External Builds created AVRO-1358:
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Summary: internal version of jansson exports the jansson symbols
which collide with json-c and jansson libraries
Key: AVRO-1358
URL: https://issues.apache.org/jira/browse/AVRO-1358
Project: Avro
Issue Type: Bug
Components: c
Affects Versions: 1.7.4
Environment: linux
Reporter: External Builds
The 1.7.x version of AVRO includes an "internal" copy of jansson library, but
it also exports all of the jansson symbols which will collide with other
libraries. The symbol 'json_object_get' will collide with the json-c library
and all of the 'json_*' symbols collide with the external jansson library.
If you don't want to have an external dependency on 'jansson' then it seems
that the symbols will need to have a hidden visibility or some other mechanism
to keep them from being exported with the AVRO library.
As a temporary solution we have wrapped the internal jansson functions with
this so they are hidden:
#pragma GCC visibility push(hidden)
json_function()
#pragma GCC visibility pop
Many other solutions exist. I don't see that having an external dependency is
such a drawback, as many other open source packages have dependencies on other
open source packages, but any solution would be appreciated.
Thanks!
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