[libcxx-commits] [PATCH] D130176: [libc++] Take advantage of -fexperimental-library in libc++

[Louis Dionne via Phabricator via libcxx-commits]

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When -fexperimental-library is passed, libc++ will now pick up the
appropriate __has_feature flag defined by Clang to enable the
experimental library features.

As a fly-by, also update the documentation for the various TSes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D130176

Files:
  libcxx/docs/DesignDocs/ExperimentalFeatures.rst
  libcxx/docs/ReleaseNotes.rst
  libcxx/docs/Status/Cxx20.rst
  libcxx/docs/UsingLibcxx.rst
  libcxx/include/__config
  libcxx/test/libcxx/experimental/fexperimental-library.compile.pass.cpp
  libcxx/utils/libcxx/test/params.py

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