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

[Tom Lane]

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