HOW TO install OenBLAS (lapack cblas blas) ubuntu 20.04 so that everything is linked?

Question

C++ / C#

I'm trying to install, I'm running a test program in QT, and it says to me that it doesn't see lapack.so3. libcblas.so.3
/usr/bin/ld: CMakeFiles/dlibCu.dir/main.cpp.o: undefined reference to symbol 'dgesvd_'
/usr/bin/ld: /usr/local/lib/liblapack.so.3 : error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

Answer 1

https://stackoverflow.com/questions/17710602/linux...

Answer 2

HOW TO install OenBLAS (lapack cblas blas) ubuntu 20.04

Install these packages and their -dev packages from the package manager.

/usr/local/lib/liblapack.so.3

And you have /usr/local instead. What for?