[Bug libstdc++/87963] New: libstdc++-v3/src/c++17/memory_resource.cc:515:31: error: static assertion failed for mingw-w64 target since r265853

[mateuszb at poczta dot onet.pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87963

            Bug ID: 87963
           Summary: libstdc++-v3/src/c++17/memory_resource.cc:515:31:
                    error: static assertion failed for mingw-w64 target
                    since r265853
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mateuszb at poczta dot onet.pl
  Target Milestone: ---

When I build cross compiler (trunk) for mingw-w64 x86_64 target (long is
4-bytes, pointer is 8-bytes), there are errors since r265853

libtool: compile:  /home/ma/m/build/bc_gcc/./gcc/xgcc -shared-libgcc
-B/home/ma/m/build/bc_gcc/./gcc -nostdinc++
-L/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/src
-L/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/src/.libs
-L/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/libsupc++/.libs
-L/home/ma/m/cross/x86_64-w64-mingw32/lib -L/home/ma/m/cross/mingw/lib -isystem
/home/ma/m/cross/x86_64-w64-mingw32/include -isystem
/home/ma/m/cross/mingw/include -B/home/ma/m/cross/x86_64-w64-mingw32/bin/
-B/home/ma/m/cross/x86_64-w64-mingw32/lib/ -isystem
/home/ma/m/cross/x86_64-w64-mingw32/include -isystem
/home/ma/m/cross/x86_64-w64-mingw32/sys-include
-I/home/ma/m/source/gcc-9/libstdc++-v3/../libgcc
-I/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/include/x86_64-w64-mingw32
-I/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/include
-I/home/ma/m/source/gcc-9/libstdc++-v3/libsupc++ -std=gnu++17
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=memory_resource.lo -g -O2 -fimplicit-templates -c
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc -o
memory_resource.o
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc:515:31:
error: static assertion failed
  515 |   static_assert(sizeof(chunk) == (4 * sizeof(void*)), "");
      |                 ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc:526:48:
warning: left shift count >= width of type [-Wshift-count-overflow]
  526 |     static constexpr size_t all_ones = (1ul << _S_sizebits) - 1u;
      |                                                ^~~~~~~~~~~
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc:526:45:
error: right operand of shift expression '(1 << 58)' is >= than the precision
of the left operand [-fpermissive]
  526 |     static constexpr size_t all_ones = (1ul << _S_sizebits) - 1u;
      |                                        ~~~~~^~~~~~~~~~~~~~~
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc: In member
function 'std::size_t std::pmr::{anonymous}::big_block::size() const':
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc:548:5:
warning: control reaches end of non-void function [-Wreturn-type]
  548 |     }
      |     ^
Makefile:735: recipe for target 'memory_resource.lo' failed
make[4]: *** [memory_resource.lo] Error 1