[PATCH] D37375: [libcxx] Test case for the experimental library visibility macros

[Hamza Sood via Phabricator via cfe-commits]

hamzasood created this revision.

This patch adds a test case to ensure that every library header uses the correct visibility macros.
libc++ headers should use _LIBCPP_* macros whereas libc++experimental headers should use _LIBCPPX_* macros.

This was originally part of https://reviews.llvm.org/D37182, but it's been taken out for separate review as requested.
It's dependent on the aforementioned patch; the test will fail until that patch has been applied.


https://reviews.llvm.org/D37375

Files:
  test/libcxx/selftest/experimental_visibility.sh.cpp
  utils/check_experimental_visibility.py
  utils/libcxx/test/config.py

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