如何使用CholmodSupport在Eigen3 Ubuntu的

Question

我做了這樣一個小例子下：

solver.h

#pragma once 

#include <Eigen/Dense> 
#include <Eigen/Sparse> 
#include <Eigen/CholmodSupport> 

typedef Eigen::SparseMatrix<double> SpMat; 

class UseCholmodSolver 
{ 
    public: 
     UseCholmodSolver() {} 
     ~UseCholmodSolver() {} 
    private: 
     Eigen::CholmodSupernodalLLT<SpMat> cholmod; 
}; 

solver.cpp

#include "solver.h" 

的main.cpp

#include "solver.h" 

int main() 
{ 
    return 0; 
} 

Makefile

CXXFLAGS=-g -O2 -Wall -DNDEBUG -I./ext/eigen -I/usr/include/suitesparse 
CXX=g++ 

all: t1 
clean: 
    rm -f *.o main 

main.o: main.cpp solver.h 
solver.o: solver.cpp solver.h 

t1: main.o 
    $(CXX) main.o -o main -lcholmod 
t2: main.o solver.o 
    $(CXX) main.o solver.o -o main -lcholmod 

當我執行「make t1」時，一切都很好。 然而，當我輸入「make T2」，有重定義錯誤：

g++ main.o solver.o -o main -lcholmod 
solver.o: In function `int Eigen::internal::cm_start<long>(cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:177: multiple definition of `int Eigen::internal::cm_start<long>(cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:177: first defined here 
solver.o: In function `int Eigen::internal::cm_finish<long>(cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:178: multiple definition of `int Eigen::internal::cm_finish<long>(cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:178: first defined here 
solver.o: In function `int Eigen::internal::cm_free_factor<long>(cholmod_factor_struct*&, cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:180: multiple definition of `int Eigen::internal::cm_free_factor<long>(cholmod_factor_struct*&, cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:180: first defined here 
solver.o: In function `int Eigen::internal::cm_free_dense<long>(cholmod_dense_struct*&, cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:181: multiple definition of `int Eigen::internal::cm_free_dense<long>(cholmod_dense_struct*&, cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:181: first defined here 
solver.o: In function `int Eigen::internal::cm_free_sparse<long>(cholmod_sparse_struct*&, cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:182: multiple definition of `int Eigen::internal::cm_free_sparse<long>(cholmod_sparse_struct*&, cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:182: first defined here 
solver.o: In function `cholmod_factor_struct* Eigen::internal::cm_analyze<long>(cholmod_sparse_struct&, cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:184: multiple definition of `cholmod_factor_struct* Eigen::internal::cm_analyze<long>(cholmod_sparse_struct&, cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:184: first defined here 
solver.o: In function `cholmod_dense_struct* Eigen::internal::cm_solve<long>(int, cholmod_factor_struct&, cholmod_dense_struct&, cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:187: multiple definition of `cholmod_dense_struct* Eigen::internal::cm_solve<long>(int, cholmod_factor_struct&, cholmod_dense_struct&, cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:187: first defined here 
solver.o: In function `cholmod_sparse_struct* Eigen::internal::cm_spsolve<long>(int, cholmod_factor_struct&, cholmod_sparse_struct&, cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:190: multiple definition of `cholmod_sparse_struct* Eigen::internal::cm_spsolve<long>(int, cholmod_factor_struct&, cholmod_sparse_struct&, cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:190: first defined here 
solver.o: In function `int Eigen::internal::cm_factorize_p<long>(cholmod_sparse_struct*, double*, long*, unsigned long, cholmod_factor_struct*, cholmod_common_struct&)': 
/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:195: multiple definition of `int Eigen::internal::cm_factorize_p<long>(cholmod_sparse_struct*, double*, long*, unsigned long, cholmod_factor_struct*, cholmod_common_struct&)' 
main.o:/home/xiang/Code/testEigen/./ext/eigen/Eigen/src/CholmodSupport/CholmodSupport.h:195: first defined here 
collect2: error: ld returned 1 exit status 
Makefile:14: recipe for target 't2' failed 
make: *** [t2] Error 1 

看來原因是「長」型專業模板「CholmodSupport.h」功能。任何想法解決這個問題？

Answer 1

有在本徵的devel的分支，我只是在這裏固定CholmodSupport一個問題： https://bitbucket.org/eigen/eigen/commits/5ecddbf9fae7f5a4d4e587b8809d9287306885d3

的問題是，一些輔助功能（用於委託給適當的內部cholmod函數）不標記爲inline，因此在編譯爲不同的編譯單元時有多個定義。

對於Eigen 3.3和Eigen 3.2，您最小的示例應該可以正常工作。