_logerror_callback(&windows_osd_interface::output_oslog);
 
 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
 	// crank up the multimedia timer resolution to its max

src/osd/windows/winmain.h

@@ -312,7 +312,7 @@ protected:
 
 private:
 	virtual void osd_exit() override;
-	void output_oslog(const char *buffer);
+	static void output_oslog(const char *buffer);
 
 	windows_options &   m_options;
 

src/osd/windows/winutf8.cpp

@@ -6,15 +6,15 @@
 //
 //============================================================
 
-// standard windows headers
-#include <windows.h>
-#include <shellapi.h>
-#include <stdlib.h>
-
 // MAMEOS headers
 #include "winutf8.h"
 #include "strconv.h"
 
+#include <stdlib.h>
+
+// standard windows headers
+#include <shellapi.h>
+
 
 //============================================================
 //  win_output_debug_string_utf8

src/osd/windows/winutf8.h

@@ -6,11 +6,15 @@
 //
 //============================================================
 
-#ifndef __WINUTF8__
-#define __WINUTF8__
+#ifndef MAME_OSD_WINDOWS_WINUTF8_H
+#define MAME_OSD_WINDOWS_WINUTF8_H
+
+#pragma once
 
 #include "osdcore.h"
 
+#include <windows.h>
+
 // wrappers for kernel32.dll
 void win_output_debug_string_utf8(const char *string);
 
@@ -18,8 +22,15 @@ void win_output_debug_string_utf8(const char *string);
 int win_message_box_utf8(HWND window, const char *text, const char *caption, UINT type);
 BOOL win_set_window_text_utf8(HWND window, const char *text);
 std::string win_get_window_text_utf8(HWND window);
-HWND win_create_window_ex_utf8(DWORD exstyle, const char* classname, const char* windowname, DWORD style,
-								int x, int y, int width, int height, HWND wndparent, HMENU menu,
-								HINSTANCE instance, void* param);
+HWND win_create_window_ex_utf8(
+		DWORD exstyle,
+		const char *classname,
+		const char *windowname,
+		DWORD style,
+		int x, int y, int width, int height,
+		HWND wndparent,
+		HMENU menu,
+		HINSTANCE instance,
+		void *param);
 
-#endif // __WINUTF8__
+#endif // MAME_OSD_WINDOWS_WINUTF8_H