[Bug libstdc++/107902] New: std::sort isn't usable on 16-bit targets

[Bug libstdc++/107902] New: std::sort isn't usable on 16-bit targets

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107902

            Bug ID: 107902
           Summary: std::sort isn't usable on 16-bit targets
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
  Target Milestone: ---

/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/bits/stl_algo.h:1948:42:
error: call of overloaded
'__lg(__gnu_cxx::__normal_iterator<std::chrono::time_zone*,
std::vector<std::chrono::time_zone> >::difference_type)' is ambiguous
 1948 |                                 std::__lg(__last - __first) * 2,
      |                                 ~~~~~~~~~^~~~~~~~~~~~~~~~~~
In file included from
/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/string:51,
                 from
/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/chrono:44:
/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/bits/stl_algobase.h:1509:3:
note: candidate: 'constexpr int std::__lg(int)'
 1509 |   __lg(int __n)
      |   ^~~~
/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/bits/stl_algobase.h:1513:3:
note: candidate: 'constexpr unsigned int std::__lg(unsigned int)'
 1513 |   __lg(unsigned __n)
      |   ^~~~
/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/bits/stl_algobase.h:1517:3:
note: candidate: 'constexpr long int std::__lg(long int)'
 1517 |   __lg(long __n)
      |   ^~~~
/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/bits/stl_algobase.h:1521:3:
note: candidate: 'constexpr long unsigned int std::__lg(long unsigned int)'
 1521 |   __lg(unsigned long __n)
      |   ^~~~
/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/bits/stl_algobase.h:1525:3:
note: candidate: 'constexpr long long int std::__lg(long long int)'
 1525 |   __lg(long long __n)
      |   ^~~~
/home/jwakely/src/gcc/build-16bit/msp430-elf/large/libstdc++-v3/include/bits/stl_algobase.h:1529:3:
note: candidate: 'constexpr long long unsigned int std::__lg(long long unsigned
int)'
 1529 |   __lg(unsigned long long __n)
      |   ^~~~


I think this is because ptrdiff_t is __int20 and there's no overload for that
type.