[jira] [Created] (HDFS-11971) libhdfs++: A few portability issues

["Anatoli Shein (JIRA)" <ji...@apache.org>]

Anatoli Shein created HDFS-11971:
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             Summary: libhdfs++: A few portability issues
                 Key: HDFS-11971
                 URL: https://issues.apache.org/jira/browse/HDFS-11971
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Anatoli Shein


I recently encountered a few portability issues with libhdfs++ while trying to build it as a stand alone project (and also as part of another Apache project).

1. Method fixCase in configuration.h file produces a warning "conversion to ‘char’ from ‘int’ may alter its value [-Werror=conversion]" which does not allow libhdfs++ to be compiled as part of the codebase that treats such warnings as errors (can be fixed with a simple cast).

2. In CMakeLists.txt file (in libhdfspp directory) we do find_package(Threads) however we do not link it to the targets (e.g. hdfspp_static), which causes the build to fail with pthread errors. After the Threads package is found we need to link it using ${CMAKE_THREAD_LIBS_INIT}.

3. All the tools and examples fail to build as part of a standalone libhdfs++ because they are missing multiple libraries such as protobuf, ssl, pthread, etc. This happens because we link them to a shared library hdfspp instead of hdfspp_static library. We should either link all the tools and examples to hdfspp_static library or explicitly add linking to all missing libraries for each tool/example.



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