Follow-up Comment #13, sr #110397 (project autoconf):
Your new test works:
$ cat conftest.ac
AC_INIT([test], [1])
AC_USG
AC_OUTPUT
$ autoconf -o /dev/null conftest.ac
conftest.ac:2: warning: The macro `AC_USG' is obsolete.
conftest.ac:2: You should run autoupdate.
./lib/autoconf/headers.m4:837: AC_USG is expanded from...
conftest.ac:2: the top level
$ autoconf --version
autoconf (GNU Autoconf) 2.70
For your next command, the --gnu option lead to: unrecognized option `--gnu'
If I remove the --gnu option, and change $PREFIX/share/autoconf/autoconf.m4f
(does not exist) to $PREFIX/share/autoconf/autoconf/autoconf.m4f, and same for
trailer.m4, I get:
$ m4 --nesting-limit=1024 --include=/tmp/share/autoconf --debug=aflq
--fatal-warning --trace=_m4_warn
--reload-state=/tmp/share/autoconf/autoconf/autoconf.m4f
/tmp/share/autoconf/autoconf/trailer.m4 conftest.ac > /dev/null
m4trace:conftest.ac:2: -1- _m4_warn([obsolete], [The macro `AC_USG' is
obsolete.
You should run autoupdate.], [./lib/autoconf/headers.m4:837: AC_USG is
expanded from...
conftest.ac:2: the top level])
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