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).
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 <b...@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 > > > >