[Bug libstdc++/24660] versioning weak symbols in libstdc++

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

------- Comment #7 from jason at gcc dot gnu dot org  2005-11-17 18:57 -------
Here's a reduced testcase:

namespace N { }
namespace std
{
  using namespace N __attribute__ ((strong));
}
namespace N
{
  using namespace std;
  template<typename T>
  struct A
  {
    void f();
  };
}
namespace std
{
  template<>
  struct A<int>
  {
    void f() { }
  };
}

This code, like the testcase for c++/16021, works fine if the implementation
namespace is nested within std.  I'm thinking of enforcing that requirement in
parse_using_directive; that would allow us to avoid adding more special lookup
rules.  Do you see any problem with that requirement?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24660