The test for --disable-dependency-tracking depends on a mock autotest
command but I apparently failed to commit that script.
--- /dev/null
+#!/bin/sh
+#
+# Copyright © 2022 Nick Bowler
+#
+# Fake autotest program for testing the autotest snippets.
+#
+# License WTFPL2: Do What The Fuck You Want To Public License, version 2.
+# This is free software: you are free to do what the fuck you want to.
+# There is NO WARRANTY, to the extent permitted by law.
+
+argv0=$0
+
+outfile=
+for arg
+do
+ arg=${lastarg:+"$lastarg="}$arg
+ lastarg=
+
+ save_IFS=$IFS; IFS='='
+ set x $arg; shift; shift; optarg=$*
+ IFS=$save_IFS
+
+ case $arg in
+ -o|--output) lastarg=--output ;;
+ --output=*) outfile=$optarg ;;
+ esac
+done
+
+test x"$outfile" = x || exec 1>"$outfile"