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https://issues.apache.org/jira/browse/GEODE-5079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Blake Bender closed GEODE-5079.
-------------------------------
> Investigate why dynamic_cast fails when visibility is set to 'hidden' by
> default in Clang
> -----------------------------------------------------------------------------------------
>
> Key: GEODE-5079
> URL: https://issues.apache.org/jira/browse/GEODE-5079
> Project: Geode
> Issue Type: Bug
> Components: native client
> Reporter: Ryan McMahon
> Priority: Major
>
> We should investigate why symbols aren't fully exported when specifying
> 'CXX_VISIBILITY_PRESET hidden' and aliasing with the 'using' keyword i.e.
> ```
> using CacheableBytes = CacheableArray<int8_t, GeodeTypeIds::CacheableBytes>
> ```
> The immediate fix was to set visibility to 'default' for Clang only
> (https://issues.apache.org/jira/browse/GEODE-5067), but it would be good to
> better understand 'hidden' visibility causes problems.
> The issue can be reproduced by reverting Clang back to 'default' visibility
> and running the testThinClientBigValue test.
> We identified that if we do not alias with 'using' and explicitly define the
> class e.g. CacheableBytes and decorate that class with APACHE_GEODE_EXPORT,
> then this seems to resolve the issue when using 'hidden' by default on Clang.
> However, it seems cumbersome to explicitly define all these classes just to
> solve this particular issue.
> Some potentially relevant stackoverflow posts include:
> https://stackoverflow.com/questions/19496643/using-clang-fvisibility-hidden-and-typeinfo-and-type-erasure
> [https://stackoverflow.com/questions/5116333/dynamic-cast-failed-when-hiding-symbol]
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