Document YCMEPHelper module

[traversaro]

I think it should be sufficient to just pass the CONFIGURE_COMMAND (the one that usually is "cmake ..", BUILD_COMMAND (the one that usually is "cmake --build .") and INSTALL_COMMAND (the one that usually is cmake --build . --target INSTALL) in the call to ycm_ep_helper in the Build<package>.cmake script.

The YCMEPHelper module do not have a lot of docs, but it is just a small wrapper over the ExternalProject module, the documentation of which you can find in https://cmake.org/cmake/help/latest/module/ExternalProject.html . See the **_COMMAND documentation in that module to get more info.

[traversaro]

cc @gabrielenava

[gabrielenava]

Thanks, this Buildxxx.cmake file worked:

include(YCMEPHelper)

ycm_ep_helper(FEX-minimize TYPE GIT
              STYLE GITHUB
              REPOSITORY rodyo/FEX-minimize.git
              TAG master
              FOLDER external
              CONFIGURE_COMMAND ""
              BUILD_COMMAND ""
              INSTALL_COMMAND "")

[traversaro]

I renamed the issue as I think that this can be addressed by documenting a bit more the YCMEPHelper module, providing appropriate links to the ExternalProject docs.

[drdanz]

A lot of documentation related to the module is available here: http://robotology.github.io/ycm/gh-pages/git-master/manual/ycm-superbuild.7.html

ycm-superbuild(7) — YCM 0.9.1.1-20181128.5+giteae05dd Documentation