specify entry point function for winelib library in spec file

[Jia L Wu]

Hi,
During the winelib library building, I want to specify a function which
will be first called when DLL is loaded. From the winelib user's guide, I
saw there should be a line in spec file something like:
    init DllMain

But it seems that winebuild doesn't support this anymore. So how can i
specify an entry point function for a winelib library? Thanks.

Wu