Re: [sigc] Compiling libsic++ as a DLL under Windows

[Martin Schulze <martin-ml hippogriff de>]

Hi Arnaud!

We would happily accept a patch against cvs. Please modify the affected  
header files to include sigc++config.h.
Don't forget that most header files get generated from .m4 files in the  
macros/ subdirectories; these are the files to modify.

sigc++config.h is also generated by the configure script, so please add  
the #defines in sigc++config.h.in. We already need a patch that  
provides (and makes the library use) a pregenerated sigc++config.h in  
the MSVC project directory. Maybe you can also include this in your  
patch.

Thanks!

 Martin


Am 28.07.2004 11:34:07 schrieb(en) Arnaud Debaene:
> I am trying to build a Win32 DLL from libsigc++ (see
> http://lists.gnome.org/archives/libsigc-list/2004-July/msg00027.html
> for
> another message on the subject).
>
>
>
> Among other things, I need to export some symbols from the DLL using
> the
> __declspec(dllexport) Microsoft stuff. I have therefore defined a
> SIC_API macro as suggested by James Lin.
>
>
>
> The macro is used on several places:
>
> connection.h :
>
>    l 39 : struct SIGC_API connection
>
>
>
> trackable.h :
>
>    l 35 : struct SIGC_API trackable_callback
>
>    l 49 : struct SIGC_API signal_base : public trackable
>
>    l 89 : struct SIGC_API trackable
>
>
>
> signal_base.h :
>
>    l 43 : struct SIGC_API signal_impl
>
>    l 139 : struct SIGC_API signal_exec
>
>    l 195 : struct SIGC_API signal_base : public trackable
>
>
>
> adaptors\lambda\select.h :
>
>    l 335 : SIGC_API extern const lambda<internal::lambda_select1> _1;
>
>              SIGC_API extern const lambda<internal::lambda_select2>
> _2;
>
>              SIGC_API extern const lambda<internal::lambda_select3>
> _3;
>
>              SIGC_API extern const lambda<internal::lambda_select4>
> _4;
>
>              SIGC_API extern const lambda<internal::lambda_select5>
> _5;
>
>              SIGC_API extern const lambda<internal::lambda_select6>
> _6;
>
>              SIGC_API extern const lambda<internal::lambda_select7>
> _7;
>
>
>
> Functors\slot_base.h :
>
>    l 52 : struct SIGC_API slot_rep : public trackable
>
>    l 123 : struct SIGC_API slot_do_bind
>
>    l 141 : struct SIGC_API slot_do_unbind
>
>    l 206 : class SIGC_API slot_base : public functor_base
>
>
>
> These are all the symbols I have identified that need to be exported
> from the DLL (basically, that is everything that is non template).
>
>
>
> Now, the definition of the SIGC_API macro should be (according to MS
> standard way of doing things):
>
>
>
> #ifndef SIGC_API
>
> #ifdef _MSC_VER    //Visual C++ only
>
> #ifdef SIGC_DLL_EXPORT
>
> #define SIGC_API __declspec(dllexport)
>
> #else
>
> #define SIGC_API __declspec(dllimport)
>
> #endif
>
> #else
>
> #define SIGC_API
>
> #endif
>
> #endif
>
>
>
> And SIGC_DLL_EXPORT should be defined in the Visual C++ project file
> used to build the DLL.
>
>
>
> My question is: *WHERE* do I put the SIGC_MACRO definition?
> sigc++_config.h sounds like a good candidate, but it isn't #included
> by
> all the headers where this macro is used. In fact there doesn't seems
> to
> be a common header included by everyone where I could put it.  In
> LibSigC++ 1.2, it was done in sigcconfig.h, but there does not seems
> to
> be an equivalent in version 2.
>
>
>
> Thanks for any idea.
>
>
>
> PS: Once this problem solved, I could post an updated version of the
> Visual C++ project, if it may help.
>
>
>
>
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