diff -ruN old new > patch


diff -u pp.c~             pp.c             >  patch
diff -u t/op/pack.t~ t/op/pack.t           >> patch
diff -u pod/perlfunc.pod~ pod/perlfunc.pod >> patch

# to apply run 
#  patch -p1 -N <  patch
[download]

If running diff -ruN olddir newwdir > patch, its probably wise to make clean (or make realclean) first (results in smaller patches :D).

http://perldoc.perl.org/perlhack.html#Submitting-patches http://perldoc.perl.org/perlhack.html#Patching