[MSVC][std:c++latest] EASTL failed to build with msvc due to error C2338 on Windows

[shizhuoer]

Hi all,
EASTL failed to build with msvc due to error C2338 on Windows. Could you please help look at this issue?

Environment:
Windows: windows server 2019
VS: 2019

Repro steps:
1.open VS2019 x64 tools command
2.git clone https://github.com/electronicarts/EASTL F:\gitP\electronicarts\EASTL
3.cd F:\gitP\electronicarts\EASTL
4.mkdir build_amd64 & cd build_amd64
5.set VSCMD_SKIP_SENDTELEMETRY=1 & "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Tools\VsDevCmd.bat" -host_arch=amd64 -arch=amd64 & set CL= /std:c++latest
6.cmake -G "Visual Studio 16 2019" -A x64 -DCMAKE_SYSTEM_VERSION=10.0.18362.0 -DEASTL_BUILD_TESTS:BOOL=ON -DEASTL_BUILD_BENCHMARK:BOOL=OFF .. 2>&1
7.set CL=%CL% /Zc:static_assert-
8.set CL=%CL% /Zc:char8_t-
9.msbuild /m /p:Platform=x64 /p:Configuration=Release EASTL.sln /t:Rebuild 2>&1

Error info:
F:\gitP\electronicarts\EASTL\test\source\TestStringView.cpp(12,15): error C2338: Building with char8_t tests e
nabled, but EA_CHAR8_UNIQUE evaluates to false. [F:\gitP\electronicarts\EASTL\build_amd64\test\EASTLTest.vcxproj]
F:\gitP\electronicarts\EASTL\test\source\TestString.cpp(17,15): error C2338: Building with char8_t tests enabl
ed, but EA_CHAR8_UNIQUE evaluates to false. [F:\gitP\electronicarts\EASTL\build_amd64\test\EASTLTest.vcxproj]

log
build.log