[PATCH] D17456: [libcxx] Reorganize _LIBCPP_LOCALE__L_EXTENSIONS

[Ben Craig via cfe-commits]

bcraig created this revision.
bcraig added reviewers: scshunt, howard.hinnant, jroelofs, mclow.lists.
bcraig added a subscriber: cfe-commits.
Herald added a subscriber: jfb.

This is one part of many of a locale refactor. See http://reviews.llvm.org/D17146 for an idea of where this is going.

Instead of checking _LIBCPP_LOCALE__L_EXTENSIONS all over, instead check it once, and define the various *_l symbols once.  The private redirector symbol names are all prefixed with _CXX_* so that they won't conflict with user symbols, and so they won't conflict with future C library symbols.  In particular, glibc likes providing private symbols such as __locale_t, so we should follow a different naming pattern (like _CXX_*) to avoid problems on that front.

Tested on Linux with glibc.  Hoping for the best on OSX and the various BSDs.

http://reviews.llvm.org/D17456

Files:
  include/__bsd_locale_defaults.h
  include/__bsd_locale_fallbacks.h
  include/locale
  src/locale.cpp

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