CMake fails for downstream package

[skasperski]

Since a recent update my package using pointmatcher fails with a CMake error. I installed pointmatcher via normal "cmake + make install" and use it from my package like this:

find_package(libpointmatcher REQUIRED)
add_library(pm_test test.cpp)
target_link_libraries(pm_test PUBLIC pointmatcher)

However this fails with:

CMake Error in CMakeLists.txt:
  Imported target "pointmatcher" includes non-existent path

    "/usr/local/pointmatcher"

  in its INTERFACE_INCLUDE_DIRECTORIES.  Possible reasons include:

  * The path was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and references files it does not
  provide.

Trying to solve this I stumbled across multiple (and different) versions of pointmatcher's cmake-files in these 2 locations:

/usr/local/lib/cmake/pointmatcher
-rw-r--r-- 1 root root 3310 Feb 16 16:48 libpointmatcherConfig.cmake
-rw-r--r-- 1 root root  362 Feb 16 16:48 libpointmatcherConfigVersion.cmake

and

/usr/local/share/libpointmatcher/cmake
-rw-r--r-- 1 root root 3908 Feb 16 16:48 libpointmatcher-config.cmake
-rw-r--r-- 1 root root 3310 Feb 16 16:48 libpointmatcherConfig.cmake
-rw-r--r-- 1 root root  833 Feb 16 16:48 libpointmatcher-config-release.cmake
-rw-r--r-- 1 root root  362 Feb 16 16:48 libpointmatcherConfigVersion.cmake
-rw-r--r-- 1 root root 3137 Feb 16 16:48 yaml-cpp-pm-targets.cmake
-rw-r--r-- 1 root root  826 Feb 16 16:48 yaml-cpp-pm-targets-release.cmake

I assume this makes it undefined which version is actually used by CMake's find_package call.

[aguenette]

Hi @skasperski! Did you solve your issue? If not, you can try this instead:

find_package(libpointmatcher REQUIRED)
include_directories(${libpointmatcher_INCLUDE_DIRS})
add_library(pm_test test.cpp)
target_link_libraries(pm_test PUBLIC ${libpointmatcher_LIBRARIES})

[skasperski]

This gives me:

CMake Error:
  Error evaluating generator expression:

    $<TARGET_FILE:pointmatcher>

  No target "pointmatcher"

[aguenette]

Have you tried to configure your project using a new build directory?

If it does not solve your issue, I would need to know which cmake's version you are using and what is the minimum version that is configured in your project's CMakeLists.txt file. Thanks!

[pomerlef]

Also, if you're on Ubuntu, give us the output of that script to simplify the process: https://github.com/ethz-asl/libpointmatcher/blob/master/utest/listVersionsUbuntu.sh

[skasperski]

Sorry for late reply, somehow lost track of this.

I completely rebuild everything several times. My cmake version is 3.10.2 (default on Ubuntu 18.04). In my CMakeLists I have "cmake_minimum_required(VERSION 3.0)".

Output of the script above:

Name        | Version
----------------|-------------------------------
ubuntu:     | Description: Ubuntu 18.04.5 LTS
architecture:   | 64-bit
gcc:        | gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
git:        | git version 2.17.1
cmake:      | cmake version 3.10.2 CMake suite maintained and supported by Kitware (kitware.com/cmake).
boost:      | Version: 1.65.1.0ubuntu1
eigen3:     | Version: 3.3.4-4
doxygen:    | Version: 1.8.13-10

[skasperski]

I now also tried building this inside a catkin workspace, which gives me the same error.