[PATCH] D112906: [PowerPC] Emit warning for ieeelongdouble on older GNU toolchain

[Qiu Chaofan via Phabricator via cfe-commits]

qiucf added a comment.

In D112906#3304340 <https://reviews.llvm.org/D112906#3304340>, @jwakely wrote:

>> GCC 12 should have proper support for IEEE-754 compliant 128-bit floating point in libstdc++.
>
> Yes, but it's unconditionally disabled when including the headers with Clang.

Is that because clang lacks something required by this feature? (for example. clang-12 doesn't have `__ibm128` and many builtins) If so, clang-14 should have these fixed.


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  https://reviews.llvm.org/D112906/new/

https://reviews.llvm.org/D112906