added support for Warninglevel

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@317

src/dosbox.cpp

@@ -40,7 +40,7 @@
  /* NEEDS A CLEANUP */
 char dosbox_basedir[CROSS_LEN];
 Config * control;
-
+Bitu errorlevel=1; //during startup display reason for Exits
 //The whole load of startups for all the subfunctions
 
 void MSG_Init(Section_prop *);
@@ -132,7 +132,8 @@ void DOSBOX_RunMachine(void){
 static void DOSBOX_RealInit(Section * sec) {
 	Section_prop * section=static_cast<Section_prop *>(sec);
 	/* Initialize some dosbox internals */
-	LastTicks=GetTicks();
+	errorlevel=section->Get_int("WARNINGS");
+        LastTicks=GetTicks();
 	DOSBOX_SetLoop(&Normal_Loop);
 	MSG_Init(section);
 }

src/gui/sdlmain.cpp

@@ -499,8 +499,8 @@ int main(int argc, char* argv[]) {
 		control->StartUp();
 		/* Shutdown everything */
 	} catch (char * error) {
-		LOG_ERROR("Exit to error %s",error);
+		LOG_ERROR("Exit to error: %s",error);
 	}
 	GFX_Stop();
 	return 0;
-};
+};

src/misc/support.cpp

@@ -214,18 +214,21 @@ void S_Warn(char * format,...) {
 	GFX_ShowMsg(buf);
 #endif
 }
-
+char buf[1024];           //global as else it doesn't always gets thrown right (linux/gcc2.95)
 void E_Exit(char * format,...) {
     
-	char buf[1024];
-
+//	char buf[1024];    //see above
+        if(errorlevel>=1){
+	
 	va_list msg;
-	strcpy(buf,"EXIT:");
 	va_start(msg,format);
-	vsprintf(buf+strlen(buf),format,msg);
+	vsprintf(buf,format,msg);
 	va_end(msg);
     
 	strcat(buf,"\n");
-	printf(buf);
+	} else  {
+	strcpy(buf,"an unsupported feature\n");
+	}
+      
 	throw(buf);
-};
+};