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README.md: add a note about ROS_OS_OVERRIDE 

meta-ros is supposed to be used for building a custom distribution
which isn't derived from any of the OSs known to the rospkg.os_detect
module.

Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com>
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Dmitry Rozhkov 2016-10-28 12:17:36 +03:00
parent 18a9288f44
commit 00a08815d3
1 changed files with 14 additions and 0 deletions
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@ -190,6 +190,20 @@ resolved in the past.
roscore
If you want to use the roswtf utility for diagnostics and experience an
exception like
rospkg.os_detect.OsNotDetected: Could not detect OS, tried ['windows', 'ubuntu', 'slackware', 'rhel', 'qnx', 'osx', 'opensuse', 'opensuse', 'mint', 'linaro', 'gentoo', 'funtoo', 'freebsd', 'fedora', 'elementary', 'debian', 'cygwin', 'centos', 'arch']
then you need to set `ROS_OS_OVERRIDE` to one of the listed OS names, e.g.
export ROS_OS_OVERRIDE=ubuntu
And since Yocto-based distributions are not supported by the `rospkg`
library you have to interpret roswtf's output by translating Ubuntu
package names manually to their corresponding package/recipe names that
were chosen in the meta-ros layer.
## CROSS-COMPILING ALL ROS PACKAGES IN meta-ros