Bug 1729747

Summary: lapack is not compatible with fortran 90+
Product: [Fedora] Fedora Reporter: RudraB <bnrj.rudra>
Component: lapackAssignee: Tom "spot" Callaway <tcallawa>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
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Version: 30CC: c.david86, tcallawa
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Last Closed: 2020-01-06 14:23:58 UTC Type: Bug
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Description RudraB 2019-07-14 06:35:07 UTC 
Description of problem:
Hi,

when `lapack` can be used as a library, it is not callable as a module.

Version-Release number of selected component (if applicable):
lapack-3.8.0-12.fc30.x86_64

How reproducible:
every time. It is a general property.

Steps to Reproduce:
Consider a simple `hello_world`
Program  hello
  use iso_fortran_env
  Implicit None
  integer(int32), parameter :: lda = 3, lwmax = 100
  real(real32) :: a(lda, lda), w(lda)
  integer(int32) :: i, j, lwork, info, work
  write(*,*) "Hello"
  LWORK = -1
  CALL DSYEV( 'Vectors', 'Upper', lda, A, LDA, W, WORK, LWORK, INFO )

End Program  hello

this can be compiled as gfortran -llapack hello.f90

But, codes where lapack is used as a module, can not be compiled, as example given http://www.netlib.org/lapack95/lug95/node52.html 

Actual results:
The code in the link gives error:
  8 |   USE LA_PRECISION, ONLY: WP => SP
      |      1
Fatal Error: Cannot open module file ‘la_precision.mod’ for reading at (1): No such file or directory
Comment 1 Tom "spot" Callaway 2020-01-06 14:23:58 UTC 
Apologies for the delay in responding. I believe you are confusing two different pieces of software.

* LAPACK: http://www.netlib.org/lapack/ 
* LAPACK95: http://www.netlib.org/lapack95/

LAPACK95 has not been updated since November 2000. It contains support for modules.

LAPACK has no support for modules, so there is nothing missing from Fedora's version.

The example you cite is specifically for LAPACK95, which is not currently part of Fedora. The licensing of LAPACK95 is unclear, as no license is included in the available source code. Additionally, I suspect it is quite likely that it is incompatible with modern LAPACK.