Eigen library

Hi everyone,
I’m doing an university project and I’m trying to use the library “Eigen” (i’ve noticed that px4 uses it’s own structure for matrix multiplication but for other reasons i should use Eigen).

Including the library i got this type of error:
Eigen/Dense: No such file or directory

I have to simply include the library somewhere in the code?( I’ve seen on the web that PX4 has some problems including Eigen due to NUTTX)

Problem solved, i simply added the library into the folder lib, add the folder into the Cmakefiles and then included in a module as DEPENDS.
I also had to remove warning as error that caused problems with eigen.