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https://issues.apache.org/jira/browse/HDFS-14394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akira Ajisaka updated HDFS-14394:
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Fix Version/s: 3.2.2
Cherry-picked this to branch-3.2 to apply HADOOP-17196 cleanly.
> Add -std=c99 / -std=gnu99 to libhdfs compile flags
> --------------------------------------------------
>
> Key: HDFS-14394
> URL: https://issues.apache.org/jira/browse/HDFS-14394
> Project: Hadoop HDFS
> Issue Type: Task
> Components: hdfs-client, libhdfs, native
> Reporter: Sahil Takiar
> Assignee: Sahil Takiar
> Priority: Major
> Fix For: 3.3.0, 3.2.2
>
> Attachments: HDFS-14394.001.patch
>
>
> libhdfs compilation currently does not enforce a minimum required C version.
> As of today, the libhdfs build on Hadoop QA works, but when built on a
> machine with an outdated gcc / cc version where C89 is the default,
> compilation fails due to errors such as:
> {code}
> /build/hadoop/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/jclasses.c:106:5:
> error: ‘for’ loop initial declarations are only allowed in C99 mode
> for (int i = 0; i < numCachedClasses; i++) {
> ^
> /build/hadoop/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/jclasses.c:106:5:
> note: use option -std=c99 or -std=gnu99 to compile your code
> {code}
> We should add the -std=c99 / -std=gnu99 flags to libhdfs compilation so that
> we can enforce C99 as the minimum required version.
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