Error during compilation

[argolomb]

I'm facing problems during compilation.
System: ubuntu 16.04
Opencv 3.4

/root/camodocal/src/npoint/five-point/five-point.cpp: In function ‘cv::Mat findEssentialMat(cv::InputArray, cv::InputArray, double, cv::Point2d, int, double, double, int, cv::OutputArray)’:
/root/camodocal/src/npoint/five-point/five-point.cpp:61:13: error: conversion from ‘cv::Mat’ to non-scalar type ‘CvMat’ requested
CvMat p1 = points1;
^
/root/camodocal/src/npoint/five-point/five-point.cpp:62:13: error: conversion from ‘cv::Mat’ to non-scalar type ‘CvMat’ requested
CvMat p2 = points2;
^
/root/camodocal/src/npoint/five-point/five-point.cpp:63:13: error: conversion from ‘cv::Mat’ to non-scalar type ‘CvMat’ requested
CvMat _E = E;

[ 23%] Building CXX object src/pugixml/CMakeFiles/camodocal_pugixml.dir/pugixml.cpp.o
src/npoint/CMakeFiles/camodocal_fivepoint.dir/build.make:62: recipe for target 'src/npoint/CMakeFiles/camodocal_fivepoint.dir/five-point/five-point.cpp.o' failed
make[2]: *** [src/npoint/CMakeFiles/camodocal_fivepoint.dir/five-point/five-point.cpp.o] Error 1
make[1]: *** [src/npoint/CMakeFiles/camodocal_fivepoint.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

[LSXiang]

using eg. CvMat p1 = cvMat(points1) to change code