Add Windows support

[traversaro]

The packages in this repo compile shared libraries, but does not expose any symbol on Windows, so no library is actually generated on Windows.

On Linux and macOS, everything compiles fine as by default all the symbols are visible. We can achieve exactly the same behavior in Windows by setting to ON the CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS CMake variable, so this PR sets the CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS variable to ON, to ensure that the compilation works fine on Windows.

[ct2034]

Thanks for your contributions. This is very helpful! Unfortunately I don't have a lot of experience with windows myself. But do you have an idea how I could include ci jobs testing on windows?

[traversaro]

But do you have an idea how I could include ci jobs testing on windows?

I tried with official tooling in traversaro#1, but it is failing with the following message:

 CMake Error at CMakeLists.txt:14 (find_package):
    By not providing "Findament_cmake.cmake" in CMAKE_MODULE_PATH this project
    has asked CMake to find a package configuration file provided by
    "ament_cmake", but CMake did not find one.
  
    Could not find a package configuration file provided by "ament_cmake" with
    any of the following names:
  
      ament_cmakeConfig.cmake
      ament_cmake-config.cmake
  
    Add the installation prefix of "ament_cmake" to CMAKE_PREFIX_PATH or set
    "ament_cmake_DIR" to a directory containing one of the above files.  If
    "ament_cmake" provides a separate development package or SDK, be sure it
    has been installed.
  

However, I do not myself have a lot of experience with official ROS Windows binaries.

An alternative is to setup a job using robostack (https://robostack.github.io/index.html), in case you are interested you can find it in traversaro#2 . This second one is currently failing as ros-jazzy-launch-pytest is missing in ros jazzy, but I am adding it as part of RoboStack/ros-jazzy#16 .

[ct2034]

💚 All backports created successfully

Status	Branch	Result
✅	ros2-humble
✅	ros2-iron
✅	ros2-jazzy

Questions ?

Please refer to the Backport tool documentation