sorayuki/implibGenerator

This tool is inspired by implib sdk project( http://implib.sourceforge.net ).

For "stdcall" convention exported from DLL file without decoration
(prefix, suffix, like _ and @4, @8, etc) like Windows APIs, it seems to be
 not easy to get an import library by yourself. The LIB.exe tool from VC can
 construct .lib from .def but it doesn't allow importing without decoration
and linking with decoration.

For example, I want to use Sleep function from kernel32.dll. I would like to
build an import library from a def file like this:

LIBRARY kernel32.dll
EXPORTS
    Sleep

and create it by

lib /def:k32.def /out:k32.lib

but when linking, it will say
error LNK2019: unresolved external symbol _Sleep@4 referenced
( use "cl test.c k32.lib /link /nodefaultlib" to have this test please. )

The linker looks for _Sleep@4 instead of Sleep.

But if the .lib is build from this:

LIBRARY kernel32.dll
EXPORTS
    Sleep@4

The build exe file won't run because there is no function named Sleep@4
in kernel32.dll.

So I need a .lib that imports Sleep from kernel32.dll and offers _Sleep@4
for linking.

ImpLib SDK project make use of fasm preprocess macros to construct a binary 
formed import library of DLL. It's very amazing.

After some trying, I found it has some limitation, like long DLL file name is
not supported, unicode function name is not supported, no x86-64 architecture
supported, etc.

But I have a lack of knowledge of fasm macro usage. To overcome these
limitation, I decided to write my own.

The structure of .obj file and .lib file is from Microsoft:
http://download.microsoft.com/download/e/b/a/eba1050f-a31d-436b-9281-92cdfeae4b45/pecoff.doc

No dependency library is required except standard c runtime and windows sdk.

LeiMing (sorayuki)
2016-01-27