[GNU Autoconf 2.71] testsuite: 10 11 12 14 37 92 236 238 239 240 293 299 397 430 431 432 433 434 435 436 437 438 439 440 509 514 failed

I got fairly depressing results from the autoconf test suite on
macOS 12.4 (Monterey), running on an M1 MacBook Pro.
Process was just

./configure --prefix=/usr/local/autoconf-2.71
make
make check

This machine has current XCode and command line tools installed.
I do also have some MacPorts packages installed, but reducing my
PATH to just "/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin"
didn't change the results.

			regards, tom lane