CMakeLists.txt: don't include CERES_INCLUDE_DIRS if it's empty or not set

[shr-project]

• possibly partial fix for:
  CartographerTargets.cmake contains absolute paths #1688

• ceres documentation says:
  http://ceres-solver.org/installation.html#using-ceres-with-cmake
  Note
  You do not need to call include_directories(${CERES_INCLUDE_DIRS})
  as the exported Ceres CMake target already contains the definitions
  of its public include directories which will be automatically
  included by CMake when compiling a target that links against Ceres.
  In fact, since v2.0 CERES_INCLUDE_DIRS is not even set.

• see ceres-solver change:
  https://ceres-solver.googlesource.com/ceres-solver/+/2166bad133d279ec28008f1df8b4d90a7023f531

• otherwise its source directory ends in INTERFACE_INCLUDE_DIRECTORIES/INTERFACE_SYSTEM_INCLUDE_DIRECTORIES
  variables like this:

set_target_properties(cartographer PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "FIXMESTAGINGDIRTARGET/usr/include/eigen3;/jenkins/mjansa/build/ros/ros1-melodic-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer/1.0.0-r0/git/;FIXMESTAGINGDIRTARGET/usr/include;FIXMESTAGINGDIRTARGET/usr/include;FIXMESTAGINGDIRTARGET/usr/include/cairo;FIXMESTAGINGDIRTARGET/usr/include/glib-2.0;FIXMESTAGINGDIRTARGET/usr/lib/glib-2.0/include;FIXMESTAGINGDIRTARGET/usr/include/pixman-1;FIXMESTAGINGDIRTARGET/usr/include/uuid;FIXMESTAGINGDIRTARGET/usr/include/freetype2;FIXMESTAGINGDIRTARGET/usr/include/libpng16;FIXMESTAGINGDIRTARGET/usr/include;${_IMPORT_PREFIX}/include"
INTERFACE_LINK_LIBRARIES "Ceres::ceres;FIXMESTAGINGDIRTARGET/usr/lib/liblua.a;FIXMESTAGINGDIRTARGET/usr/lib/libm.so;Boost::iostreams;glog;gflags;cairo;FIXMESTAGINGDIRTARGET/usr/lib/libprotobuf.so;pthread"
INTERFACE_SYSTEM_INCLUDE_DIRECTORIES "FIXMESTAGINGDIRTARGET/usr/include/eigen3;/jenkins/mjansa/build/ros/ros1-melodic-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer/1.0.0-r0/git/;FIXMESTAGINGDIRTARGET/usr/include;FIXMESTAGINGDIRTARGET/usr/include;FIXMESTAGINGDIRTARGET/usr/include/cairo;FIXMESTAGINGDIRTARGET/usr/include/glib-2.0;FIXMESTAGINGDIRTARGET/usr/lib/glib-2.0/include;FIXMESTAGINGDIRTARGET/usr/include/pixman-1;FIXMESTAGINGDIRTARGET/usr/include/uuid;FIXMESTAGINGDIRTARGET/usr/include/freetype2;FIXMESTAGINGDIRTARGET/usr/include/libpng16;FIXMESTAGINGDIRTARGET/usr/include"
)

• otherwise the paths to cartographer WORKDIR end in CartographerTargets.cmake
  INTERFACE_INCLUDE_DIRECTORIES, INTERFACE_SYSTEM_INCLUDE_DIRECTORIES variables
  and cartographer-ros fails to configure if cartographer WORKDIR was already
  removed (e.g. when cartographer used from sstate or cleaned with rm_work)

  ./recipe-sysroot/usr/share/cartographer/cmake/CartographerTargets.cmake: INTERFACE_INCLUDE_DIRECTORIES "/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/eigen3;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer/1.0.0-r0/git/;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/cairo;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/glib-2.0;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/lib/glib-2.0/include;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/pixman-1;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/uuid;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/freetype2;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/libpng16;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include;${_IMPORT_PREFIX}/include"

  ./recipe-sysroot/usr/share/cartographer/cmake/CartographerTargets.cmake: INTERFACE_SYSTEM_INCLUDE_DIRECTORIES "/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/eigen3;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer/1.0.0-r0/git/;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/cairo;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/glib-2.0;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/lib/glib-2.0/include;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/pixman-1;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/uuid;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/freetype2;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include/libpng16;/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer-ros/1.0.0-1-r0/recipe-sysroot/usr/include"

• fixes cartographer-ros do_configure error:
  -- Configuring done
  CMake Error in CMakeLists.txt:
  Imported target "cartographer" includes non-existent path

  "/jenkins/mjansa/build/ros/ros2-rolling-hardknott/tmp-glibc/work/core2-64-oe-linux/cartographer/1.0.0-r0/git/"

  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.

Signed-off-by: Martin Jansa martin.jansa@lge.com

Want to contribute? Great! Make sure you've read and understood
CONTRIBUTING.md.

[shr-project]

Alternative solution is to remove quotes around CERES_INCLUDE_DIRS (and possibly other variables later used in target_include_directories calls).

Relevant discussion and a bug in CMake:
https://discourse.cmake.org/t/target-include-directories-behavior-with-empty-value/2867
https://gitlab.kitware.com/cmake/cmake/-/issues/21879