How to fix linking error for linxal crate in Rust? - rust

Question

I tried running the example I found in the linxal crate for calculating eigenvalues, as follows:
#[macro_use]
extern crate linxal;
extern crate ndarray;
use linxal::eigenvalues::{Eigen};
use linxal::solve_linear::{SolveLinear};
use linxal::types::{c32};
use ndarray::{arr1, arr2};
fn main() {
let m = arr2(&[[1.0f32, 2.0],
[-2.0, 1.0]]);
let r = Eigen::compute(&m, false, false);
assert!(r.is_ok());
let r = r.unwrap();
let true_evs = arr1(&[c32::new(1.0, 2.0), c32::new(1.0, -2.0)]);
assert_eq_within_tol!(true_evs, r.values, 0.01);
let b = arr1(&[-1.0, 1.0]);
let x = SolveLinear::compute(&m, &b).unwrap();
let true_x = arr1(&[-0.6, -0.2]);
assert_eq_within_tol!(x, true_x, 0.0001);
}
The code above panicked with the following error:
= note: /usr/bin/ld: cannot find -lgfortran
So I installed gfortran and lapack:
sudo apt-get install gfortran libblas-dev liblapack-dev
Now the error is different:
= note: /usr/bin/ld: /home/marcelo/dev/rust/tests/target/debug/deps/tests-8044bb79540c2a73.1gluatgbtgjkbw4v.rcgu.o: in function `lapack::c::sgeev':
/home/marcelo/.cargo/registry/src/github.com-1ecc6299db9ec823/lapack-0.11.4/src/c.rs:1078: undefined reference to `LAPACKE_sgeev'
/usr/bin/ld: /home/marcelo/dev/rust/tests/target/debug/deps/tests-8044bb79540c2a73.1gluatgbtgjkbw4v.rcgu.o: in function `lapack::c::sgesv':
/home/marcelo/.cargo/registry/src/github.com-1ecc6299db9ec823/lapack-0.11.4/src/c.rs:1882: undefined reference to `LAPACKE_sgesv'
collect2: error: ld returned 1 exit status
= help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
= note: use the `-l` flag to specify native libraries to link
= note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)
I then installed LAPACKE with the following commands, but the error message did not change.
= note: /usr/bin/ld: /home/marcelo/dev/rust/tests/target/debug/deps/tests-8044bb79540c2a73.1gluatgbtgjkbw4v.rcgu.o: in function `lapack::c::sgeev':
/home/marcelo/.cargo/registry/src/github.com-1ecc6299db9ec823/lapack-0.11.4/src/c.rs:1078: undefined reference to `LAPACKE_sgeev'
/usr/bin/ld: /home/marcelo/dev/rust/tests/target/debug/deps/tests-8044bb79540c2a73.1gluatgbtgjkbw4v.rcgu.o: in function `lapack::c::sgesv':
/home/marcelo/.cargo/registry/src/github.com-1ecc6299db9ec823/lapack-0.11.4/src/c.rs:1882: undefined reference to `LAPACKE_sgesv'
collect2: error: ld returned 1 exit status
= help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
= note: use the `-l` flag to specify native libraries to link
= note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)
The commands:
sudo apt update
sudo apt install liblapack3
sudo apt install liblapack-dev
sudo apt install libopenblas-base
sudo apt install libopenblas-dev
sudo apt install liblapacke-dev
sudo apt install liblapack-dev
What do I have to do to make the example work?
Thanks in advance!