[all-commits] [llvm/llvm-project] 1939eb: [libc++] Disable int128_t and ship filesystem on M...

[Louis Dionne via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1939eb3dc2330af6fb9609a7c3bd5276e127c9ce
      https://github.com/llvm/llvm-project/commit/1939eb3dc2330af6fb9609a7c3bd5276e127c9ce
  Author: Louis Dionne <ldionne.2 at gmail.com>
  Date:   2023-06-06 (Tue, 06 Jun 2023)

  Changed paths:
    M libcxx/CMakeLists.txt
    M libcxx/include/__config
    M libcxx/utils/ci/run-buildbot

  Log Message:
  -----------
  [libc++] Disable int128_t and ship filesystem on MSVC by default

Back in 2020 [1], we went very close to enabling Filesystem on MSVC
by disabling int128_t, but decided to wait because MSVC support
for int128_t was supposed to come shortly after. Since it's not
there yet, I propose turning off int128_t support by default on MSVC.
This will make <filesystem> available by default on MSVC, and most
importantly will open the possibility for changing
LIBCXX_ENABLE_FILESYSTEM to mean "the system doesn't have support
for a filesystem" instead of simply "don't build the std::filesystem
library", which is what I'm really after with this change.

In a way, this is a resurection of D91139.

[1]: https://reviews.llvm.org/D91139#2429595

Differential Revision: https://reviews.llvm.org/D134912