Make MSVC compile once again.

src/emu/cpu/m37710/m37710op.h

@@ -2832,7 +2832,7 @@ TABLE_OPCODES3 =
 	O(200),O(200),O(200),O(200),O(200),O(200),O(200),O(200)
 };
 
-extern int m37710_irq_levels[M37710_LINE_MAX];
+extern const int m37710_irq_levels[M37710_LINE_MAX];
 
 /* Assert or clear a line on the CPU */
 TABLE_FUNCTION(void, set_line, (m37710i_cpu_struct *cpustate, int line, int state))

src/mame/video/n64.c

@@ -538,7 +538,7 @@ VIDEO_START(n64)
 
 	for (i = 0; i < 0x4000; i++)
 	{
-		gamma_dither_table[i] = sqrt(i);
+		gamma_dither_table[i] = sqrt((float)i);
 		gamma_dither_table[i] <<= 1;
 	}
 

src/osd/windows/vconv.c

@@ -138,6 +138,8 @@ static const translation_info ld_translate[] =
 	{ 0,		"-WO",						"" },
 	{ 0,		"-mconsole",				"/subsystem:console" },
 	{ 0,		"-mwindows",				"/subsystem:windows" },
+	{ 0,		"-municode",				"" },
+	{ 0,		"-static-libgcc",			"" },
 	{ 0,		"-shared",					"/dll" },
 	{ 0 }
 };

src/osd/windows/windows.mak

@@ -143,6 +143,9 @@ endif
 # disable function pointer warnings in C++ which are evil to work around
 CPPONLYFLAGS += /wd4191 /wd4060 /wd4065 /wd4640
 
+# explicitly set the entry point for UNICODE builds
+LDFLAGS += /ENTRY:wmainCRTStartup
+
 # add some VC++-specific defines
 DEFS += -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -DXML_STATIC -D__inline__=__inline -Dsnprintf=_snprintf
 

src/osd/windows/winmain.c

@@ -260,7 +260,7 @@ static void winui_output_error(void *param, const char *format, va_list argptr)
 //  utf8_main
 //============================================================
 
-int main(int argc, char **argv)
+int main(int argc, char *argv[])
 {
 	char *ext;