[Bug libstdc++/11409] New: 26_numerics/fabs_inline.cc failure

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

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11409

           Summary: 26_numerics/fabs_inline.cc failure
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libstdc++
        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
 GCC build triplet: alpha-linux
  GCC host triplet: alpha-linux
GCC target triplet: alpha-linux

The test case fails with 

.../26_numerics/fabs_inline.cc: In function `int main()':
.../26_numerics/fabs_inline.cc:33: error: converting
   overloaded function `fabs' to type `double (*)(double)' is ambiguous
/usr/include/bits/mathinline.h:84: error: candidates are: double fabs(double)
<internal>:0: error:                 double std::fabs(double)

I believe it's not a c++ front end problem because the same .i file 
produces the same error when compiled with an i686-linux compiler.

That said, I can't figure out why this error occurs at all.  The test
case passes on i686-linux; both systems use glibc, and both systems
provide a version of fabs in /usr/include/bits/mathinline.h.

Can someone with more C++ Fu help me out?