[SBS] Updated cmake to test build a static library instead of an executable and build also if build system finds clang++

Alberto Nidasio authored 1 year ago and Davide Mor committed 1 year ago

This commit upgrades Miosix to version 2.7, and moves BSPs definitions
outside of the Miosix tree and into the Boardcore repository. Link
groups have also been fixed. Miosix Host and MxGui dependencies have
also been updated in order to support BSPs outside the kernel tree.

- CMake function 'sbs_target' now links to 'boardcore-host' when not
  cross-compiling
- CMake function 'sbs_catch_test' is added to register Catch2 test cases
  in CTest only when not cross-compiling

* Skyward Boardcore is now a library.

* CMake file 'boardcore.cmake' is added to define the library.

* Functions 'sbs_link_mxgui' and 'sbs_get_board' are no longer needed, as Skyward Build System targets are linked to Skyward Boardcore which in turn is linked to all libraries.

* CMake Tools settings for Ccache are added

* CMake Tools kit 'Miosix' that uses Toolchain File is added

* VSCode-specific fix in sbs.cmake is no longer needed

* File 'dependencies.cmake' is updated to configure and fully support Mxgui, Eigen, {fmt} and local libraries.

* Library {fmt} now works with every board, as it is no longer compiled with hardcoded flags.

* Function 'sbs_link_mxgui' is added, allowing to link Mxgui without respecifying the board.

* CMake file for SBS (sbs.cmake) contains function 'sbs_target', that allows to configure an SBS target (entrypoint or test).

* CMake file for dependencies (dependencies.cmake) contains definitions wrt. dependencies, including Skyward Boardcore sources (previously defined in sbs.conf).

* Find Module files allow CMake to find packages, including libraries (Eigen, {fmt}, Mxgui and TSCPP).

* At the moment, to make Find Module file for {fmt} work it is needed to run `make` in libs/fmt before configuring.

* Find Module file for Mxgui is not fully working yet.

* Skyward Build System v2.0 files are removed, as they are replaced by v3.0 files.