The license tags in manifest.xml and package.xml have been wrong. log4cpp does not explicitly allow later versions of the LGPL v2.1 in its original COPYING file.

Correction: In doc/html/index.html and on the web page the license text has the "or (at your option) any later version" extension.

And again ...

I think we should be consistent and write down what versions of things (e.g. operating system, ROS versions, catkin, compilers, etc.) that we support. Then the version of the XML format should be driven by that. At the moment it seems kind of scattershot ...

And again ...

I think we should be consistent and write down what versions of things (e.g. operating system, ROS versions, catkin, compilers, etc.) that we support. Then the version of the XML format should be driven by that. At the moment it seems kind of scattershot ...

See my response at orocos-toolchain/rtt#321 (comment):

• This patch does not change any dependency except for catkin_pkg if catkin is used as a build tool, which is considered safe for all relevant distributions since Ubuntu Trusty.
• The patch is required to build with ROS 2-related build tools.
• Requirements are documented at https://docs.orocos.org/docs_main/installation.html in the meantime.