find . -type f -name '*.m4' -print |sed s,^\./,, |sort ) \
|fmt | (tr '\012' @; echo) \
|sed 's/@$$/%/;s/@/ \\@/g' |tr @% '\012\012' \
find . -type f -name '*.m4' -print |sed s,^\./,, |sort ) \
|fmt | (tr '\012' @; echo) \
|sed 's/@$$/%/;s/@/ \\@/g' |tr @% '\012\012' \