stm8link is mostly licensed under GPLv2 (not "GPLv2 or later"). But part of it is under GPLv3. This is a major issue and needs to be fixed, as these two licenses are incompatible. My suggestion would be to change it to "GPLv2 or later".
The conflict is resolved by Hagen agreeing to the GPLv3->GPLv2+ change. While the parts that are GPLv2 are not yet changed to GPLv2+, the conflict is resolved.
stm8link is mostly licensed under GPLv2 (not "GPLv2 or later"). But part of it is under GPLv3. This is a major issue and needs to be fixed, as these two licenses are incompatible. My suggestion would be to change it to "GPLv2 or later".
Philipp