To disable deprecation, use _CRT_SECURE_NO_WARNINGS

void _setDestination(const char* name)
    {
        if (name==NULL) {
            stream = stdout;
        }
        else {
            stream = fopen(name,"w");
            if (stream == NULL) {
                stream = stdout;
            }
        }
    }

Severity    Code    Description Project File    Line    Category    Source  Suppression State   Tool
Error   C4996   'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. OpenARK-test    c:\opencv\build\include\opencv2\flann\logger.h  66      Build