Re: [Chicken-users] lazy-ffi: what am I missing?

[Mario Domenech Goulart]

Hi Jeronimo

On Wed, 31 Mar 2010 15:17:25 -0300 Jeronimo Pellegrini <address@hidden> wrote:

> On Wed, Mar 31, 2010 at 01:51:42PM -0400, Mario Domenech Goulart wrote:
>> On Tue, 30 Mar 2010 23:06:29 -0300 Jeronimo Pellegrini <address@hidden> 
>> wrote:
>> 
>> > $ csc -X lazy-ffi.scm thing.scm
>> >
>> > (Do I really need to include the lazy-ffi source when compiling?)
>> 
>> According to the wiki docs, yes:
>> 
>>     To use this extension in compiled code, invoke the compiler with
>>     -extension lazy-ffi. This is necessary because the extension defines
>>     a special read-syntax which has to be registered before the source
>>     code is read in. This is not required for interpreted code.
>
> Ok, I understand. But does it need to load the *source* of the
> extension? I thought csc would be able to load the extension
> (the shared library) before compiling.
> (It would be more convenient than having to give the full path of the
> egg when compiling)
>
>
> BTW, you mentioned a "-extension" flag; I suppose you meant "-extend"?
>
> -X -extend FILENAME            load file before compilation commences

I think so.  I'm not completely sure, but here's what I think:

  * the documentation for lazy-ffi has been copied from the release/3
    branch (eggs repository) and some information regarding to the
    chicken tools became outdated.

  * csc for chicken 3 has a -extension command line option (and -extend
    too).  It seems that csc for chicken 4 doesn't have -extension, but
    it has -extend.

  * as far as I understand the argument to -extend may be the name of an
    extension, since it calls 

      (load (##sys#resolve-include-filename thing #f #t))

    behind the scenes.  Here on my system I get:

     (##sys#resolve-include-filename "lazy-ffi" #f #t)
     "/usr/local/chicken-4.4.4/lib/chicken/5/lazy-ffi.so"

So, I think the correct command line option is really -extend.  Since
I'm not completely sure, I'll let Felix decide how to fix it.

Best wishes.
Mario