ubuntu16-04+g2o
ubuntu16+g2o
步骤：
１)删除本机已经安装的g2o的可执行文件（https://github.com/RainerKuemmerle/g2o）：
sudo rm -r /usr/local/lib/libg2o* /usr/local/include/g2o /usr/local/lib/g2o /usr/local/bin/g2o*
２)安装当前下载的g2o文件步骤（https://github.com/gaoxiang12/rgbd-slam-tutorial-gx/blob/master/g2o.zip）：
安装依赖库：
sudo apt-get install libeigen3-dev libsuitesparse-dev libqt4-dev qt4-qmake libqglviewer-dev
安装：
cd g2o
mkdir build
cd build
cmake ..
make
sudo make install３）cmake ..结果（如果报错，要么就是库没有安装合适，要么就是cmakeList.txt文件出错．或其他什么原因，主要是学会看报错内容．）：
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Compiling on Unix
-- Found CHOLMOD: /usr/include/suitesparse
-- Looking for sgemm_
-- Looking for sgemm_ - found
-- A library with BLAS API found.
-- Looking for cheev_
-- Looking for cheev_ - found
-- A library with LAPACK API found.
-- Found CHOLMOD and its dependencies
-- Found CSPARSE: /usr/include/suitesparse
-- Try OpenMP C flag = [-fopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Success
-- Try OpenMP CXX flag = [-fopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Success
-- Found OpenMP: -fopenmp
-- Found OpenGL: /usr/lib/x86_64-linux-gnu/libGL.so
-- Compiling with OpenGL support
-- Looking for Q_WS_X11
-- Looking for Q_WS_X11 - found
-- Looking for Q_WS_WIN
-- Looking for Q_WS_WIN - not found
-- Looking for Q_WS_QWS
-- Looking for Q_WS_QWS - not found
-- Looking for Q_WS_MAC
-- Looking for Q_WS_MAC - not found
-- Found Qt4: /usr/bin/qmake (found version "4.8.7")
-- Found QGLVIEWER: /usr/include/QGLViewer
-- Compiling g2o apps
-- Compiling g2o examples
-- Compiling with GCC
-- Found Eigen3: /usr/include/eigen3 (Required is at least version "2.91.0")
-- Configuring done
-- Generating done
-- Build files have been written to: /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/build
4）执行make命令生成可执行文件（这个过程中回存在很多问题需要我们一步一步的来改）：
make错误１－－－执行在３１％时报错：
[ 31%] Building CXX object g2o/types/slam2d/CMakeFiles/types_slam2d.dir/edge_se2_pointxy_bearing.cpp.o
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/types/slam2d/edge_se2_pointxy_bearing.cpp: In member function ‘virtual void g2o::EdgeSE2PointXYBearing::initialEstimate(const VertexSet&, g2o::OptimizableGraph::Vertex*)’:
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/types/slam2d/edge_se2_pointxy_bearing.cpp:50:52: error: no matching function for call to ‘g2o::SE2::setRotation(Eigen::Rotation2D
t.setRotation(t.rotation().angle()+_measurement);
^
In file included from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/types/slam2d/vertex_se2.h:33:0,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/types/slam2d/edge_se2_pointxy_bearing.h:31,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/types/slam2d/edge_se2_pointxy_bearing.cpp:27:
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/types/slam2d/se2.h:56:12: note: candidate: void g2o::SE2::setRotation(const Rotation2Dd&)
void setRotation(const Rotation2Dd& R_) {_R=R_;}
^
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/types/slam2d/se2.h:56:12: note: no known conversion for argument 1 from ‘Eigen::Rotation2D
g2o/types/slam2d/CMakeFiles/types_slam2d.dir/build.make:206: recipe for target 'g2o/types/slam2d/CMakeFiles/types_slam2d.dir/edge_se2_pointxy_bearing.cpp.o' failed
make[2]: *** [g2o/types/slam2d/CMakeFiles/types_slam2d.dir/edge_se2_pointxy_bearing.cpp.o] Error 1
CMakeFiles/Makefile2:802: recipe for target 'g2o/types/slam2d/CMakeFiles/types_slam2d.dir/all' failed
make[1]: *** [g2o/types/slam2d/CMakeFiles/types_slam2d.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2
错误１－－－－解决方法：
打开文件：./g2o/g2o/types/slam2d/edge_se2_pointxy_bearing.cpp文件
将代码：
t.setRotation(t.rotation().angle()+_measurement);
改成：
t.setRotation((Eigen::Rotation2Dd)(t.rotation().angle()+_measurement));
错误2：
