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https://issues.apache.org/jira/browse/HDFS-16464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gautham Banasandra resolved HDFS-16464.
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Fix Version/s: 3.4.0
Resolution: Fixed
Merged PR https://github.com/apache/hadoop/pull/4571 to trunk.
> Create only libhdfspp static libraries for Windows
> --------------------------------------------------
>
> Key: HDFS-16464
> URL: https://issues.apache.org/jira/browse/HDFS-16464
> 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
> Fix For: 3.4.0
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> While building dynamic libraries (.dll) on Windows, there's a constraint that
> all the dependent libraries be linked dynamically. This poses an issue since
> Protobuf (which is an HDFS native client dependency) runs into build issues
> when linked dynamically. There are a few [warning
> notes|https://github.com/protocolbuffers/protobuf/blob/9ebb31726cef11e4e940b50ec751df4e863e3d2a/cmake/README.md#dlls-vs-static-linking]
> on the Protobuf repository's build instructions page as well.
> Thus, to keep things simple, we can resort to do only static linking and
> thereby only produce statically linked libraries on Windows. In summary,
> we'll be providing only Hadoop .lib files initially. We can aim to produce
> Hadoop .dll on Windows eventually once we're able to resolve Protobuf's .dll
> issues.
> In Hadoop CMake files, we've a function
> [hadoop_add_dual_library|https://github.com/apache/hadoop/blob/f0241ec2161f6eccdb9bdaf1cbcbee55be379217/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/CMakeLists.txt#L289-L298]
> that creates both the static an dynamic library targets. We need to replace
> all these to get only static libraries for Windows.
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