(info "(texinfo) @pagesizes") says:
To make more elaborate changes, such as changing any of the page
margins, you must define a new command in 'texinfo.tex' or
'texinfo.cnf'.
Mention a workaround:
Mention a workaround for what exactly? If you need to do extensive
changes to how Texinfo works you need to modify texinfo.tex or
texinfo.cnf, its that simple.
Before:
$ perl -wle 'for(1..2){print "ABC " x 33, "\n";}'|makeinfo --plaintext
ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC
ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC
ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC
ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC
After:
$ perl -wle 'for(1..2){print "ABC " x 33, "\n";}'|makeinfo --plaintext
--fill-column=69|sed 's/^/ /'
ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC
ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC
ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC
ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC ABC
