source: src/router/busybox/scripts/find_stray_common_vars

#!/bin/sh

# Common variables are elusive, they don't show up in size output!
# This script will show all commons in *.o, sorted by size

find ! -path './scripts/*' -a ! -name built-in.o -a -name '*.o' \
| while read name; do
    b=`basename "$name"`
    nm "$name" | sed "s/^/$b: /"
done | grep -i ' c ' | sort -k2