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https://issues.apache.org/jira/browse/HDFS-16463?focusedWorklogId=778994&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-778994
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ASF GitHub Bot logged work on HDFS-16463:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 07/Jun/22 11:12
            Start Date: 07/Jun/22 11:12
    Worklog Time Spent: 10m 
      Work Description: GauthamBanasandra commented on code in PR #4370:
URL: https://github.com/apache/hadoop/pull/4370#discussion_r891085844


##########
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/x-platform/c-api/dirent.cc:
##########
@@ -0,0 +1,100 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <algorithm>
+#include <cerrno>
+#include <iostream>
+#include <iterator>
+#include <system_error>
+#include <variant>
+
+#include "x-platform/c-api/dirent.h"
+#include "x-platform/dirent.h"
+
+#if defined(WIN32) && defined(__cplusplus)

Review Comment:
   I've put the `extern "C"` in the `c-api/dirent.h` header file. I thought 
that I had to enclose the implementation as well. I just removed the `extern 
"C"` enclosure in the implementation and I was able to build fine on both 
Windows and Ubuntu. I ran the tests on both the platforms and they're working 
fine -
   
   ## Windows 10
   
![image](https://user-images.githubusercontent.com/10280768/172365616-57f1b051-e010-4f18-bc99-344cfb1496af.png)
   
   ## Ubuntu Focal
   
![image](https://user-images.githubusercontent.com/10280768/172365730-df247cb8-8e7b-44f3-b094-a22dffa76d53.png)
   
   I've removed the `extern "C"` enclosure from the implementation now, since 
it's redundant.





Issue Time Tracking
-------------------

    Worklog Id:     (was: 778994)
    Time Spent: 4h 50m  (was: 4h 40m)

> Make dirent cross platform compatible
> -------------------------------------
>
>                 Key: HDFS-16463
>                 URL: https://issues.apache.org/jira/browse/HDFS-16463
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: libhdfs++
>    Affects Versions: 3.4.0
>         Environment: Windows 10
>            Reporter: Gautham Banasandra
>            Assignee: Gautham Banasandra
>            Priority: Major
>              Labels: libhdfscpp, pull-request-available
>          Time Spent: 4h 50m
>  Remaining Estimate: 0h
>
> [jnihelper.c|https://github.com/apache/hadoop/blob/1fed18bb2d8ac3dbaecc3feddded30bed918d556/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/jni_helper.c#L28]
>  in HDFS native client uses *dirent.h*. This header file isn't available on 
> Windows. Thus, we need to replace this with a cross platform compatible 
> implementation for dirent.



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