大佬教程收集整理的这篇文章主要介绍了Ubuntu16.04下编译ORB_SLAM2错误，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
到Ubuntu16.04下编译ORB_SLAM2报错，提示：
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:745:3:error: static assertion Failed:YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY
EIGEN_checK_BINARY_COMPATIBILIY(Func,typename ActualDstTypeCleaned::Scalar,typename Src::Scalar);
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h: In instantiation of ‘void Eigen::internal::c
all_assignment_no_alias(Dst&,const Src&,const Func&) [with Dst = Eigen::Matrix<int,-1,1>; Src = Eigen::Matrix<long int,1,1>; Func = Eigen::internal::assign_op<int>]’:
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:712:27:
required from ‘void Eigen::internal::c
all_assignment(Dst&,const Func&,typ
ename Eigen::internal::enable_if<(! Eigen::internal::evaluator_assume_aliasing<Src>::
value),
void*>::typ
E) [with Dst = Eigen::Matrix<int,1>; Func = Eigen::internal::assign_op<int>; typ
ename Eigen::internal::enable_if<(! Eigen::internal::evaluator_assume_aliasing<Src>::
value),
void*>::type =
void*]’
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:693
:18:
required from ‘void Eigen::internal::c
all_assignment(Dst&,const Src&) [with Dst = Eigen::Matrix<int,1>]’
/usr/include/eigen3/Eigen/src/Core/PlainOb
jectBase.h:682:32:
required from ‘Derived& Eigen::PlainOb
jectBase<Derived>::_set(const Eigen::DenseBase<OtherDerived>&) [with OtherDerived = Eigen::Matrix<long int,1>; Derived = Eigen::Matrix<int,1>]’
/usr/include/eigen3/Eigen/src/Core/Matrix.h:225:24:
required from ‘Eigen::Matrix<_Scalar,_Rows,_Cols,_Options,_MaxRows,_MaxCols>& Eigen::Matrix<_Scalar,_MaxCols>::operator=(const Eigen::DenseBase<OtherDerived>&) [with OtherDerived = Eigen::Matrix<long int,1>; _Scalar = int; int _Rows = -1; int _Cols = 1; int _Options = 0; int _MaxRows = -1; int _MaxCols = 1]’
/usr/include/eigen3/Eigen/src/Core/PermutationMatrix.h:367
:17:
required from ‘Eigen::PermutationMatrix<SizeAtCompileTime,MaxSizeAtCompileTime,IndexType>& Eigen::PermutationMatrix<SizeAtCompileTime,IndexType>::operator=(const Eigen::PermutationBase<OtherDerived>&) [with Other = Eigen::PermutationMatrix<-1,long int>; int SizeAtCompileTime = -1; int MaxSizeAtCompileTime = -1; _StorageIndex = int]’
/home/armmlinux/zdfwork/work/SLAM/orb_slam/ORB_SLAM2-master/Thirdparty/g2o/g2o/solvers/linear_solver_eigen.h:68
:18:
required from ‘void g2o::LinearSolverEigen<MatrixType>::CholeskyDecomposition::analyzePatternWithPermutation(g2o::LinearSolverEigen<MatrixType>::SparseMatrix&,const PermutationMatrix&) [with MatrixType = Eigen::Matrix<double,7,7>; g2o::LinearSolverEigen<MatrixType>::SparseMatrix = Eigen::SparseMatrix<double,0>; g2o::LinearSolverEigen<MatrixType>::PermutationMatrix = Eigen::PermutationMatrix<-1,long int>]’
/home/armmlinux/zdfwork/work/SLAM/orb_slam/ORB_SLAM2-master/Thirdparty/g2o/g2o/solvers/linear_solver_eigen.h
:195:9:
required from ‘void g2o::LinearSolverEigen<MatrixType>::computeS
ymbolicDecomposition(const g2o::SparseBlockMatrix<MatrixType>&) [with MatrixType = Eigen::Matrix<double,7>]’
/home/armmlinux/zdfwork/work/SLAM/orb_slam/ORB_SLAM2-master/Thirdparty/g2o/g2o/solvers/linear_solver_eigen.h
:100:37:
required from ‘bool g2o::LinearSolverEigen<MatrixType>::solve(const g2o::SparseBlockMatrix<MatrixType>&,double*,double*) [with MatrixType = Eigen::Matrix<double,7>]’
/home/armmlinux/zdfwork/work/SLAM/orb_slam/ORB_SLAM2-master/src/Optimizer.cc
:1244
:1:
required from here
/usr/include/eigen3/Eigen/src/Core/util/Stati
Cassert.h:32
:40: error: static assertion Failed: YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY
#define EIGEN_STATIC_ASSERT(X,MSG) static_assert(X,#MSG
);
^
/usr/include/eigen3/Eigen/src/Core/util/Xpr
Helper.h:707:3: note: in expansion of macro ‘EIGEN_STATIC_ASSERT’
EIGEN_STATIC_ASSERT((internal::functor_is_product_like<BInop>:
:ret \
^
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:745:3: note: in expansion of macro ‘EIGEN_
checK_BINARY_COMPATIBILIY’
EIGEN_
checK_BINARY_COMPATIBILIY(Func,typ
ename Src::Scalar
);
^
CMakeFiles/ORB_SLAM2.dir/build.make:350: recipe for target 'CMakeFiles/ORB_SLAM2.dir/src/Optimizer.cc
.o' Failed
make[2]:
*** [CMakeFiles/ORB_SLAM2.dir/src/Optimizer.cc
.o] Error 1
CMakeFiles/Makefile2
:178: recipe for target 'CMakeFiles/ORB_SLAM2.dir/all' Failed
make[1]:
*** [CMakeFiles/ORB_SLAM2.dir/all] Error 2
Makefile:83: recipe for target 'all' Failed
@H_847_33
@make:
*** [all] Error 2
问题原因：Eigen3的bug
解决方法：
打开Thirdparty/g2o/g2o/solvers/linear_solver_eigen.h，将以下代码
1 template <typename MatrixType>
2 class LinearSolverEigen: public LinearSolver<MatrixType>
3 {
4 public:
5 typedef Eigen::SparseMatrix<double,Eigen::ColMajor> SparseMatrix;
6 typedef Eigen::Triplet<double> Triplet;
7 typedef Eigen::PermutationMatrix<Eigen::Dynamic,Eigen::Dynamic,SparseMatrix::Index> PermutationMatrix;
改为
1 template <typename MatrixType>
public LinearSolver<MatrixType>
3 {
public:
:1.5; color:rgb(128,Eigen::ColMajor> SparseMatrix;
double> Triplet;
8 typedef Eigen::PermutationMatrix<Eigen::Dynamic,int> PermutationMatrix;
9 /**
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