Comment 7 for bug 1395278

Well, that was a bad attempt, but this should get you really close:

for i in $(find . -name '*.cc' -or -name '*.h'); do
  echo $i;
  cat $i | perl -pe 's/\bm_([a-zA-Z0-9_]+)/\1_/g' > $i.tmp;
  mv $i.tmp $i;
done