[ 42%] Building CXX object g2o/apps/g2o_viewer/CMakeFiles/viewer_library.dir/g2o_qglviewer.cpp.o
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/apps/g2o_viewer/g2o_qglviewer.cpp:46:13: error: conflicting return type specified for ‘virtual float g2o::{anonymous}::StandardCamera::zNear() const’
float zNear() const {
^
In file included from /usr/include/QGLViewer/qglviewer.h:26:0,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/apps/g2o_viewer/g2o_qglviewer.h:22,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/apps/g2o_viewer/g2o_qglviewer.cpp:19:
/usr/include/QGLViewer/camera.h:231:16: error: overriding ‘virtual qreal qglviewer::Camera::zNear() const’
virtual qreal zNear() const;
^
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/apps/g2o_viewer/g2o_qglviewer.cpp:53:13: error: conflicting return type specified for ‘virtual float g2o::{anonymous}::StandardCamera::zFar() const’
float zFar() const
^
In file included from /usr/include/QGLViewer/qglviewer.h:26:0,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/apps/g2o_viewer/g2o_qglviewer.h:22,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/apps/g2o_viewer/g2o_qglviewer.cpp:19:
/usr/include/QGLViewer/camera.h:232:16: error: overriding ‘virtual qreal qglviewer::Camera::zFar() const’
virtual qreal zFar() const;
^
g2o/apps/g2o_viewer/CMakeFiles/viewer_library.dir/build.make:80: recipe for target 'g2o/apps/g2o_viewer/CMakeFiles/viewer_library.dir/g2o_qglviewer.cpp.o' failed
make[2]: *** [g2o/apps/g2o_viewer/CMakeFiles/viewer_library.dir/g2o_qglviewer.cpp.o] Error 1
CMakeFiles/Makefile2:610: recipe for target 'g2o/apps/g2o_viewer/CMakeFiles/viewer_library.dir/all' failed
make[1]: *** [g2o/apps/g2o_viewer/CMakeFiles/viewer_library.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2
问题2解决方法：
用其他安装包中的g2o_qglviewer.cpp文件替换
路径为：
rgbd-slam-tutorial-gx-master/g2o/g2o/apps/g2o_viewer/g2o_qglviewer.cpp
问题3：
[ 68%] Building CXX object g2o/solvers/eigen/CMakeFiles/solver_eigen.dir/solver_eigen.cpp.o
In file included from /usr/include/eigen3/Eigen/Core:297:0,
from /usr/include/eigen3/Eigen/SparseCore:11,
from /usr/include/eigen3/Eigen/Sparse:26,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/solvers/eigen/linear_solver_eigen.h:30,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/solvers/eigen/solver_eigen.cpp:17:
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h: In instantiation of ‘void Eigen::internal::call_assignment_no_alias(Dst&, const Src&, const Func&) [with Dst = Eigen::Matrix
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:712:27: required from ‘void Eigen::internal::call_assignment(Dst&, const Src&, const Func&, typename Eigen::internal::enable_if<(! Eigen::internal::evaluator_assume_aliasing
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:693:18: required from ‘void Eigen::internal::call_assignment(Dst&, const Src&) [with Dst = Eigen::Matrix
/usr/include/eigen3/Eigen/src/Core/PlainObjectBase.h:682:32: required from ‘Derived& Eigen::PlainObjectBase
/usr/include/eigen3/Eigen/src/Core/Matrix.h:225:24: required from ‘Eigen::Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>& Eigen::Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>::operator=(const Eigen::DenseBase
/usr/include/eigen3/Eigen/src/Core/PermutationMatrix.h:367:17: required from ‘Eigen::PermutationMatrix
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/solvers/eigen/linear_solver_eigen.h:66:18: required from ‘void g2o::LinearSolverEigen
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/solvers/eigen/linear_solver_eigen.h:193:9: required from ‘void g2o::LinearSolverEigen
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/solvers/eigen/linear_solver_eigen.h:98:37: required from ‘bool g2o::LinearSolverEigen
