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 à 21:22, Nicolai Hess <nicolaihess@web.de> a écrit :
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 donât 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