Merged WANG Cong patch, makefile add debug target.
treefca7c446d51b470288a90b7a4d07f72c35b41add
-rw-r--r-- 15122 COPYING
-rw-r--r-- 0 ChangeLog
-rw-r--r-- 2511 Makefile
drwxr-xr-x - backends
drwxr-xr-x - docs
drwxr-xr-x - include
drwxr-xr-x - src
drwxr-xr-x - tools