Hi sorry for the noise… I have gotten confused (among other things) about the status of CFFI’s mailing lists. In any case, I have the following problem. This is in my "test" file: (cffi:define-foreign-library cl-autowrap-tests-lib (t "cl-autowrap-test.a")) This is what I get on LWM. CL-USER 15 > (cffi:load-foreign-library 'cl-autowrap-tests::cl-autowrap-tests-lib) Error: Unable to load foreign library (CL-AUTOWRAP-TESTS-LIB). Could not register handle for external module CL-AUTOWRAP-TESTS::CL-AUTOWRAP-TESTS-LIB: no suitable image found. Did find: /Users/marcoxa/Projects/Lang/CL/tests/cl-autowrap/cl-autowrap-test.a: file too short. 1 (continue) Try loading the foreign library again. 2 Use another library instead. 3 (abort) Return to level 0. 4 Return to top loop level 0. Type :b for backtrace or :c <option number> to proceed. Type :bug-form "<subject>" for a bug report template or :? for other options. It obviously appears that something may be amiss with the .a (static) generation. My C/C++ fu us very rusty. Any ideas? Cheers -- MA -- Marco Antoniotti