Re: [Mingw-users] __imp... continued (2)

[<dan...@ya...>]

--- Lloyd Dupont <ll...@ga...> wrote: > (read "_imp... continued"
first. i write it at end of file in case)
> some test later it appear to me that dlltool when generating 
> .def file put line of style
> 	__objc_class_name_DLLToto @ 1 DATA ;
> 
> which cause dllwrap to produce output lib with __imp__XXX
> but that's all.
> 
> i remove DATA tag. built again, test. all work fine.
> even dependencies over multiple DLL (at least in my little 2 dll
> test)
> 
> what is the meaning of such DATA tag ?
> i think to write a script to remove them but...
> why generating them in this case ?
> 
> 
> ----- _imp... continued ----
> > 
> > ok, i understand some interesting thing with your explanation.
> > but the trouble is that it don't resolve my problems.
> > 
> > for example when i try "nm *.a | grep printf" in
> > gcc's lib dir i found.
> > 00000000 ? ___imp_printf
> > 00000000 ? __imp__printf
> > 00000000 T _printf
> > 
> > but when i build my .dll and .a file and want to link against i
> have an
> > error message:
> > LLToto.o(.text+0x70):LLToto.m: undefined reference to
> > `__objc_class_name_Object'
> > 
> > and when i run "nm libobjc.a | grep objc_class_name_Object"
> > (libobjc.a is my new lib) i get:
> > 00000000 ? ___imp___objc_class_name_Object
> > 00000000 ? __imp____objc_class_name_Object
> > 
> > so it appear to me that my lib lack something like:
> > (but my dll contain it)
> > 00000000 T __objc_class_name_Object
> > 
> > what can i do to have a correct .a file ?
> > (one who contain a ref to __objc_class_name_Object)
> 

Hello Lloyd

Have a look at following link for the meaning of the DATA tags and the
need to declare objects as declspec(__dllimport) in code that imports
extern data (of simple type like int as well user-defined objects like
your objc_class_name_Object)  from dll.

http://msdn.microsoft.com/library/techart/msdn_dllart.htmdata

Danny

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