Compile errors when compiling imgui-1.91.5-docking on windows using clang++

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Compiling docking branch 1.91.5 on Windows, I got errors mainly from imgui using offsetof in static_asserts where first parameter is expected to be bool-constexpr. Since in Windows's clang offsetof uses reinterpret_cast, which is not constexpr expression.
This works in Linux, since it uses __builtin_offsetof, and MSVC seems to quietly pass it as well. Am I missing something from compile parameters or has this not been taken accounted for? I have included the compile errors in the txt file below.
Compile parameters
clang++ -std=c++2a -DIMGUI_IMPL_OPENGL_LOADER_CUSTOM -DIMGUI_DEFINE_MATH_OPERATORS -c imgui_draw.cpp -o imgui_draw.o

Compiler info

clang --version
clang version 19.1.3 (D:/a/llvm-project/llvm-project/clang ab51eccf88f5321e7c60591c5546b254b6afab99)
Target: x86_64-pc-windows-msvc
Thread model: posix

compile_errors.txt