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Posted to hdfs-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2022/07/16 18:22:00 UTC
[jira] [Updated] (HDFS-16464) Create only libhdfspp static libraries for Windows
[ https://issues.apache.org/jira/browse/HDFS-16464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HDFS-16464:
----------------------------------
Labels: libhdfscpp pull-request-available (was: libhdfscpp)
> 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
> Time Spent: 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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