How to load an extension in Guile 2.0?

Question

I'm trying to load the Graphviz extension for Guile 2.0. This line of scheme code, suggested by Graphviz's documentation, works in Guile 1.8:

(load-extension "/usr/lib/graphviz/guile/libgv_guile.so" "SWIG_init")

However, it will fail in Guile 2.0 with the following error:

scheme@(guile-user)> (load-extension "/usr/lib/graphviz/guile/libgv_guile.so" "SWIG_init") 
ERROR: In procedure load-extension:
ERROR: In procedure dynamic-link: file: "/usr/lib/graphviz/guile/libgv_guile.so", message: "file not found"

Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.

I've tried using the following alternative paths as well:

/usr/lib/graphviz/guile/libgv_guile
libgv_guile

Same results. How do I do that?

score 2 · Accepted Answer · answered Aug 28 '13 at 16:50

2

The problem was that my distribution's Graphviz packages were compiled against Guile 1.8, and those two versions of Guile are not ABI compatible.

Compiling Graphviz linking against Guile 2.0 (with Guile 2.0's headers) solved it.

answered Aug 28 '13 at 16:50

ivarec

2,542
2
34
57

score 0 · Answer 2 · edited Aug 26 '13 at 12:36

0

(load-extension "/usr/lib/graphviz/guile/libgv_guile.so" "SWIG_init")

It works for me : up to date Archlinux 64 bits, guile 2.09 and graphviz 2.30.1-7

Your error message says "File not found". Check that the file exists and you have enough permissions.

edited Aug 26 '13 at 12:36

Elist

5,313
3
35
73

answered Aug 26 '13 at 12:07

Sil

1

The file exists and it works in Guile 1.8, so it is surely not a problem of this nature – ivarec Aug 26 '13 at 17:25

How to load an extension in Guile 2.0?

2 Answers2