main: set R600_DEBUG=nodcc ourselves if we have a sub-command.

We know it's strictly better than not having it in the current state,
so might as well, if we know it'll apply to clients as well.

src/main.cpp

@@ -98,6 +98,24 @@ int main(int argc, char **argv)
 		}
 	}
 
+	// If we're going to execute something monolithic, might as well set this since it'll extend to our clients
+	if ( g_nSubCommandArg != 0 )
+	{
+		const char *pchR600Debug = getenv( "R600_DEBUG" );
+
+		if ( pchR600Debug == nullptr )
+		{
+			setenv( "R600_DEBUG", "nodcc", 1 );
+		}
+		else if ( strstr( pchR600Debug, "nodcc" ) == nullptr )
+		{
+			std::string strPreviousR600Debug = pchR600Debug;
+			strPreviousR600Debug.append( ",nodcc" );
+			setenv( "R600_DEBUG", strPreviousR600Debug.c_str(), 1 );
+		}
+
+	}
+	
 	if ( bSleepAtStartup == true )
 	{
 	 	sleep( 2 );