[llvm-bugs] [Bug 33516] New: Build failure on ppc64: include/chrono:374:59: error: ‘(9.223372036854775807e+18 / 1.0e+9)’ is not a constant expression

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https://bugs.llvm.org/show_bug.cgi?id=33516

            Bug ID: 33516
           Summary: Build failure on ppc64: include/chrono:374:59: error:
                    ‘(9.223372036854775807e+18 / 1.0e+9)’ is not a
                    constant expression
           Product: libc++
           Version: 4.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: tstellar at gmail.com
                CC: llvm-bugs at lists.llvm.org, mclow.lists at gmail.com

libc++ build fails on ppc64 linux, with gcc (GCC) 6.3.1 20161221 (Red Hat
6.3.1-1)

llvm.src/projects/libcxx/include/chrono:413:67:   in constexpr expansion of
‘std::__1::chrono::__duration_cast<std::__1::chrono::duration<long long int,
std::__1::ratio<1l, 1000000000l> >, std::__1::chrono::duration<long double>,
std::__1::ratio<1l, 1000000000l>, true,
false>().std::__1::chrono::__duration_cast<_FromDuration, _ToDuration, _Period,
true, false>::operator()<std::__1::chrono::duration<long long int,
std::__1::ratio<1l, 1000000000l> >, std::__1::chrono::duration<long double>,
std::__1::ratio<1l, 1000000000l> >(__fd)’
/home/tmp.OkzzGfk9Zm/rc3/llvm.src/projects/libcxx/include/chrono:374:59: error:
‘(9.223372036854775807e+18 / 1.0e+9)’ is not a constant expression
                            static_cast<_Ct>(__fd.count()) /
static_cast<_Ct>(_Period::den)));
                           
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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