HI All ,

I am using Eigen in my project. I am struggling on one issue , I would like to appreciate if anyone can help me on this,

Eigen::SparseLLT<Eigen::SparseMatrix<double,RowMajor>,Eigen::Cholmod> slu;
slu.compute(B);

I am getting linking error when I tried to call "slu.compute()" when I comment this line I can compile and link my code properly ,

Error :

/home/prion/Eigen/eigen/SuiteSparse/CHOLMOD/Lib/libcholmod.a(cholmod_super_numeric.:cholmod_super_numeric.c:(.text+0x1159): undefined reference to `_dpotrf_'
/home/prion/Eigen/eigen/SuiteSparse/CHOLMOD/Lib/libcholmod.a(cholmod_super_numeric.:cholmod_super_numeric.c:(.text+0x12de): undefined reference to `_dpotrf_'
/home/prion/Eigen/eigen/SuiteSparse/CHOLMOD/Lib/libcholmod.a(cholmod_super_numeric.:cholmod_super_numeric.c:(.text+0x203b): undefined reference to `_zpotrf_'
/home/prion/Eigen/eigen/SuiteSparse/CHOLMOD/Lib/libcholmod.a(cholmod_super_numeric.:cholmod_super_numeric.c:(.text+0x2181): undefined reference to `_zpotrf_'
/home/prion/Eigen/eigen/SuiteSparse/CHOLMOD/Lib/libcholmod.a(cholmod_super_numeric.:cholmod_super_numeric.c:(.text+0x2ede): undefined reference to `_zpotrf_'
/home/prion/Eigen/eigen/SuiteSparse/CHOLMOD/Lib/libcholmod.a(cholmod_super_numeric.:cholmod_super_numeric.c:(.text+0x305e): undefined reference to `_zpotrf_'

Command using to compile my code :

prion@bangalore ~/Eigen/eigen/Example
$ g++ -I/home/prion/Eigen/eigen -I/home/prion/Eigen/eigen/SuiteSparse/CHOLMOD/Include -I/home/prion/Eigen/eigen/SuiteSparse/UFconfig -I/home
/prion/Eigen/eigen/SuiteSparse/AMD/Include -I/home/prion/Eigen/eigen/SuiteSparse/CAMD/Include -I/home/prion/Eigen/eigen/SuiteSparse/CCOLAMD/
Include -I/home/prion/Eigen/eigen/SuiteSparse/COLAMD/Include ex1.cpp -L/home/prion/Eigen/eigen/SuiteSparse/CHOLMOD/Lib -lcholmod -L/home/pri
on/Eigen/eigen/SuiteSparse/UFconfig -lufconfig -L/home/prion/Eigen/eigen/SuiteSparse/AMD/Lib -lamd -L/home/prion/Eigen/eigen/SuiteSparse/CAM
D/Lib -lcamd -L/home/prion/Eigen/eigen/SuiteSparse/CCOLAMD/Lib -lccolamd -L/home/prion/Eigen/eigen/SuiteSparse/COLAMD/Lib -lcolamd -L/home/
prion/petsc-3.1-p5/cygwin-c-debug/lib -lf2cblas -L/home/prion/Eigen/eigen/SuiteSparse/metis-4.0 -lmetis -o ex1


Thanks in Advance.


Regards
Abhijit

Moved from Amarok Forum to Eigen Forum.

The CHOLMOD library requires the LAPACK library. The linker complains that it cannot find one of the functions provided in the LAPACK library. So try adding -llapack (or whatever the library is called on your system) to the options.

Hi

Thanks I got the solution.



Regards
Abhijit