How to make fat binary on windows (WinAPI + LDC)

[Suliman]

     Retelling from the grid of my torments:
     Problem Summary:
     	1	ABI Incompatibility: LDC on Windows compiles D runtime 
only for MSVC ABI, while the GUI project uses MinGW GCC with a 
different ABI (different symbol naming and calling conventions).
     	2	D runtime not embedded: When building a static library via 
ldc2 -lib, D runtime symbols (_d_allocclass etc.) remain 
unresolved references, not included in the .lib file.
     	3	MinGW runtime doesn’t build: Attempt to rebuild D runtime 
for MinGW failed—LDC sources require patches for MinGW target 
support (error “Unsupported platform”).
     	4	Linking problem: MinGW linker (ld) cannot properly handle 
MSVC .lib files, and MSVC linker requires compiling C code with 
/TC flag, conflicting with existing code.
     	5	Fundamental limitation: On Windows, no simple way to 
statically link C code (MinGW) with D library (LDC/MSVC) due to 
different toolchains—must either build everything via MSVC or use 
DLL.

This is resume of my attempts to build. DLL works fine but I want 
fat binary