Hi @Nicolas Micoud - the recommendation from @Heng Sin Lowhere is to add those libraries to the target platform instead of downloading to lib folder.
So, I think would be better to try that approach - I tried, but I was not able to follow the instructions from @Hiep Lq at the wiki - but I think we must try it again.
I'm revamping MTD plugin in order to remove all libraries and use trunk's instead.
This patch adds missing ones
Regards,
Nicolas