[PATCH] D56026: [libcxxabi] Support building hermetic static library

[Petr Hosek via Phabricator]

phosek created this revision.
phosek added reviewers: ldionne, EricWF.
Herald added subscribers: libcxx-commits, christof, mgorny.

This is useful when the static libc++abi library is being linked into
shared libraries that may be used in with other shared libraries that
use different C++ library. We want to avoid avoid exporting libc++abi
or libc++ symbols in those cases. This achieved by a new CMake option
which can be enabled by libc++abi vendors as needed.


Repository:
  rCXXA libc++abi

https://reviews.llvm.org/D56026

Files:
  libcxxabi/CMakeLists.txt
  libcxxabi/cmake/Modules/HandleLibcxxabiFlags.cmake
  libcxxabi/src/CMakeLists.txt

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