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Re: libobjc2 on windows


From: Vincent Richomme
Subject: Re: libobjc2 on windows
Date: Sat, 06 Mar 2010 14:43:08 +0100
User-agent: RoundCube Webmail/0.2

On Sat, 06 Mar 2010 14:29:14 +0100, Vincent Richomme
<address@hidden> wrote:
> Hi,
> 
> So I have installed last versions of GNUstep installers on windows and
> compiled clang.
> I have also checkouted libobjc2 and I entered:
> 
> CC=clang make
> 
> Making all in toydispatch...
> Making all for library toydispatch...
>  Compiling file toydispatch.c ...
>  Linking library toydispatch ...
> Creating library file: ./obj/libtoydispatch.dll.a
> Making all for library libobjc...
>  Compiling file class.c ...
> cc1.exe: warnings being treated as errors
> class.c:125: error: '_objc_lookup_class' redeclared without dllimport
> attribute:
>  previous dllimport ignored
> make[2]: *** [obj/class.c.o] Error 1
> make[1]: *** [internal-library-all_] Error 2
> make: *** [libobjc.all.library.variables] Error 2
> 
> 
> $ grep -Ri "objc_lookup_class" * (By the way grep inside your installer 
> grep is buggy because it's only a few kB while standard 
> one is at least 1MB, so I have replaced
> grep.exe, fgrep.exe and egrep.exe by last version from mingw 
> see grep-2.5.4-1-msys-1.0.11-bin.tar.lzma).
> 
> ...
> objc/objc-api.h:** This is a hook which is called by objc_lookup_class
and
> objc/objc-api.h:objc_EXPORT Class (*_objc_lookup_class)(const char
*name);
> objc/objc-api.h:Class objc_lookup_class(const char *name)
OBJC_DEPRECATED;
> 
> I tried to add the same export declaration but stil got errors.
> 
> Any idea ?
> 

Weird I have added __declspec(dllimport) and if I remove
initialization(=0), compilation
goes a bit further:

magic_objects.h:3: error: 'CONSTANT_STRING_CLASS' defined but not used
make[2]: *** [obj/class.c.o] Error 1
make[1]: *** [internal-library-all_] Error 2
make: *** [libobjc.all.library.variables] Error 2

It seems like clang doesn't take into consideration the __declspec
attribute
when there is an initializer.









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