If easy means without referring to previously posted advice, probably not.
If the application requires .configure, there may well be specific platform dependencies where you would need Windows equivalents, and might want to incorporate those changes in the configure script. You might want to start by porting to Windows gcc/gfortran, before making the next move. But surely you knew that.
It may be relatively easy, at least in the case of 32-bit compilers, if you are willing to use gnu make with the standard changes to account for the differing compiler options.
If you accept gnu make, you must decide whether to standardize on renaming all .obj to .o, and (if 32-bit) possibly using gnu ar for static libraries, or adding the Windows extensions to .SUFFIXES and providing all corresponding rules.
