• Speedup significantly by not using subshells for data already fetched. Ran against /usr/local/sbin/pkg: Before: 25.12 real 12.41 user 33.14 sys After: 0.53 real 0.49 user 0.13 sys
• Exit with 1 if any missing or unresolved symbol is detected.
• Add option '-U' to skip looking up unresolved symbols.
• Don't consider provided weak objects as unresolved (nm V).

Sponsored by: EMC / Isilon Storage Division