Testcase: extern int i; extern "C" int i; http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#563 is still active. We currently reject this on the 4.1 branch and the mainline but that is because of the patch for PR 27227.
-- Summary: [DR 563] linkage and variables Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28389