GPL with linking exception

[RomainBrault]

Before You Begin

Before proceeding, please make sure to follow these steps:

• [x] I have checked for similar questions in the project's issue tracker to avoid duplicates.
• [x] I have searched existing issues to see if this question has been asked before.

Your Question

Shouldn't GPL with linking exception be compatible with other open source licences?

See https://en.wikipedia.org/wiki/GPL_linking_exception

Example

I import pygit2 from an MIT licence project and it says it is incompatible. The author state the contrary (see https://github.com/libgit2/pygit2/issues/632). Wikipedia back this up.

I'm not a lawyer.