[cffi-devel] trouble loading libraries on debian

[hbabcockos1 at mac.com]

Hello,

I'm having trouble loading libraries using CFFI 0.9.0 on debian. Example:

The test script:

(defpackage #:test
  (:use #:common-lisp
	#:cffi))

(in-package #:test)

(defun load-library ()
  (define-foreign-library libc
    (t (:default "libc")))
  (use-foreign-library libc)
  (format t "libc loaded~%"))

(load-library)

Gives:
Unable to load foreign library: libc.so
   [Condition of type LOAD-FOREIGN-LIBRARY-ERROR]

Restarts:
  0: [RETRY] Try loading the foreign library again.
  1: [USE-VALUE] Use another library instead.
  2: [ABORT-REQUEST] Abort handling SLIME request.
  3: [TERMINATE-THREAD] Terminate this thread (#<THREAD "repl-thread" {B1BED31}>)

Backtrace:
  0: (CFFI::HANDLE-LOAD-FOREIGN-LIBRARY-ERROR "libc.so" "Unable to load foreign library: ~A" "libc.so")
  1: (LOAD-FOREIGN-LIBRARY LIBC)
  2: (LOAD-LIBRARY)
  3: (SB-INT:EVAL-IN-LEXENV (LOAD-LIBRARY) #<NULL-LEXENV>)
  4: (SWANK::EVAL-REGION "(load-library)
" T)
  5: ((LAMBDA NIL))
  6: ((SB-PCL::FAST-METHOD SWANK-BACKEND:CALL-WITH-SYNTAX-HOOKS (T)) #<unused argument> #<unused argument> #<CLOSURE (LAMBDA NIL) {B75B0C5}>)
  7: (SWANK::CALL-WITH-BUFFER-SYNTAX #<CLOSURE (LAMBDA NIL) {B75B0C5}>)
  8: (SB-INT:EVAL-IN-LEXENV (SWANK:LISTENER-EVAL "(load-library)
") #<NULL-LEXENV>)
  9: ((LAMBDA NIL))
 10: ((SB-PCL::FAST-METHOD SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK (T T)) #<unused argument> #<unused argument> #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<CLOSURE (LAMBDA NIL) {B75AA35}>)
 11: ((LAMBDA NIL))
 12: ((SB-PCL::FAST-METHOD SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK (T T)) #<unused argument> #<unused argument> #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<FUNCTION (LAMBDA NIL) {A9F13C5}>)
 13: (SWANK::CALL-WITH-REDIRECTED-IO #<SWANK::CONNECTION {B01AC89}> #<CLOSURE (LAMBDA NIL) {B75A8E5}>)
 14: (SWANK::CALL-WITH-CONNECTION #<SWANK::CONNECTION {B01AC89}> #<FUNCTION (LAMBDA NIL) {A9F13C5}>)
 15: (SWANK::HANDLE-REQUEST #<SWANK::CONNECTION {B01AC89}>)
 16: ((LAMBDA NIL))
 17: ((LAMBDA NIL))
 18: ((SB-PCL::FAST-METHOD SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK (T T)) #<unused argument> #<unused argument> #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<CLOSURE (LAMBDA NIL) {B1DA0B5}>)
 19: (SWANK::CALL-WITH-REDIRECTED-IO #<SWANK::CONNECTION {B01AC89}> #<CLOSURE (LAMBDA NIL) {B1DA0C5}>)
 20: (SWANK::CALL-WITH-CONNECTION #<SWANK::CONNECTION {B01AC89}> #<CLOSURE (LAMBDA NIL) {B1DA0B5}>)
 21: (SWANK::CALL-WITH-BINDINGS NIL #<CLOSURE (LAMBDA NIL) {B1DA095}>)
 22: ((LAMBDA NIL))
 23: ("foreign function: call_into_lisp")
 24: ("foreign function: funcall0")
 25: ("foreign function: new_thread_trampoline")
 26: ("foreign function: #xB7FCECED")


It is hard to imagine that it can't find the library so I'd guess it is some problem with the loader? dlopen?
I'm using SBCL 0.9.11 & debian 2.6.15-1-686 #2 Mon Mar 6 15:27:08 UTC 2006 i686 GNU/Linux

Suggestions?

Thanks,
-Hazen