M4 problem with escaping macro arguments

[Chris Leishman]

Hi all,

According to the info page:

 If you want a macro to expand to something like `$12', put a pair of
 quotes after the `$'.  This will prevent `m4' from interpreting the `$'
 sign as a reference to an argument.

However, with gnu m4 version 1.4, the following results are observed:

$ m4 --version
GNU m4 1.4
$ echo "define(y, \$1-\$\`'2)y(5,6)"
define(y, $1-$`'2)y(5,6)
$ echo "define(y, \$1-\$\`'2)y(5,6)" | m4
5-6
$

Expected output was "5-$2".


Thanks,

Chris