[PATCH] libstdc++-v3: check for openat

[Alexandre Oliva]

On Jun 23, 2022, Jonathan Wakely <jwakely@redhat.com> wrote:

> On Thu, 23 Jun 2022 at 12:08, Alexandre Oliva <oliva@adacore.com> wrote:
>> 
>> On Jun 22, 2022, Jonathan Wakely <jwakely@redhat.com> wrote:
>> 
>> > There are other interactions between AT_CDCWD and ::openat not covered
>> > by this patch. I this this also needs to check HAVE_OPENAT:
>> 
>> Here's an updated version, tested with this additional change.

> Did this improve your test results for directory iterators?

'fraid the bad results I posted earlier today had this patch in.  I
can't tell whether it improved anything because I didn't save earlier
results to compare.

> In the unlikely even that the target has ::unlinkat but not ::openat

c++config.h on the target says:

/* #undef _GLIBCXX_HAVE_UNLINKAT */

Thanks for the concern,

-- 
Alexandre Oliva, happy hacker                https://FSFLA.org/blogs/lxo/
   Free Software Activist                       GNU Toolchain Engineer
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