Is this C++? If so, one needs a language="c++" in the Extension line.
At this point I might see if you can write a simple C program that
can call your cdd library which will expose wether or not the issue
is with Cython/distutils or the cdd library you're using.
- Robert
On Jan 23, 2009, at 5:07 AM, Sebastien Barthelemy wrote:
>>> The example is attached as a patch against sage 3.2.3.
>
> I forgot it, sorry.
>
>>> As burcin pointed on IRC, this might have something to do with the
>>> fact that dd_set_global_constant is mangled:
>>> nm local/lib/libcdd.a | grep dd_set_global_constants
>>> 00000185 T _Z23dd_set_global_constantsv
>>
>> What's the line in module_list.py that you use for pymcdd?
>
> Extension('sage.geometry.pymcdd',
> sources = ['sage/geometry/pymcdd.pyx'],
> libraries=['cdd']),
>
> It is also in the patch.
>
>> Does it even explicitly link in cdd??
>
> yes
>
>> Does it use the right language option?
>
> I don't know. My only documentation on this topic is
> http://docs.cython.org/docs/source_files_and_compilation.html
>
> --
> Sébastien Barthélemy
>
> >
> # HG changeset patch
> # User Sébastien Barthélemy <sebastien.barthel...@gmail.com>
> # Date 1232711765 -3600
> # Node ID 6013a813c4af012b70e08b1cd32d0c8d42444ffc
> # Parent b0aa7ef45b3ccf27b3a5196a543451335419c4c2
> minimalistic example showing runtime linking problems with libcdd
>
> diff -r b0aa7ef45b3c -r 6013a813c4af module_list.py
> --- a/module_list.py Mon Jan 05 23:03:45 2009 -0800
> +++ b/module_list.py Fri Jan 23 12:56:05 2009 +0100
> @@ -179,6 +179,16 @@
> Extension('sage.finance.time_series',
> sources = ['sage/finance/time_series.pyx'],
> include_dirs = numpy_include_dirs),
> +
> + ################################
> + ##
> + ## sage.geometry
> + ##
> + ################################
> +
> + Extension('sage.geometry.pymcdd',
> + sources = ['sage/geometry/pymcdd.pyx'],
> + libraries=['cdd']),
>
>
> ################################
> diff -r b0aa7ef45b3c -r 6013a813c4af sage/geometry/all.py
> --- a/sage/geometry/all.py Mon Jan 05 23:03:45 2009 -0800
> +++ b/sage/geometry/all.py Fri Jan 23 12:56:05 2009 +0100
> @@ -1,3 +1,6 @@
> +
> +import pymcdd
> +
> from polytope import polymake
>
> from polyhedra import extreme_verts, ieq_to_vert, vert_to_ieq,
> Polyhedron, mink_sum, polytopes
> diff -r b0aa7ef45b3c -r 6013a813c4af sage/geometry/mcdd.pxd
> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
> +++ b/sage/geometry/mcdd.pxd Fri Jan 23 12:56:05 2009 +0100
> @@ -0,0 +1,5 @@
> +cdef extern from "setoper.h":
> + ctypedef unsigned long *set_type
> +
> +cdef extern from "cdd.h":
> + void dd_set_global_constants()
> diff -r b0aa7ef45b3c -r 6013a813c4af sage/geometry/pymcdd.pyx
> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
> +++ b/sage/geometry/pymcdd.pyx Fri Jan 23 12:56:05 2009 +0100
> @@ -0,0 +1,4 @@
> +cimport mcdd
> +
> +# init global constants
> +mcdd.dd_set_global_constants()
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