. ./defs || exit 1
cat >>configure.ac <<'EOF'
-AM_SILENT_RULES
AC_CONFIG_FILES([sub/Makefile])
AC_OUTPUT
EOF
mkdir sub
cat > sub/Makefile.am <<'EOF'
+AUTOMAKE_OPTIONS = -Wno-portability-recursive
my_verbose = $(my_verbose_$(V))
my_verbose_ = $(my_verbose_$(AM_DEFAULT_VERBOSITY))
my_verbose_0 = @echo " XGEN $@";