Eigen/Core: No such file or directory

[josemq]

Please help I'm running into the following error while compiling Flashpca:

g++ -Ispectra/include -I/usr/local/include/boost -I/usr/local/include/eigen -march=native -std=c++0x -O3 -DNDEBUG -DVERSION="2.1" -funroll-loops -ftree-vectorize -ffast-math -c flashpca.cpp -o flashpca.o
In file included from flashpca.cpp:22:0:
data.h:18:22: fatal error: Eigen/Core: No such file or directory
#include <Eigen/Core>
^
compilation terminated.
Makefile:54: recipe for target 'flashpca.o' failed
make: *** [flashpca.o] Error 1

[mmokrejs]

You do not have /usr/local/include/boost/Eigen/Core present.

Use find / -type d -name Eigen to fidn places where you have your stuff.

Edit the Makefile or add the variables with those unleashed paths after the make all command, e.g.:

CXX=clang++-12 CC=clang-12 make all EIGEN_INC=/usr/include/eigen3 BOOST_INC=/usr/include/boost BOOST_LIB=/usr/lib/x86_64-linux-gnu SPECTRA_INC=/home/biomex/include/