[Caml-list] -custom and C libraries

[Caml-list] -custom and C libraries

[Ohad Rodeh]

List,
   I have just spent several hours trying to convince ocamlc (and ocamlopt)
to
link together several cmo files and C libraries and objects. It turned out
that
I could only link them together if all the C files were compiled into
objects, and not
linked together into intermediate libraries.

For example, I could not do :
    ocamlc -custom -o test_prog   libX.a libY.a intf.o X.cmo Y.cmo

But if I opened libX.a and libY.a into their component object files, things
worked
great.

Has anybody had the same problems, or am I overlooking the obvious?

      Ohad.

-----------------------------------------------------------------------------------

Ohad Rodeh
tel: +972-3-6401641
IBM Haifa, storage research

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Re: [Caml-list] -custom and C libraries

[Wolfgang Lux]

Ohad Rodeh wrote

> For example, I could not do :
>     ocamlc -custom -o test_prog   libX.a libY.a intf.o X.cmo Y.cmo
>
> But if I opened libX.a and libY.a into their component object files, 
> things
> worked
> great.
>
> Has anybody had the same problems, or am I overlooking the obvious?

Yes :-) For most platforms[1] the order of files on the command line is 
relevant.
Archive members are included in the link only if they can be used to
resolve open references for those files which preceed them on the command
line. In your example, there are no objects specified before the archives
and they aren't used for that reason. The following command should do
the job.

   ocamlc -custom -o test_prog intf.o X.cmo Y.cmo  libX.a libY.a

Wolfgang

[1] IBM's AIX linker is one of the notable exceptions, AFAIR.

--
Wolfgang Lux                              Phone: +49-251-83-38263
Institut fuer Wirtschaftinformatik          FAX: +49-251-83-38259
Universitaet Muenster                 Email: wlux@uni-muenster.de

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