installation error in ORB_SLAM3 on Ubuntu 18

Question

I am trying to install ORB_SLAM3 on Ubuntu 18... I also installed all Prerequisites but when I run ./build.sh I face with this error:

CMakeFiles/ORB_SLAM3.dir/build.make:62: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/System.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/System.cc.o] Error 1
CMakeFiles/ORB_SLAM3.dir/build.make:302: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/Atlas.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/Atlas.cc.o] Error 1
CMakeFiles/ORB_SLAM3.dir/build.make:206: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/FrameDrawer.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/FrameDrawer.cc.o] Error 1
CMakeFiles/ORB_SLAM3.dir/build.make:494: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/Viewer.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/Viewer.cc.o] Error 1
CMakeFiles/ORB_SLAM3.dir/build.make:110: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/LocalMapping.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/LocalMapping.cc.o] Error 1
CMakeFiles/ORB_SLAM3.dir/build.make:470: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/Initializer.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/Initializer.cc.o] Error 1
CMakeFiles/ORB_SLAM3.dir/build.make:86: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/Tracking.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/Tracking.cc.o] Error 1
CMakeFiles/ORB_SLAM3.dir/build.make:134: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/LoopClosing.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/LoopClosing.cc.o] Error 1
CMakeFiles/ORB_SLAM3.dir/build.make:374: recipe for target 'CMakeFiles/ORB_SLAM3.dir/src/Optimizer.cc.o' failed
make[2]: *** [CMakeFiles/ORB_SLAM3.dir/src/Optimizer.cc.o] Error 1
CMakeFiles/Makefile2:289: recipe for target 'CMakeFiles/ORB_SLAM3.dir/all' failed
make[1]: *** [CMakeFiles/ORB_SLAM3.dir/all] Error 2

during executing the code this error is also showed:

fatal error: Eigen/Core: No such file or directory
 #include <Eigen/Core>

could anyone do me a favor and help me with this issue??

Answer 1

it's been solved by replacing #include<Eigen/Core> to include<eigen3/Eigen/Core> in all files that include this library.
OR
run sudo cp -r /usr/include/eigen3/Eigen /usr/include in terminal instead.