Re: libobjc2 on windows

[Vincent Richomme]

>> On 6 Mar 2010, at 13:57, Vincent Richomme wrote:
>> 
>>> So how can I tell GNUmakefile to use clang ? I also tried the
following
>>> line:
>>> 
>>> $> CC=clang CXX=clang++ OBJC=clang make messages=yes but same problem.
>> 
>> 
>> This is GNU Make, not BSD Make.  The correct syntax is:
>> 
>> $ make CC=clang
>> 
>> libobjc2 should compile with GCC, however...
>> 
> 
I have recompiled clang with specific include headers for GNustep :

InitHeaderSearch.cpp:
-----------------------

...
case llvm::Triple::MinGW64:
  case llvm::Triple::MinGW32:
    AddPath("c:/GNUstep/mingw/include", System, true, false, false);
    AddPath("c:/GNUstep/mingw/lib/gcc/mingw32/4.4.0/include", System,
true, false, false);
    AddPath("c:/GNUstep/mingw/lib/gcc/mingw32/4.4.0/include-fixed",
System, true, false, false);
    break;

and then tried to compile libobjc2 :

Global is marked as dllimport, but not external
%struct.objc_class* (i8*)** @_objc_lookup_class
Broken module found, compilation aborted!

you should add the following preprocessor directive to your makefile to
indicate
you are exporting symbols:

libobjc_CPPFLAGS += -DDLL_EXPORT ...

Once I made the change, compilation could progress a bit and now I have
the following error :

runtime.c:162:21: error: implicitly declaring C library function 'strdup'
with type 'char *(char const *)' [-pedantic]
  ivar->ivar_name = strdup(name);
                    ^
runtime.c:162:21: note: please include the header <string.h> or explicitly
provide a declaration for 'strdup'


Don't know how to fix that since string.h is included and do have a
declaration for strdup :

#ifndef _NO_OLDNAMES
/*
 * Non-underscored versions of non-ANSI functions. They live in
liboldnames.a
 * and provide a little extra portability. Also a few extra UNIX-isms like
 * strcasecmp.
 */
_CRTIMP void* __cdecl __MINGW_NOTHROW   memccpy (void*, const void*, int,
size_t);
_CRTIMP int __cdecl __MINGW_NOTHROW     memicmp (const void*, const void*,
size_t);
_CRTIMP char* __cdecl __MINGW_NOTHROW   strdup (const char*)
__MINGW_ATTRIB_MALLOC;
_CRTIMP int __cdecl __MINGW_NOTHROW     strcmpi (const char*, const char*);
_CRTIMP int __cdecl __MINGW_NOTHROW     stricmp (const char*, const char*);
int __cdecl __MINGW_NOTHROW strcasecmp (const char*, const char *);
...
#endif



If you really want to be pedantic, why don't you cast result from strdup
into const char*(type 
of ivar_name)

ivar->ivar_name = (const char *)strdup(name);


Anyway it doesn't solve clang error.