Re: [Caml-list] Mixed static/dynamic linking of libraries

[Gerd Stolpmann <info@gerd-stolpmann.de>]

Am Montag, den 02.05.2011, 13:00 +0100 schrieb Richard W.M. Jones:
> On Mon, May 02, 2011 at 04:49:03PM +1000, Paul Steckler wrote:
> > I want to statically link a library (libsqlite3.a) with my OCaml
> > application, but allow other
> > libraries to link dynamically. I'm building using ocamlfind on Linux.
> > I've tried various combinations
> > of -cclib -static and -cclib -Bdynamic, to no avail.  If I use the arguments
> > 
> >   -cclib -static -cclib -lsqlite3
> > 
> > the linker appears to find libsqlite3.a, but the linker then tries to
> > statically link every other library
> > used by my application.  That's so even if I follow the above by
> > -cclib -Bdynamic.
> > 
> > Is there a way to mix static and dynamic libraries using ocamlfind?
> 
> Have you tried naming the library explicitly, eg:
> 
>   -cclib /usr/lib/libsqlite3.a

You could also try

	-cclib -l:libsqlite3.a

According to ld docs, the colon prevents the automatic name translation
that results in preferring libsqlite3.so.

However, I don't think this will be successful. The
ocamlfind/ocamlopt/gcc/ld chain will generate a normal -lsqlite3
nevertheless, and so far I've tried it, this takes precedence. What you
can try is to copy libsqlite3.a to a private directory p, and use -ccopt
-Lp to add it to the library search path.

Also note that static linking is more sensitive to the order of the
linked libraries. As more or less everybody is using dynamic linking,
these problem often remain unnoticed.

Gerd


> Rich.
> 
> -- 
> Richard Jones
> Red Hat
>