Makefile.am.in
## Process this file with automake to produce Makefile.in -*-Makefile-*-
##m4-files-begin
##m4-files-end
Makefile.am: Makefile.am.in
rm -f $@ $@t
sed -n '1,/^##m4-files-begin/p' $< > $@t
( (echo EXTRA_DIST = README Makefile.am.in | tr '\012' @); \
(echo *.m4|tr ' ' @) ) \
|sed 's/@$$/%/;s/@/ \\@/g' |tr @% '\012\012' \
>> $@t
sed -n '/^##m4-files-end/,$$p' $< >> $@t
chmod a-w $@t
mv $@t $@