The default shell is zsh. Here are the timestamps to the nanosecond for the two files:
% stat -f %Fm configure configure.1 1735604012.974301525 1735604012.850264895 — Sean > On Dec 31, 2024, at 5:43 AM, Paul Eggert <egg...@cs.ucla.edu> wrote: > > On 12/31/24 03:38, Paul Eggert wrote: >> Also the echo output was zero (0) > > Oh, but the log in your first message said "test configure -nt configure.1" > had exit status 1. > > Possibly you're using a different shell than Autoconf uses to run its test > script, and your shell supports test -nt whereas the shell Autoconf uses does > not. > > What shell are you using? > > What shell is Autoconf using? Look at the first line of tests/testsuite. If > you start up that shell, and run the same 'test -nt' command, what is its > exit status?