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

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

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 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 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

Sometimes the problem is that you have Linux x86_64 and only the 64bit libraries. When using squeak it is necessary to have the proper 32bit libraries to have the system working. On 22-09-2014 18:10, phil@highoctane.be wrote:

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

...

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

Thank you your examples work for me as well, and it’s pretty fast drawing ! Annick Le 23 sept. 2014 à 01:04, phil@highoctane.be a écrit :

I've got the 32 bit ones. I checked.

Nicolas got it working, I'll check.

Phil

On Tue, Sep 23, 2014 at 12:32 AM, Casimiro de Almeida Barreto <casimiro.barreto@gmail.com> wrote: Sometimes the problem is that you have Linux x86_64 and only the 64bit libraries. When using squeak it is necessary to have the proper 32bit libraries to have the system working.

On 22-09-2014 18:10, phil@highoctane.be wrote:

...

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 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 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