Re: [Pharo-dev] LibFFI/NB Cairo External Module Not Found debugging

On Sat, May 19, 2018 at 1:37 PM, Peter Uhnák <[hidden email]> wrote:

Hi,

some Windows users are repeatedly running into Pharo failing to load Cairo library on Windows (see stack screenshot at the bottom).

The problem is that I have no idea how to even start debugging this.

Is there some documentation on how Pharo loads libraries via FFI on Windows that I can start digging into?

Note that the library is definitely present, as this happens only occasionally -- it can be fixed by restarting PC. But I cannot reasonably ask users to restart just because Pharo decided it doesn't feel like loading a library.

Any pointers / docs / ideas appreciated.

You can see the actual code from 

https://github.com/OpenSmalltalk/opensmalltalk-vm/search?utf8=%E2%9C%93&q=findAndLoadModule%28char+*pluginName%2C+sqInt+ffiLoad%29&type=

?

 

Thanks,

Peter

--

Guille Polito Research Engineer Centre de Recherche en Informatique, Signal et Automatique de Lille CRIStAL - UMR 9189 French National Center for Scientific Research - http://www.cnrs.fr Web: http://guillep.github.io Phone: +33 06 52 70 66 13

If you are running a 32 bit Pharo on a 64 bit Ubuntu, there is instructions for additional steps needed at https://pharo.org/gnu-linux-installation under the ‘Prepare 64-bit-Linux for 32bit Pharo’ heading

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On May 21, 2018, at 00:18, Richard O'Keefe <[hidden email]> wrote:

It's not just Windows users.  I have Pharo 6.0 #605.40

running under Linux Ubuntu version 17.10 and the cairo

library is definitely installed.

Just starting Pharo is a little concerning:

ok@Herbrand:~/Smalltalk$ pharo
ioLoadModule(/home/ok/Pharo.d/pharo-vm/lib/pharo/5.0-201707201942/FT2Plugin.so):
  libfreetype.so.6: cannot open shared object file: No such file or directory
ioLoadModule(/home/ok/Pharo.d/pharo-vm/lib/pharo/5.0-201707201942/FT2Plugin.so):
  libfreetype.so.6: cannot open shared object file: No such file or directory

Yet these files exist.

/usr/lib/x86_64-linux-gnu/libfreetype.a
/usr/lib/x86_64-linux-gnu/libfreetype.so
/usr/lib/x86_64-linux-gnu/libfreetype.la
/usr/lib/x86_64-linux-gnu/libfreetype.so.6
/usr/lib/x86_64-linux-gnu/libfreetype.so.6.14.0

When I try any Roassal examples, I get

Error: cannot locate cairo library. Please check if it is installed ...

CairoLibrary(Object) error:

CairoLibrary unix32ModuleName

Unix32Platform ffiModuleName

CairoLibrayr(FFILibrary) moduleName

FFICalloutMethodBuilder moduleName

The 32 is the clue.  Apparently I'm running a 32-bit Pharo

with 64-bit libraries installed.  Could this be the problem

on Windows?

On 21 May 2018 at 07:46, Guillermo Polito <[hidden email]> wrote:

On Sat, May 19, 2018 at 1:37 PM, Peter Uhnák <[hidden email]> wrote:

Hi,

some Windows users are repeatedly running into Pharo failing to load Cairo library on Windows (see stack screenshot at the bottom).

The problem is that I have no idea how to even start debugging this.

Is there some documentation on how Pharo loads libraries via FFI on Windows that I can start digging into?

Note that the library is definitely present, as this happens only occasionally -- it can be fixed by restarting PC. But I cannot reasonably ask users to restart just because Pharo decided it doesn't feel like loading a library.

Any pointers / docs / ideas appreciated.

You can see the actual code from 

https://github.com/OpenSmalltalk/opensmalltalk-vm/search?utf8=%E2%9C%93&q=findAndLoadModule%28char+*pluginName%2C+sqInt+ffiLoad%29&type=

?

 

Thanks,

Peter

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--

Guille Polito Research Engineer Centre de Recherche en Informatique, Signal et Automatique de Lille CRIStAL - UMR 9189 French National Center for Scientific Research - http://www.cnrs.fr Web: http://guillep.github.io Phone: +33 06 52 70 66 13