[llvm-dev] A libc in LLVM

[Finkel, Hal J. via llvm-dev]

On 7/15/19 1:22 PM, Aaron Ballman via llvm-dev wrote:
> On Mon, Jul 15, 2019 at 1:02 PM Siva Chandra <sivachandra at google.com> wrote:
>> On Fri, Jul 12, 2019 at 8:32 AM Aaron Ballman <aaron at aaronballman.com> wrote:
>>>> llvm-libc is an implementation of the C standard library targeting C11
>>>> and above.
>>> Any particular reason for C11 as opposed to C17?
>> Two reasons:
>> 1. The C++17 standard refers to the C11 standard.
> This is somewhat confusing to me. That's a reason to support *at
> least* C11. It doesn't seem like a reason to not support the latest C
> standard.
>
>> 2. C11 is sufficiently modern while not closing doors for users
>> requiring compliance with an "older" standards. That said, we could
>> choose not to implement certain items removed in the C17 standard. An
>> obvious example of such a candidate is `gets`.
> gets() was removed in C11. ;-)
>
> I strongly think we should support the C17 standard library. C17 was a
> bugfix release, so the delta between it and C11 in terms of
> functionality is small but the quality is higher.


+1. Aiming for C17 seems better than aiming for only C11.

  -Hal


>
> ~Aaron
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-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory