Using CLS_LOG in React Native Logs

AppDelegate.m

RCTLogFunction CrashlyticsReactLogFunction = ^(
                                         RCTLogLevel level,
                                         __unused RCTLogSource source,
                                         NSString *fileName,
                                         NSNumber *lineNumber,
                                         NSString *message
                                         )
{
    NSString *log = RCTFormatLog([NSDate date], level, fileName, lineNumber, message);
    
    #ifdef DEBUG
        fprintf(stderr, "%s\n", log.UTF8String);
        fflush(stderr);
    #else
        CLS_LOG(@"REACT LOG: %s", log.UTF8String);
    #endif
    
    int aslLevel;
    switch(level) {
        case RCTLogLevelTrace:
            aslLevel = ASL_LEVEL_DEBUG;
            break;
        case RCTLogLevelInfo:
            aslLevel = ASL_LEVEL_NOTICE;
            break;
        case RCTLogLevelWarning:
            aslLevel = ASL_LEVEL_WARNING;
            break;
        case RCTLogLevelError:
            aslLevel = ASL_LEVEL_ERR;
            break;
        case RCTLogLevelFatal:
            aslLevel = ASL_LEVEL_CRIT;
            break;
    }
    asl_log(NULL, NULL, aslLevel, "%s", message.UTF8String);

    
};

CLS_LOG(@"REACT LOG: %s", log.UTF8String); ::::>>>>

Implicit declaration of function 'CLS_LOG' is invalid in C99