Robotics Systems Types

Actually this is probably only necessary for include paths, as libraries are already exposed in the depends files:

SET(CMAKE_IMPORT_FILE_VERSION 1)

# Create imported target rstconverters
ADD_LIBRARY(rstconverters SHARED IMPORTED)

# Import target "rstconverters" for configuration "debug" 
SET_PROPERTY(TARGET rstconverters APPEND PROPERTY IMPORTED_CONFIGURATIONS DEBUG)
SET_TARGET_PROPERTIES(rstconverters PROPERTIES
  IMPORTED_LINK_INTERFACE_LIBRARIES_DEBUG "rsb;rst;rstsandbox;opencv_gpu;opencv_contrib;opencv_legacy;opencv_objdetect;opencv_calib3d;opencv_features2d;opencv_video;opencv_highgui;opencv_ml;opencv_imgproc;opencv_flann;opencv_core" 
  IMPORTED_LOCATION_DEBUG "/homes/jwienke/workspace/git/rst-converters/cpp/build-master/build/librstconverters.so.0.9" 
  IMPORTED_SONAME_DEBUG "librstconverters.so.0.9" 
  )

In a dependeing project this leads to

/usr/bin/ld: warning: libcv.so.2.1, needed by [...]/lib/librstconverters.so.0.9, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: libml.so.2.1, needed by [...]/lib/librstconverters.so.0.9, not found (try using -rpath or -rpath-link)
[...]

So it seems that library dirs for e.g. opencv libraries are not properly exposed.

Feedback by Alexandre Tuleu:

I have a file /usr/share/rst-converters0.9/rst-converters-depends-relWithDebInfo.cmake that contains linking flags to opencv
I have looked up upon /usr/include/rst-converters0.9 and there is no include to any OpenCV files.
So it seems that OpenCV is an implicit hidden dependency of rst-converters. User of rst-converters does not have to use any symbol of opencv.
But the depends file make this explicit, by exporting the linking flags (but it should be removable, as dependencies on rst-converters does not need any opencv symbols).
But the config file of rst-converters allow the build configuration to pass even if opencv header are not installed on the system,
To fix the sityuation, either :

• fix rst-converters-depends file to strip all opencv stuff (Recommended, less dependcencies. Do not forget to add OpenCV as binary deps of the debian packages)
  OR
• add find_package(OpenCV REQUIRED) in rst-convertersConfig.cmake

Johannes, what do you think?

I don't really understand the feedback and what is happening here. We only build the opencv-converters if opencv is generated and the depends file is generated by cmake. So I suspect a cmake bug.

With respect to grepping for opencv through the header files: With the generic converter interface of RSB it is quite likely that such a dependency is not visible in the header, as the converters do not have any specific data types in their interfaces.

I have no idea how to fix this.