[ros-users] Where is the file cholmod.h

Hi all,
I'm building the package visodo. But I get the following error about
missing file cholmod.h.
I can't find the file cholmod.h. Where could I find the file cholmod.h ?
Thanks.
Thuan.

[rosmake-1] >>> visodo >>> [ make ]
[ rosmake ] All 14 lines
{-------------------------------------------------------------------------------
[ 0%] Built target rospack_genmsg_libexe
[ 0%] Built target rosbuild_precompile
[ 2%] Building CXX object
CMakeFiles/test/convert_bundler_undistort.dir/test/convert_bundler_undistort.o
In file included from
/home/thuan/sandbox/slam/rossrc/trunk/wg-ros-pkg/vision/visodo/include/visodo/vo.h:62,
from
/home/thuan/sandbox/slam/rossrc/trunk/wg-ros-pkg/vision/visodo/test/convert_bundler_undistort.cpp:39:
/home/thuan/sandbox/slam/rossrc/trunk/wg-ros-pkg/vision/visodo/include/visodo/csparse.h:50:21:
error: cholmod.h: Aucun fichier ou dossier de ce type
In file included from
/home/thuan/sandbox/slam/rossrc/trunk/wg-ros-pkg/vision/visodo/include/visodo/vo.h:62,
from
/home/thuan/sandbox/slam/rossrc/trunk/wg-ros-pkg/vision/visodo/test/convert_bundler_undistort.cpp:39:
/home/thuan/sandbox/slam/rossrc/trunk/wg-ros-pkg/vision/visodo/include/visodo/csparse.h:102:
error: ‘cholmod_common’ does not name a type
/home/thuan/sandbox/slam/rossrc/trunk/wg-ros-pkg/vision/visodo/include/visodo/csparse.h:103:
error: ISO C++ forbids declaration of ‘cholmod_sparse’ with no type
/home/thuan/sandbox/slam/rossrc/trunk/wg-ros-pkg/vision/visodo/include/visodo/csparse.h:103:
error: expected ‘;’ before ‘*’ token
make[2]: ***
[CMakeFiles/test/convert_bundler_undistort.dir/test/convert_bundler_undistort.o]
Erreur 1
make[1]: *** [CMakeFiles/test/convert_bundler_undistort.dir/all] Erreur 2
-------------------------------------------------------------------------------}