[Bug libstdc++/62118] New: cases under libstdc++-v3/testsuite/ext/ failed on aarch64/arm

["amker.cheng at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62118

            Bug ID: 62118
           Summary: cases under libstdc++-v3/testsuite/ext/ failed on
                    aarch64/arm
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: amker.cheng at gmail dot com

Hi,
Revision 213779 causes lots cases under libstdc++-v3/testsuite/ext/ failed on
aarch64-none-elf and arm-none-eabi.

The log message is like
In file included from
/home/binche01/work/oban-work/build-aarch64-none-elf/obj/gcc2/aarch64-none-elf/libstdc++-v3/include/ext/random:3494:0,
                 from
/home/binche01/work/oban-work/src/gcc/libstdc++-v3/testsuite/ext/random/arcsine_distribution/cons/default.cc:23:
/home/binche01/work/oban-work/src/gcc/libstdc++-v3/include/ext/random.tcc:
In member function
'__gnu_cxx::{anonymous}::uniform_on_sphere_helper<2ul,
_RealType>::result_type
__gnu_cxx::{anonymous}::uniform_on_sphere_helper<2ul,
_RealType>::operator()(_NormalDistribution&,
_UniformRandomNumberGenerator&)':
/home/binche01/work/oban-work/src/gcc/libstdc++-v3/include/ext/random.tcc:1609:18:
error: 'hypot' is not a member of 'std'
    auto __norm = std::hypot(__ret[0], __ret[1]);
                  ^
/home/binche01/work/oban-work/src/gcc/libstdc++-v3/include/ext/random.tcc:1609:18:
note: suggested alternative:
In file included from
/home/binche01/work/oban-work/build-aarch64-none-elf/obj/gcc2/aarch64-none-elf/libstdc++-v3/include/cmath:44:0,
                 from
/home/binche01/work/oban-work/build-aarch64-none-elf/obj/gcc2/aarch64-none-elf/libstdc++-v3/include/random:38,
                 from
/home/binche01/work/oban-work/build-aarch64-none-elf/obj/gcc2/aarch64-none-elf/libstdc++-v3/include/ext/random:38,
                 from
/home/binche01/work/oban-work/src/gcc/libstdc++-v3/testsuite/ext/random/arcsine_distribution/cons/default.cc:23:
/home/binche01/work/oban-work/target-aarch64-none-elf/aarch64-none-elf/include/math.h:306:15:
note:   'hypot'
 extern double hypot _PARAMS((double, double));
               ^

FAIL: ext/random/arcsine_distribution/cons/default.cc (test for excess errors)
Excess errors:
/home/binche01/work/oban-work/src/gcc/libstdc++-v3/include/ext/random.tcc:1609:18:
error: 'hypot' is not a member of 'std'