Re: A micro-optimisation for walkdir() - Mailing list pgsql-hackers

Alvaro Herrera <alvherre@2ndquadrant.com> writes:
> On 2020-Sep-04, Juan José Santamaría Flecha wrote:
>> If will fail to detect that the patch makes the optimisation available for
>> WIN32:
>> 
>> +#if defined(DT_UNKNOWN) && defined(DT_REG) && defined(DT_DIR) &&
>> defined(DT_LNK)

> Oh, I see.  I suggest that it'd be better to change this line instead.

I think that it's standard to test for such symbols by seeing
if they're defined as macros ... not least because that's the *only*
way to test their existence in C.

Personally, what I'd do is lose the enum and just define the macros
with simple integer constant values.

            regards, tom lane