1 We need m4 implementation with -P support.
3 --- Filter-1.64/lib/Filter/m4.pm.orig
4 +++ Filter-1.64/lib/Filter/m4.pm
10 + ($m4) = '/usr/gnu/bin/m4';
17 Filter::Util::Exec::filter_add ($self, 'sh', '-c',
18 - "m4 $m4arg 2>/dev/null");
19 + "/usr/gnu/bin/m4 $m4arg 2>/dev/null");