I passed 'localhost:0:0' in the XWindows example and this gave me a window reference.

The next problem was that it broke after that. But I got the handle.

Try with that, it may help.

Phil

On Mon, Sep 22, 2014 at 10:02 PM, Annick Fron <list@afceurope.com> wrote:

Thanks you

The problem is I wanted to use X windows !

Otherwise I have managed to use FFI on Linux.

Perhaps there is a glitch when passing nil as argument. It is not clear whether we have to use nil or 0 (as a null pointer).

This is really my point, I sometimes need to pass NULL.

Annick

Le 22 sept. 2014 �� 21:22, Nicolai Hess <nicolaihess@web.de> a ��crit :

2014-09-22 18:10 GMT+02:00 phil@highoctane.be <phil@highoctane.be>:

I've been able to reproduce this.

Well, my CentOS thing requires me for some reason to put /usr/lib/libX11.so.6 in the module name (doing these kind of things looks like usual for lib names with FFI from what I saw from old Squeak threads).

Yes, I read this threads too, I solved it by

LD_LIBRARY_PATH=<YOUR_PATH_TO_X11> ./pharo ....

but no matter which of this (LD_LIBRARY_PATH or full name in the ffi pragma) the call throws the

"could not coerce arguments"- error.

But the Sample class>>callC: method you wrote in the other mail works.

XCreateGC: xDisplay with: aDrawable with: valueMask with: values

<cdecl: X11GC 'XCreateGC' (X11Display* X11Drawable ulong long*) module: '/usr/lib/libX11.so.6'>

Now, other internal FFIPrims tests do work.

So, it is X11 or something else, I do not know.

Phil

On Mon, Sep 22, 2014 at 4:39 PM, Ben Coman <btc@openinworld.com> wrote:

Annick Fron wrote:

Hi,

I have posted a bug about this in fogbugz.
FFI example on Linux don���t work

X11Display coloredRectangles
raises an error �� coud not coerce arguments ��.
In fogbugz, I was asked to raise this question in the mailing list, to know if it comes from the VM or from FFI.

Annick

��

Hi Annick,
Sorry I don't know anything about this topic to help, just a minor observation that a link to the fogbugz issue would help streamline things for someone who does.
:)
cheers -ben