scalapack cmake target points to incorrect directory

[Steven Hahn]

I added "find_package(scalapack REQUIRED)" to the CMakeLists.txt of a project I'm working on. Instead of the scalapack target I was expecting, I got the following error:

CMake Error at /usr/lib/cmake/scalapack-2.1.0.openmpi/scalapack-targets.cmake:79 (message):
 The imported target "scalapack" references the file
   "/usr/lib/libscalapack-openmpi.so.2.1.0"
 but this file does not exist. Possible reasons include:
 * The file was deleted, renamed, or moved to another location.
 * An install or uninstall procedure did not complete successfully.
 * The installation package was faulty and contained
   "/usr/lib/cmake/scalapack-2.1.0.openmpi/scalapack-targets.cmake"
 but not all the files it references.
Call Stack (most recent call first):
 /usr/lib/cmake/scalapack-2.1.0.openmpi/scalapack-config.cmake:2 (include)
 test/CMakeLists.txt:23 (find_package)

I worked around this by replacing "lib" with "lib/x86_64-linux-gnu" in /usr/lib/cmake/scalapack-2.1.0.openmpi/scalapack-targets-none.cmake

$ lsb_release -rd
Description: Ubuntu 20.04.2 LTS
Release: 20.04

$ apt-cache policy libscalapack-openmpi2.1
libscalapack-openmpi2.1:
  Installed: 2.1.0-2build1
  Candidate: 2.1.0-2build1
  Version table:
 *** 2.1.0-2build1 500
        500 http://repoman.ornl.gov/ubuntu focal/universe amd64 Packages
        100 /var/lib/dpkg/status

[Steven (hahnse)]

The scalapack cmake target also points to /usr/lib/x86_64-linux-gnu/liblapack.so, which is provided by the liblapack-dev package. One either needs to add this package to the list of dependencies or link against /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3 provided by liblapack3.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.