ch6/g2o_curve_fitting/CMakeLists.txt issue

[TirelessTinkerer]

After checking cmake_modules/FindG2O.cmake, I think the following part of the CMakeLists.txt of g2o_curve_fitting should be adjusted:

1. ${G2O_INCLUDE_DIRS} should be ${G2O_INCLUDE_DIR}, which is a variable generated by FindG2O.

2. target_link_libraries( curve_fitting 
   ${OpenCV_LIBS}
   g2o_core g2o_stuff
   )

   should be

   target_link_libraries( curve_fitting 
   ${OpenCV_LIBS}
   ${G2O_CORE_LIBRARY} ${G2O_STUFF_LIBRARY}
   )

   Without modifying 1, I can still build the code without problem. It's because /usr/local/include is in my default header search path. Without modifying 2, I got the following error when run curve_fitting (since my library load path does not contain /usr/local/lib )

   error while loading shared libraries: libg2o_core.so: cannot open shared object file: No such file or directory

[Will-panda]

Yes,u are right . It's helping .thank u !

[Krasaa]

thx！

[hanzheteng]

From https://github.com/gaoxiang12/slambook/issues/125#issuecomment-603575294, to temporarily add the search path, the following way also works:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib