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Summary: When building with -fvisibility=hidden, some symbols do not get exported from libc++.dylib. This means that some entities are not explicitly given default visibility in the source code, and that we rely on the fact -fvisibility=default is the default. This commit explicitly gives default visibility to those symbols to avoid being dependent on the command line flags used. The commit also remove symbols from the dylib -- those symbols do not actually need to be exported from the dylib and this should not be an ABI break. Finally, in the future, we may want to mark the whole std:: namespace as having hidden visibility (to switch from opt-out to opt-in), in which case the changes done in this commit will be required. Reviewers: EricWF Subscribers: mgorny, christof, dexonsmith, libcxx-commits Differential Revision: https://reviews.llvm.org/D52662 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@345260 91177308-0d34-0410-b5e6-96231b3b80d8
This directory contains abi lists representing the symbols exported by the libc++ library. The lists are generated using sym_extract.py. Every time a symbol is added or removed from the libc++ library each of the lists *MUST* be updated to reflect the changes. TODO Add more documentation about generating and using the lists. TODO Add more documentation about the build configuration the lists are generated against.