-# Automake fragment to hook up a basic Autotest test suite into the build.
-# It is expected that a testsuite.at file exists in $(srcdir). The
-# testsuite will be output to $(builddir)/testsuite.
+# Automake fragment to hook up a basic Autotest test suite into the
+# build. It is expected that a testsuite.at file exists in $(srcdir).
+# The testsuite will be output to $(builddir)/testsuite.
+#
+# The DX_AUTOMAKE_COMPAT macro must be expanded by configure.ac to
+# provide necessary substitutions. If DX_PROG_AUTOTEST is used, this
+# will be included automatically.