tree be6b6c8326a97e5b82b92d3103baa38723f2e730
parent 8541d988375e4f0392d21ff46ee1f96975592834
author Louis Dionne <ldionne.2@gmail.com> 1629747156 -0400
committer Copybara-Service <copybara-worker@google.com> 1634033427 -0700

[libc++] Add an option to disable wide character support in libc++

Some embedded platforms do not wish to support the C library functionality
for handling wchar_t because they have no use for it. It makes sense for
libc++ to work properly on those platforms, so this commit adds a carve-out
of functionality for wchar_t.

Unfortunately, unlike some other carve-outs (e.g. random device), this
patch touches several parts of the library. However, despite the wide
impact of this patch, I still think it is important to support this
configuration since it makes it much simpler to port libc++ to some
embedded platforms.

Differential Revision: https://reviews.llvm.org/D111265

GitOrigin-RevId: f4c1258d5633fcf06385ff3fd1f4bf57ab971964