Re: [Caml-list] Static linking via Ctypes?

[Dan Benjamin <dbenjamin@janestreet.com>]

I am passing -force_load, as well as --whole-archive (in case that
makes a difference), and I have the following situation:

- readelf -s shows that the function that I wish to call exists in the
executable
- running the executable results in Dl.DL_error("undefined symbol")
for the same function, corresponding to the line of code where I call
Foreign.foreign.

Am I going about this wrongly?

On Tue, Mar 25, 2014 at 11:04 AM, Bruno Deferrari <utizoc@gmail.com> wrote:
> On Tue, Mar 25, 2014 at 11:54 AM,  <dbenjamin@janestreet.com> wrote:
>> I'm using Ctypes to interface with a dynamic library, but in addition to the
>> interface provided the library I have some helper functions (written in C,
>> against the same library) that I'd also like to call via Ctypes.  Is there any
>> way to achieve this via static linking or am I required to build another
>> shared object?
>>
>
> Static linking works. I was in this same situation yesterday, and
> adding the .o files that were generated from C sources to the linking
> step did the trick.
>
> If you are trying to link a .a file, you may have to pass the
> -force_load option to the linker to force it to include it, otherwise
> it may see that none of the symbols there are being referenced
> directly and decide to not include it (this happened to me when using
> clang in OSX).
>
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>
>
> --
> BD