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Make libprotobuf symbols local on OSX #8346

Merged

TeBoring merged 1 commit into protocolbuffers:master from rowillia:hide_protobuf_symbols

Apr 24, 2021

Commits on Feb 25, 2021

Make libprotobuf symbols local on OSX

@gnossen gave a great overview in grpc/grpc#24992 of the overall problem.

If a python process using both protobuf _and_ another native library linking in libprotobuf
frequently can cause crashes.  This seems to frequently affect tensorflow as well:

tensorflow/tensorflow#8394,
tensorflow/tensorflow#9525 (comment)
tensorflow/tensorflow#24976,
tensorflow/tensorflow#35573,
https://github.com/tensorflow/tensorflow/blob/v2.0.0/tensorflow/contrib/makefile/rename_protobuf.sh,
tensorflow/tensorflow#16104

Testing locally this fixes both crashes when linking in multiple versions of protobuf
and fixes `DescriptorPool` clashes as well (e.g. Python and Native code import different versions of the same message).

Roy Williams committed Feb 25, 2021