Re: Symbols not found?

[Kevin Ingwersen]

I couldnt sit still, and instead searched further. I ended up with the fact 
that I forgot to link the foundation framework, and managed to link in the 
libobjc I created. Now however, I have the problem that I am linked to 2 
libobjc’s - the one from apple and the one from GNUstep. So how do I prevent 
GCC from auto-linking against Apple’s runtime?

Some output:
Ingwie@Ingwies-Air ~/Work/objc $ /opt/GNUstep/bin/g++ -fnext-runtime test3.mm 
-framework Foundation
Ingwie@Ingwies-Air ~/Work/objc $ ./a.out 
objc[92056]: Class Object is implemented in both /usr/lib/libobjc.A.dylib and 
/opt/GNUstep/lib/libobjc.1.dylib. One of the two will be used. Which one is 
undefined.
objc[92056]: Class Protocol is implemented in both /usr/lib/libobjc.A.dylib and 
/opt/GNUstep/lib/libobjc.1.dylib. One of the two will be used. Which one is 
undefined.
Welcome to this ObjC++
ObjC call
C++ call

Ingwie@Ingwies-Air ~/Work/objc $ otool -L a.out 
a.out:
        /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation 
(compatibility version 300.0.0, current version 1056.0.0)
        libobjc.1.dylib (compatibility version 0.0.0, current version 1.7.2)
        /opt/GNUstep/lib/libstdc++.6.dylib (compatibility version 7.0.0, 
current version 7.18.0)
        /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current 
version 1197.1.1)
        /opt/GNUstep/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current 
version 1.0.0)
        /usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 
228.0.0)

Kind regards, Ingwie
Am 12.12.2013 um 19:15 schrieb Kevin Ingwersen <ingwie2000@googlemail.com>:

> Hey.
> 
> The GCC i compiled is 4.8.2, with ObjC support - and with that I compiled the 
> libobjc for gnustep form github. But that didn’t affect the GCC part afaik. 
> What does the switch "-fobjc-runtime=gnustep-1.7“ mean - and from where does 
> GCC know about gnustep-1.7?
> Im just curios, as I am no compiler junky ^^;
> 
> Kind regards,
> Ingwie
> Am 12.12.2013 um 14:52 schrieb David Chisnall <David.Chisnall@cl.cam.ac.uk>:
> 
>> Correct, this function is not defined by the GNUstep or GCC Objective-C ABI. 
>>  Try adding -fobjc-runtime=gnustep-1.7 to your OBJCFLAGS - on OS X the 
>> default is to use the macosx runtime ABI.
>> 
>> David
>> 
>> On 12 Dec 2013, at 03:27, Kevin Ingwersen <ingwie2000@googlemail.com> wrote:
>> 
>>> Hey!
>>> 
>>> After experimenting and researching the case of GNUstep on Mac, I have just 
>>> come along soemthing strange: _objc_msgSend_fixup is not defined in the 
>>> libobjc AND libobjc-gnu that I get while creating the gnustep libobjc and 
>>> the GCC with objc support.
>>> 
>>> I used the gnustep-libobjc from github, because that one worked for 
>>> compiling.
>>> 
>>> Kind regards, Ingwie
>>> _______________________________________________
>>> Discuss-gnustep mailing list
>>> Discuss-gnustep@gnu.org
>>> https://lists.gnu.org/mailman/listinfo/discuss-gnustep
>> 
>