Re: pg_preadv() and pg_pwritev()

On 13.01.2021 12:56, Thomas Munro wrote:
> On Wed, Jan 13, 2021 at 10:40 PM Sergey Shinderuk
> <s(dot)shinderuk(at)postgrespro(dot)ru> wrote:
>> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk/usr/include/sys/uio.h:104:9:
>> note: 'pwritev' has been marked as being introduced in macOS 11.0 here,
>> but the deployment target is macOS
>> 10.15.0
>> ssize_t pwritev(int, const struct iovec *, int, off_t)
>> __DARWIN_NOCANCEL(pwritev) __API_AVAILABLE(macos(11.0), ios(14.0),
>> watchos(7.0), tvos(14.0));
>> ^
>
> Hrm... So why did "configure" think you have pwritev, then? It seems
> like you must have been using different compilers or options at
> configure time and compile time, no?
>

No, i've just rerun configure from clean checkout without any options.
It does think that pwritev is available. I'll try to figure this out
later and come back to you. Thanks.