More on the story.

So, the X11 example may not be the best one to have in FFI. It is interesting but complicated.

A basic call, like:

Sample class>>callC: aString

<cdecl: short 'puts' (char*) module: '/lib/libc-2.12.so'>

^self externalCallFailed

works nicely.

Sample callC: 'Hello'.

prints Hello on stdout.

Phil

On Mon, Sep 22, 2014 at 6:10 PM, phil@highoctane.be <phil@highoctane.be> wrote:

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 <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