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Re: libobjc2 and powerpc.


From: Fred Kiefer
Subject: Re: libobjc2 and powerpc.
Date: Mon, 19 Mar 2018 23:06:31 +0100


> Am 19.03.2018 um 22:36 schrieb bertrand <address@hidden>:
> 
> 
> Hi everyone,
> I'm trying to build GNUstep with CLang, libdispatch and libobjc2 on a 
> fresh install of Debian Jessie on powerpc32 system. I'm trying on Jessie 
> because it's the last debian stable version for powerpc and I don't want to 
> switch 
> to debian unstable for now.
> 
> 
> I've installed the build dependencies, I've built cmake-3.7 from source, I 
> have cloned the current libobcj2 git repo and I'm now trying to build it.
> 
> libobjc2 fails to build with stock debian clang-3.5. 
> 
> It fails when building arc.m with the following :
> 
> 
> [ 71%] Building ASM object CMakeFiles/objc.dir/block_trampolines.S.o 
> /home/bertrand/Install_GNUstep/libobjc2/block_trampolines.S:136:2: warning: 
>       imp_implementationWithBlock() not implemented for your architecture 
>       [-W#warnings] 
> #warning imp_implementationWithBlock() not implemented for your architecture 
>  ^ 
> 1 warning generated. 
> [ 75%] Building ASM object CMakeFiles/objc.dir/objc_msgSend.S.o 
> /home/bertrand/Install_GNUstep/libobjc2/objc_msgSend.S:14:2: warning: 
>       objc_msgSend() not implemented for your architecture [-W#warnings] 
> #warning objc_msgSend() not implemented for your architecture 
>  ^ 
> 1 warning generated. 
> [ 78%] Building C object CMakeFiles/objc.dir/NSBlocks.m.o 
> [ 81%] Building C object CMakeFiles/objc.dir/Protocol2.m.o 
> [ 84%] Building C object CMakeFiles/objc.dir/arc.m.o 
> /tmp/arc-feaf47.s: Messages de l'assembleur: 
> /tmp/arc-feaf47.s:5157: Erreur: Nom de symbole manquant dans la directive 
> /tmp/arc-feaf47.s:5157: Erreur: type de symbole non reconnu « 
> .objc_sel_nameaddObject » 
> /tmp/arc-feaf47.s:5157: Erreur: rebut à la fin de la ligne, premier caractère 
> non reconnu est « : » 
> /tmp/arc-feaf47.s:5159: Erreur: Nom de symbole manquant dans la directive 
> /tmp/arc-feaf47.s:5159: Erreur: rebut à la fin de la ligne, premier caractère 
> non reconnu est « " » 
> /tmp/arc-feaf47.s:5160: Erreur: rebut à la fin de la ligne, premier caractère 
> non reconnu est « " » 
> /tmp/arc-feaf47.s:5162: Erreur: virgule attendue après le nom «  » dans la 
> directive .size 
> /tmp/arc-feaf47.s:5195: Erreur: « " »  inattendue dans l'expression 
> clang: error: assembler command failed with exit code 1 (use -v to see 
> invocation) 
> CMakeFiles/objc.dir/build.make:670: recipe for target 
> 'CMakeFiles/objc.dir/arc.m.o' failed 
> make[2]: *** [CMakeFiles/objc.dir/arc.m.o] Error 1 
> CMakeFiles/Makefile2:99: recipe for target 'CMakeFiles/objc.dir/all' failed 
> make[1]: *** [CMakeFiles/objc.dir/all] Error 2 
> Makefile:149: recipe for target 'all' failed 
> make: *** [all] Error 2 
> 
> Sorry for the french parts of the message, I don't know how to temporary 
> change my locale. 
> 
> I hope someone could help here : do I need a more recent clang than clang-3.5 
> to build the current libobjc2 ? Will libobjc2 ever build on ppc ?

No, a newer version of clang won’t help you here. As the message says libobjc2 
is not prepared to support powerpc. You will need somebody with assembler 
skills for this processor to write the small piece of code needed for message 
sends.

Maybe David is willing to help?


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