[PATCH] D139450: Warn about unsupported ibmlongdouble

[Tulio Magno Quites Machado Filho via Phabricator via cfe-commits]

tuliom added a comment.

In D139450#3981486 <https://reviews.llvm.org/D139450#3981486>, @qiucf wrote:

> Thanks for the patch! But does libc++ support to be built with `-mabi=ieeelongdouble` now?

@qiucf libc++ can be built with `-mabi=ieeelongdouble`, but it supports only a single long double format, i.e. if it's built with `-mabi=ieeelongdouble`, it won't support IBM double-double and vice versa.
This is already being used in Fedora Rawhide at the moment.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D139450/new/

https://reviews.llvm.org/D139450