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From: "sir_nawaz959 at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/52688] New: static local variable can accessed from local class of function template
Date: Fri, 23 Mar 2012 17:20:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52688

             Bug #: 52688
           Summary: static local variable can accessed from local class of
                    function template
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: sir_nawaz959@yahoo.com


As per the C++ specification, static local variable can be accessed from local
class of function template, but GCC 4.6.1 gives error for the following
code-snippet:

template<typename T>
T f()
{
  static const double staticLocalVariable = 100.0;
  struct local
  {
      static double f() { return staticLocalVariable; }
  };
  return T(local::f());
}

int main() {
        std::cout << f<double>() << std::endl;
}

While gcc-4.5.1 compiles fine this code, gcc-4.6.1 gives error, saying:

undefined reference to `staticLocalVariable'