https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90707
Bug ID: 90707 Summary: GNU Objective C (C++) does not support nullability syntax. Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: objc Assignee: unassigned at gcc dot gnu.org Reporter: iains at gcc dot gnu.org Target Milestone: --- an addition to the language to try to improve the ability to diagnose programming errors involving NULL pointers. Headers using this for objective c cannot be consumed, since the syntax makes use of embedded keywords that cannot be "worked around" with preprocessor defines. more discussion on the motivations here: http://clang-developers.42468.n3.nabble.com/RFC-Nullability-qualifiers-td4044308.html