[Bug libgcc/58120] New: libgcc.a and libgcc_eh.a have incorrect symbol visibility

["jeremyhu at macports dot org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58120

            Bug ID: 58120
           Summary: libgcc.a and libgcc_eh.a have incorrect symbol
                    visibility
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jeremyhu at macports dot org

If one builds a dylib using static libgcc.a, the libgcc symbols will be
exported by that library.  One can mitigate this using an
-unexported_symbols_list, but that is sub-optimal.  The static archives should
have the expected visibility to prevent re-export when built into a dylib.

This is an issue on OS X, and I assume the same issue exists on other platforms
as well.