Bug#973290: ros-ros ftbfs in unstable with python3.9

[Matthias Klose]

Package: src:ros-ros
Version: 1.15.7-1
Severity: serious
Tags: sid bullseye ftbfs
User: debian-python at lists.debian.org
Usertags: python3.9

to reproduce, you can use the repositories found at:

deb [trusted=yes] http://people.debian.org/~doko/tmp/python3.9 ./
deb [trusted=yes] http://people.debian.org/~ginggs/python3.9-repo ./

https://people.debian.org/~ginggs/python3.9-default/ros-ros_1.15.7-1+build1_amd64-2020-10-27T13:10:57Z.build

[...]
make  -f core/roslib/CMakeFiles/roslib.dir/build.make
core/roslib/CMakeFiles/roslib.dir/build
make[3]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[3]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[3]: *** No rule to make target '/usr/lib/x86_64-linux-gnu/libpython3.8.so',
needed by 'devel/lib/x86_64-linux-gnu/libroslib.so.1.15.7'.  Stop.
make[3]: *** Waiting for unfinished jobs....


the cmake output looks like it's using just python3, but apparently that gets
translated to the wrong python3 version.