[jira] [Created] (KUDU-3780) Add an option to build libkudu_client C++ library and its 3rd-party dependencies only

["Alexey Serbin (Jira)" <ji...@apache.org>]

Alexey Serbin created KUDU-3780:
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             Summary: Add an option to build libkudu_client C++ library and its 3rd-party dependencies only
                 Key: KUDU-3780
                 URL: https://issues.apache.org/jira/browse/KUDU-3780
             Project: Kudu
          Issue Type: Improvement
          Components: build
            Reporter: Alexey Serbin


At the time of writing, it's necessary to build all the 3rd-party components to produce libkudu_client.so bits.  For projects like Impala, libkudu_client.so is the only required artifact, and they need building it with a custom/specific toolchain, so sharing pre-built 3rd-party bits built a standard way it's done in Kudu isn't a viable option (i.e. Impala needs Kudu's 3rd-party components built with Impala-specific toolchain).

To reduce build times for libkudu_client as an artifact needed by Impala, it makes sense to provide a way building only 3rd-party components needed for libkudu_client (at least, for DEBUG and RELEASE build configurations).  That might be implemented as a change in build scripts' behavior when a particular environment variable specified (e.g., {{KUDU_CLIENT_ONLY}}).



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