XZ Utils  5.2.4
Todo List
Global io_copy_attrs (const file_pair *pair)
ACL and EA support
File sha256.c
Crypto++ has x86 ASM optimizations. They use SSE so if they are imported to liblzma, SSE instructions need to be used conditionally to keep the code working on older boxes.
File tuklib_integer.h
PowerPC and possibly some other architectures support byte swapping load and store instructions. This file doesn't take advantage of those instructions.