[Bug c++/18838] New: overload resolution depends on previous uses of the symbol

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

The following is a reduced form of 26_numerics/cmath/fabs_inline.cc
which has failed for a very long time on Alpha, but doesn't fail on
other platforms and so isn't getting fixed.

The problem is that Alpha's headers have an inline version of floor
which uses fabs.  This usage isn't present on other systems.  Which
leads to the following reduced test case

--------------------------------------------------------
extern "C" {
  extern double fabs (double __x) throw () __attribute__ ((__const__));

  __inline double
  fabs (double __x) throw () { return __builtin_fabs (__x); }
}

double fail_me(double __x) { return fabs(__x); }

namespace std
{
  using ::fabs;
}

typedef double (*realfn) (double);

using std::fabs;

int main ()
{
  realfn myfn = fabs;
}
--------------------------------------------------------

which will pass if fail_me is commented out.

-- 
           Summary: overload resolution depends on previous uses of the
                    symbol
           Product: gcc
           Version: 3.3.5
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rth at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18838