[Bug libstdc++/11472] New: [3.4 regression] abs not found if <iostream> is included

["benko at sztaki dot hu" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11472

           Summary: [3.4 regression] abs not found if <iostream> is included
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: benko at sztaki dot hu
                CC: gcc-bugs at gcc dot gnu dot org

arta:~/c/proba$ cat abs.cc
#include <cmath>
#ifndef WORKAROUND
# include <iostream>
#endif /* WORKAROUND */


using std::abs;


double
f()
{
  return abs(-0.25);
}
arta:~/c/proba$ g++-cvs -v
Reading specs from /gml/shared/gcc-cvs/lib/gcc-lib/i686-pc-linux-gnu/3.4/specs
Configured with: ../gcc/configure --prefix=/gml/shared/gcc-cvs
--enable-languages=c++
Thread model: posix
gcc version 3.4 20030709 (experimental)
arta:~/c/proba$ g++-cvs -c abs.cc
abs.cc: In function `double f()':
abs.cc:13: error: call of overloaded `abs(double)' is ambiguous
/usr/include/stdlib.h:699: note: candidates are: int abs(int)
/gml/shared/gcc-cvs/include/c++/3.4/cstdlib:149: note:                 long 
   long int __gnu_cxx::abs(long long int)
zsh: exit 1     g++-cvs -c abs.cc
arta:~/c/proba$ g++-cvs -c -D WORKAROUND abs.cc
arta:~/c/proba$ 

(Of course not including <iostream> is a not too comfortable workaround.)