[Bug c++/21139] New: Improve handling of function-scope statics on platforms without weak symbols

[mmitchel at gcc dot gnu dot org]

On platforms without weak symbols, we presently emit statically initialized
function-scope static variables with internal linkage, even in functions with
vague linkage, and issue a warning indicating that, while the standard requires
that there be only one copy of the variable, there will in fact be multiple
copies in the user program.

In this thread:

http://gcc.gnu.org/ml/libstdc++/2005-04/msg00152.html

it was agreed that we should instead dynamically initialized all non-const
variables (thereby ensuring correct semantics), and continue to emit static
initializers only for const variables.  For const variables whose addresses are
not taken, we should not warn, as there is no way for the program to tell that
there are multiple copies of the variable.

-- 
           Summary: Improve handling of function-scope statics on platforms
                    without weak symbols
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mmitchel at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21139