SBCL 0.9.9.37 on wingw, cffi-060219.tar.gz * (asdf:operate 'asdf:load-op :cffi-tests) ... ; C:\CL\lib\cffi\tests\defcfun.fasl written ; compilation finished in 0:00:08 debugger invoked on a SB-ALIEN:UNDEFINED-ALIEN-ERROR: Undefined alien: "llabs" ... * (asdf:operate 'asdf:test-op :cffi-tests) ... CFFI-TESTS::FUNCALL.LONG Test CFFI-TESTS::FUNCALL.LONG-LONG failed Form: (CFFI:FOREIGN-FUNCALL "llabs" :LONG-LONG -9223372036854775807 :LONG-LONG) Expected value: 9223372036854775807 Actual value: #<UNDEFINED-ALIEN-ERROR llabs {B20AC11}>. ... ; ; compilation unit finished ; caught 1 fatal ERROR condition Thanks! -- WBR, Yaroslav Kavenchuk.