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https://issues.apache.org/jira/browse/HDFS-2042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045213#comment-13045213
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Eli Collins commented on HDFS-2042:
-----------------------------------

Our configure file already has compiler-specific sections for setting cflags 
for particular compilers, but I think we should do this via autotools.

> Require c99 when building libhdfs
> ---------------------------------
>
>                 Key: HDFS-2042
>                 URL: https://issues.apache.org/jira/browse/HDFS-2042
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: libhdfs
>            Reporter: Eli Collins
>            Priority: Minor
>
> Per the discussion in HDFS-1619, libhdfs uses some c99 features, therefore we 
> should use compile with c99 standard flags (eg c99 or gnu99 when using gcc) 
> when building it. We could do this with autotools via AC_PROG_CC_C99 (which 
> requires a more recent autotools) or by setting CLFAGS in 
> src/c++/libhdfs/configure. We should perhaps rename src/c++ to src/c while 
> we're at it since libhdfs is not written in c++ and libhdfs is the only 
> subdirectory.

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