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https://issues.apache.org/jira/browse/HADOOP-6069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HADOOP-6069:
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Attachment: hadoop-6069.txt
hadoop-6069-guts.txt
This patch gets rid of the dynamic loading of zlib from the native code. I've
attached two versions, one which includes just the changes to the autoconf
source files (-guts), and another which has the full patch to be applied to
trunk.
This also cleans up the autotools setup a bit:
- There's no need to check HAVE_FOO_H cpp conditionals since we can just make
configure error out at that point if they aren't found
- AC_HEADER_STDC and AC_C_CONST are considered obsolescent since any modern
system (where one might compile Hadoop) will pass these checks
- AC_CHECK_FUNCS([memset]) was unnecessary since HAVE_MEMSET was never checked
> Remove explicit dynamic loading of libz in native code
> ------------------------------------------------------
>
> Key: HADOOP-6069
> URL: https://issues.apache.org/jira/browse/HADOOP-6069
> Project: Hadoop Core
> Issue Type: Improvement
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-6069-guts.txt, hadoop-6069.txt
>
>
> The native zlib code currently uses dlopen/dlsym to dynamically load libz.
> This used to make sense when there was an lzo option (so you could load
> libhadoop for lzo purposes without requiring libz as well). Now that
> libhadoop only has zlib as an option, it makes sense to just add it as an ld
> flag and let it be automatically loaded as a shlib dependency. I also doubt
> that there are any distros where libz isn't required by the base system.
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