_Unwind_GetIPInfo changed the ABI for libgcc and it is hard to add it to the new libgcc for 10.4.
See http://gcc.gnu.org/ml/gcc-patches/2006-02/msg02041.html I am filing this so we keep track of this and this is a blocker for 4.2 for being released. -- Summary: [4.2 Regression] C++ is broken on *-*-darwin* Product: gcc Version: unknown Status: UNCONFIRMED Keywords: link-failure Severity: blocker Priority: P3 Component: target AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org GCC target triplet: *-*-darwin* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26792