[sr #110740] AC_PROG_MKDIR_P has incorrect result on NetBSD

Update of sr #110740 (project autoconf):

                Priority:                 3 - Low => 5 - Normal             
                Severity:               2 - Minor => 3 - Normal             
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #6:

Thanks for mentioning the postgresql situation. I went back and looked back at
autoconf, and it seems to me that all things considered,nowadays the cure of
using a relative install-sh path is worse than the disease of ancient mkdirs
that don't work properly. If so, it's better now for AC_PROG_MKDIR_P to fall
back on plain mkdir -p than on a relative path to install-sh, so I installed a
patch to do that
<https://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=d081ac3ec80d551c3fdd3d74ade368acce3fc4a8>.
Only the last four lines of that patch affect functionality; everything else
is documentation.

Assuming postgresql wants to work with current Autoconf, it can put in
something like "case $MKDIR_P in /*) ;; */*) MKDIR_P='mkdir -p';; esac" into
the appropriate place in configure.ac. This should work around the problem
now, and should be a no-op in later Autoconf versions.


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