flann/flann.hpp: No such file or directory

[liubaoryol]

When trying to install megaman and running python setup.py intsall, I get the following fatal error:

In file included from megaman/geometry/cyflann/index.cxx:620:0:
megaman/geometry/cyflann/cyflann_index.h:8:10: fatal error: flann/flann.hpp: No such file or directory
#include <flann/flann.hpp>
^~~~~~~~~~~~~~~~~
compilation terminated.

How could I fix it?

[JoaoJanini]

Have you figured it out ?

[evtodorov]

Had the same, looks like an issue with the location of the header files for the FLANN library. First think to try is setting the FLANN_ROOT environment variable; For me at least this didn't really work as the structure of the FLANN root didn't match the one megaman was expecting, so I simply copied the header files to megaman\geometry\cyflann\include\flann which seemed to solve this

[cookbook-ms]

same issue.. i used homebrew to install flann and removed the one i installed by pip, then the source installation worked

For example, my Homebrew installed flann at this location

/opt/homebrew/Cellar/flann/1.9.2_1

I then changed FLANN_ROOT variable in the file megaman/geometry/cyflann/setup.py as

# FLANN_ROOT = os.environ.get('FLANN_ROOT', sys.exec_prefix)
FLANN_ROOT = '/opt/homebrew/Cellar/flann/1.9.2_1'