Re: [Mingw-users] dll exports.

[Henrik S. <hst...@pr...>]

"Lloyd Dupont" <Llo...@wa...> wrote:

> maybe it's a stupid question but do you have tagged your function
> with tag such as (i don't have my resource here, so lot of syntax
> error) _declspec(dllimport) ?
>
> personally in my top level headr i have something like
>
> #ifdef WIN32
> #ifdef BUILD_DLL
> #define DLL_OBJECT _declspec(dllexport)
> #else
> #define DLL_OBJECT _declspec(dllimport)
> #endif
> #else
> #define DLL_OBJECT
> #endif
> and i tag all my function like this
>
> DLL_OBJECT void aUselessDLLFunction();
>
> or
> class DLL_OBJECT DLLCPPClass
> {
> };
>
> .......
> i hope the problem is here.....

i'm not sure if you understood my problem. the problem is that using dllwrap
and an export definition file you can put a pointer to an exported function
in a struct table, but when i drop the export definition file, that is no
longer allowed. gcc is telling me the function's addess is not constant.
sure, i can fix this by initializing the table run-time, but i would very
much like to know why using an export definition file just works...
currently the mingw specific header contains this. _AL_DLL beeing the export
'tag'.

---
#if (defined ALLEGRO_STATICLINK)
   #define _AL_DLL
#else
 #if (defined ALLEGRO_SRC)
    #define _AL_DLL   __declspec(dllexport)
 #else
      #define _AL_DLL   __declspec(dllimport)
 #endif
#endif

#define AL_VAR(type, name)                   extern _AL_DLL type name
#define AL_ARRAY(type, name)                 extern _AL_DLL type name[]
#define AL_FUNC(type, name, args)            type __cdecl name args
#define AL_METHOD(type, name, args)          type (*name) args
#define AL_FUNCPTR(type, name, args)         extern _AL_DLL type (*name)
args
---

-henrik