[libcxx-commits] [PATCH] D108630: [libc++] Remove _LIBCPP_HAS_NO_LONG_LONG in favour of using_if_exists

[Louis Dionne via Phabricator via libcxx-commits]

ldionne created this revision.
ldionne added reviewers: dim, emaste.
Herald added subscribers: krytarowski, arichardson.
ldionne requested review of this revision.
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Herald added a subscriber: libcxx-commits.
Herald added a reviewer: libc++.

_LIBCPP_HAS_NO_LONG_LONG was only defined on FreeBSD. Instead, use the
using_if_exists attribute to skip over declarations that are not available
on the base system. Note that there's an annoying limitation that we can't
conditionally define a function based on whether the base system provides
a function, so for example we still need preprocessor logic to define the
abs() and div() overloads.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D108630

Files:
  libcxx/include/__config
  libcxx/include/cstdlib
  libcxx/include/cwchar
  libcxx/include/stdlib.h

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