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Re: [sr #110740] AC_PROG_MKDIR_P has incorrect result on NetBSD

From: Tom Lane
Subject: Re: [sr #110740] AC_PROG_MKDIR_P has incorrect result on NetBSD
Date: Tue, 11 Oct 2022 13:04:01 -0400

Zack Weinberg <INVALID.NOREPLY@gnu.org> writes:
> Follow-up Comment #1, sr #110740 (project autoconf):
> Version checks are always fragile, but writing a functional probe for
> properties related to race conditions can be extremely difficult.  Do you have
> any ideas for how we should go about it?

I think autoconf is being overambitious by promising to detect
race-free-ness.  You can't really.

Having said that, it appears to me that POSIX has required
race-free-ness since the nineties, so do you really need to?
Just check that the -p option is accepted, and call it good.

                        regards, tom lane

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