On Sun, Jun 26, 2011 at 8:49 PM, Eric Schulte <schulte.eric@gmail.com> wrote:

- What are the contents of main.c in your example above?  I assume it is
 hand written and not generated by ecl?

- Were you required to write a libfoo.h file to include in main.c or is
 that not necessary?

Sorry, I did not copy-paste the content of the C file. Here it goes:

$ ecl -norc
ECL (Embeddable Common-Lisp) 11.1.1
Copyright (C) 1984 Taiichi Yuasa and Masami Hagiya
Copyright (C) 1993 Giuseppe Attardi
Copyright (C) 2000 Juan J. Garcia-Ripoll
ECL is free software, and you are welcome to redistribute it
under certain conditions; see file 'Copyright' for details.
Type :h for Help. 
Top level.
> (require :cmp)

;;; Loading #P"/Users/jjgarcia/lib/ecl-11.1.1/cmp.fas"

> (setf c::*compile-in-constants* t)

> (c:build-shared-library "foo" :lisp-files (list (compile-file "foo" :system-p t :verbose nil)))
;;; [...]
;;; Note:
;;;   Library initialization function is main_dll_FOO
;;; [...]
> (ext:system "gcc -o main.exe main.c -L$HOME/lib -L./ -lfoo -lecl")

> (ext:system "./main.exe")

> (ext:system "cat ./foo.lsp")
(defun foo (x)
 (print x))

(foo 'hola)

> (ext:system "cat ./main.c")
extern int main_dll_FOO(int argc, char **argv);

int main(int argc, char **argv)
  main_dll_FOO(argc, argv);


Notice that the name of the function was announced by ECL in a comment after C:BUILD-SHARED-LIBRARY. The declaration does not need to live in a *.h file, it may be in the same compiled file.


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