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/solvers/eigen/solver_eigen.cpp:109:1: required from here
/usr/include/eigen3/Eigen/src/Core/util/StaticAssert.h:119:9: error: ‘YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY’ is not a member of ‘Eigen::internal::static_assertion
if (Eigen::internal::static_assertion
^
/usr/include/eigen3/Eigen/src/Core/util/XprHelper.h:707:3: note: in expansion of macro ‘EIGEN_STATIC_ASSERT’
EIGEN_STATIC_ASSERT((internal::functor_is_product_like
^
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:745:3: note: in expansion of macro ‘EIGEN_CHECK_BINARY_COMPATIBILIY’
EIGEN_CHECK_BINARY_COMPATIBILIY(Func,typename ActualDstTypeCleaned::Scalar,ty
^
g2o/solvers/eigen/CMakeFiles/solver_eigen.dir/build.make:62: recipe for target 'g2o/solvers/eigen/CMakeFiles/solver_eigen.dir/solver_eigen.cpp.o' failed
make[2]: *** [g2o/solvers/eigen/CMakeFiles/solver_eigen.dir/solver_eigen.cpp.o] Error 1
CMakeFiles/Makefile2:1682: recipe for target 'g2o/solvers/eigen/CMakeFiles/solver_eigen.dir/all' failed
make[1]: *** [g2o/solvers/eigen/CMakeFiles/solver_eigen.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2
问题3解决：
打开文件目录：g2o/g2o/solvers/eigen/linear_solver_eigen.h
template
class LinearSolverEigen: public LinearSolver
{
public:
typedef Eigen::SparseMatrix SparseMatrix;
typedef Eigen::Triplet Triplet;
typedef Eigen::PermutationMatrix PermutationMatrix;
改成
template
class LinearSolverEigen: public LinearSolver
{
public:
typedef Eigen::SparseMatrix SparseMatrix;
typedef Eigen::Triplet Triplet;
typedef Eigen::PermutationMatrix PermutationMatrix; 问题4：
[ 73%] Building CXX object g2o/examples/tutorial_slam2d/CMakeFiles/tutorial_slam2d_library.dir/simulator.cpp.o
In file included from /usr/include/eigen3/Eigen/Core:297:0,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/examples/tutorial_slam2d/se2.h:35,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/examples/tutorial_slam2d/simulator.h:30,
from /home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/examples/tutorial_slam2d/simulator.cpp:27:
/usr/include/eigen3/Eigen/src/Core/PlainObjectBase.h: In instantiation of ‘void Eigen::PlainObjectBase
/usr/include/eigen3/Eigen/src/Core/Matrix.h:296:31: required from ‘Eigen::Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>::Matrix(const T&) [with T = g2o::tutorial::Simulator::MotionType; _Scalar = double; int _Rows = -1; int _Cols = 1; int _Options = 0; int _MaxRows = -1; int _MaxCols = 1]’
/home/wangle/pcl/rgbd-slam-tutorial-gx-master/g2o/g2o/examples/tutorial_slam2d/simulator.cpp:78:39: required from here
/usr/include/eigen3/Eigen/src/Core/util/StaticAssert.h:119:9: error: ‘FLOATING_POINT_ARGUMENT_PASSED__INTEGER_WAS_EXPECTED’ is not a member of ‘Eigen::internal::static_assertion
if (Eigen::internal::static_assertion
^
/usr/include/eigen3/Eigen/src/Core/PlainObjectBase.h:745:7: note: in expansion of macro ‘EIGEN_STATIC_ASSERT’
EIGEN_STATIC_ASSERT(is_integer,
^
g2o/examples/tutorial_slam2d/CMakeFiles/tutorial_slam2d_library.dir/build.make:206: recipe for target 'g2o/examples/tutorial_slam2d/CMakeFiles/tutorial_slam2d_library.dir/simulator.cpp.o' failed
make[2]: *** [g2o/examples/tutorial_slam2d/CMakeFiles/tutorial_slam2d_library.dir/simulator.cpp.o] Error 1
CMakeFiles/Makefile2:1897: recipe for target 'g2o/examples/tutorial_slam2d/CMakeFiles/tutorial_slam2d_library.dir/all' failed
make[1]: *** [g2o/examples/tutorial_slam2d/CMakeFiles/tutorial_slam2d_library.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2
问题4解决方法：
删除rgbd-slam-tutorial-gx-master/g2o/g2o文件夹下的examples文件夹（注意删除相应的camkeList.txt文件中关于该文件夹的make语句）
# Examples
IF(G2O_BUILD_EXAMPLES)
ADD_SUBDIRECTORY(examples)
ENDIF(G2O_BUILD_EXAMPLES)
在运行生成的可执行文件时：找不到这个libg2o_core.so的解决办法：
sudo gedit /etc/ld.so.conf（会打开一个文件）
/usr/local/lib（这行添加到打开的文件中保存）
sudo ldconfig（运行）我遇到的就是如上的这5个问题．