ImportError of LAPACKE_zheev in starting phono3py

[FurinaWai77]

Check the develop branch
The latest phonopy and phono3py

Describe the bug
Whenever I start phono3py it occurs
Traceback (most recent call last): File "/home/kawaiinahida/.local/bin/phono3py", line 45, in <module> main(**argparse_control) File "/home/kawaiinahida/phono3py/phono3py/cui/phono3py_script.py", line 837, in main args, log_level = start_phono3py(**argparse_control) File "/home/kawaiinahida/phono3py/phono3py/cui/phono3py_script.py", line 225, in start_phono3py import phono3py._phono3py as phono3c ImportError: /home/kawaiinahida/phono3py/phono3py/_phono3py.cpython-310-x86_64-linux-gnu.so: undefined symbol: LAPACKE_zheev

To Reproduce
Steps to reproduce the behavior:
Python 3.10, WSL2 Ubuntu 22.02
I installed from source code refering to the instructions. LAPACKE is installed through
sudo apt-get install liblapack-dev liblapacke-dev
And phono3py is installed using
pip install -e . -vvv
I don't know whether LAPACKE is incorrectly imported. Phonopy works fine.

[atztogo]

In phonopy, lapacke is not used and lapack is not used directly.

I expect it works on ubuntu on WSL2, too. But since I don't have windows system here right now, it is not possible to examine it.

You may have to set LD_LIBRARY_PATH to let your python interpreter find the library location. On my usual ubuntu 22.04, lapacke seems to be installed /usr/lib/x86_64-linux-gnu. But in this system, I didn't need to set up LD_LIBRART_PATH.

These issues are sometimes tough to solve from the developer side. So could you try the conda version if it is possible?

[LecrisUT]

It is used here:

phono3py/c/lapack_wrapper.h

Lines 44 to 46 in de08304

	#else
	#include <lapacke.h>
	#endif

phono3py/c/lapack_wrapper.c

Lines 56 to 62 in de08304

	int phonopy_zheev(double *w, lapack_complex_double *a, const int n,
	const char uplo) {
	lapack_int info;
	info = LAPACKE_zheev(LAPACK_ROW_MAJOR, 'V', uplo, (lapack_int)n, a,
	(lapack_int)n, w);
	return (int)info;
	}

I am investigating this issue in the refactoring and it would be appreciated if @FurinaWai77 can help test some things out. One immediate issue is to find what blas/lapack library it is being linked to since FlexiBLAS which is the recent default does not support Lapacke. @FurinaWai77 can you run readelf -d on the compiled libraries?

[atztogo]

I believe the best strategy for users is to provide phono3py without requiring a link to LAPACKE in C. To implement this, I have submitted a pull request (now in develop branch) and this version will be released someday soon. For details, see #301.