Today I have encountered few problems while trying to compile PostgreSQL on Windows. PostgreSQL designed to work in *nix environments and it's native build system works flawlessly on Linux just as expected. Unfortunatelly on Windows this build system is used by minority of applications, partially using Microsoft's own version of make: nmake.
In PostgreSQL only libpq.dll can be compiled using nmake in Visual Studio Command Prompt which sets all necessary environment variables for compiler and linker (INCLUDE, LIBPATH etc, type
set in command prompt to verify these paths).