[ros-users] hg_checkout.mk: change in patch behavior for Ele…

hi,

FYI, if you use mk/hg_checkout.mk to pull in 3rdparty code from a
Mercurial repo, then you should know that the patch behavior will
change in ROS Electric. Patches are now applied with `-p1` instead of
`-p0`, so that diffs generated by `hg diff` can be used directly,
without stripping the leading directory name. You will likely have to
regenerate or otherwise modify your existing patches against Mercurial
repos.

https://code.ros.org/trac/ros/ticket/3525#comment:2

    brian.