Re: Windows DLLs from Unix with minimum effort

[Erik de Castro Lopo]

Jason Curl wrote:

> Normally I write software for Posix like operating systems, but to assist 
> somebody I'm writing a Windows DLL that I'd like to later use the source for 
> in my Posix application without having to maintain two code bases.
> 
> I'm using 
>  ./configure CC="gcc -mno-cygwin" LDFLAGS="-Wl,--kill-at" 
> --target=i586-pc-mingw32 --disable-static
> on Cygwin to generate the Windows DLL
> 
> For each function I want to export I'm using:
>  #define LIBAPI __stdcall __declspec(dllexport)
>  LIBAPI type_t my_func(int param1, int param2);

Personally, I find that solution ugly.
 
> I'd like to use uncomplicated names so it can be used in VB6.0 for
> example, which is why I use LDFLAGS. I can probably use a DEF file,
> but I'm not clear how to implement libtool/automake/autoconf so that
> the DEF file is used only for Windows, or better yet, automatically
> generated.

Have a look at my project:

    http://www.mega-nerd.com/libsndfile/

which generates a .def file from a Python script which also generates
files for use with Linux and Mac OSX for use with the 
"-Wl,--exported_symbols_list" linker flags.

Part of the solution is in configure.ac and part in src/Makefile.am

Hope this helps,
Erik
-- 
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Erik de Castro Lopo
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"Microsoft's biggest weakness is that they still don't realize how
much they suck." -- Paul Graham