[common-lisp][realpath]

CL-USER> (ql:quickload "iolib")
To load "iolib":
  Load 1 ASDF system:
    iolib
; Loading "iolib"

("iolib")
CL-USER> (describe 'iolib.syscalls:realpath)
IOLIB.SYSCALLS:REALPATH
  [symbol]

REALPATH names a compiled function:
  Lambda-list: (PATH)
  Derived type: (FUNCTION (T) (VALUES T &OPTIONAL))
  Documentation:
    Read the file name pointed by the symbolic link PATH.
  Inline proclamation: INLINE (inline expansion available)
  Source file: /home/zena/quicklisp/dists/quicklisp/software/iolib-0.7.3/src/syscalls/ffi-functions-unix.lisp
; No value
CL-USER> (iolib.syscalls:realpath "/usr/bin/gcc")
"/usr/bin/gcc-4.5"