clang packaging for debian

Mon Feb 4 23:54:54 GMT 2019

> On 4 Feb 2019, at 23:20, Sylvestre Ledru <sylvestre at debian.org> wrote:
> 
> Hello
> 
> Could you please provide a simple test case with the command line used?
> 
> And do you get an error ?
> 
> Thanks,
> 
> S
> 
> 
> 
Hello Sylvestre

Unfortunately thats not so easy as the stuff is done in ./configure tests.
Here is a text file where I compared the attmept to get gnustep-base compiled under debian9 (stretch). Something which used to work fine but now seems broken due to clang7 or due to clang8 (or due to libobjc2 or due to gnustep-make or gnustep-base)

So what I just did was install  a minimal VM with clang7 and another VM with clang8 and did the exact same steps on both machines to get a working gnustep base environment.
Both fail at the end but due to different reasons which seem to be related to clang / libobjc2 runtime interworking with each other somehow.

The result is however a test case which produces a linking error at the end which I think is the problem for clang7.
For clang8 it looks more like some internal libobjc2 initialisation [NSObject init] goes into a recursive exception.

If you want me to try something out, let me know. I can also give you access to the two tests sytems. I just set up to analyze this problem.

# clang-7 -v
clang version 7.0.1-svn348686-1~exp1~20190111074544.62 (branches/release_70)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.3.0
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0
Candidate multilib: .;@m64
Selected multilib: .;@m64

# clang-8 -v
clang version 8.0.0-svn352860-1~exp1~20190201121100.14 (branches/release_80)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.3.0
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
Andreas Fink
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> Le 04/02/2019 à 22:53, Andreas Fink a écrit :
>> Hello
>> 
>> I'm having issues with clang packages for debian stretch. I'm trying to compile gnustep and always run into compilation/linking issues. Accoding to David Chisnal they have been recently fixed in clang, however I can not seem to find any package which works. Neither clang-7 nor clang-8 are able to successful compile libobjc2 and gnustep-base.
>> 
>> Is it possible that I'm not getting the latest version from the repo or I'm looking at the wrong location?
>> 
>> 
>> I have  this in my Apt sources
>> 
>> 
>> deb http://apt.llvm.org/stretch/ <http://apt.llvm.org/stretch/> llvm-toolchain-stretch main
>> deb-src http://apt.llvm.org/stretch/ <http://apt.llvm.org/stretch/> llvm-toolchain-stretch main
>> # 7
>> deb http://apt.llvm.org/stretch/ <http://apt.llvm.org/stretch/> llvm-toolchain-stretch-7 main
>> deb-src http://apt.llvm.org/stretch/ <http://apt.llvm.org/stretch/> llvm-toolchain-stretch-7 main
>> # 8
>> deb http://apt.llvm.org/stretch/ <http://apt.llvm.org/stretch/> llvm-toolchain-stretch-8 main
>> deb-src http://apt.llvm.org/stretch/ <http://apt.llvm.org/stretch/> llvm-toolchain-stretch-8 main
>> 
>> 
>> and I have installed clang-7  or clang-8 and call the tools like this.
>> 
>> Compiling libobjc2 seems to work but when configuring gnustep-base, it barks saying I have an old runtime which doesnt support tons of things which clang all should ahve
>> 
>> one of them is
>> 
>> config/config.non-fragile-ivars.m
>> 
>> which tests
>> 
>> 	return __has_feature(objc_nonfragile_abi) ? 0 : 1;
>> 
>> 
>> which apparently returns 0. while I'm pretty sure this should be 1.
>> 
>> Also it claims there's no support for synchronisation or properties and the like.
>> 
>> 
>> I'm trying to get a recent version compiled since 3 weeks and seem not to have any combination of compiler/libraries/runtimes getting to work.
>> 
>> So any hint is welcome...
>> 
>> 
>> 
>> 
>> Andreas Fink
>> ------------------------------------------------------------------
>> Paradieshofstrasse 101, 4054 Basel, Switzerland
>> andreas at fink.org <mailto:andreas at fink.org> https://www.fink.org <https://www.fink.org/>
>> Mobile: +41-78-6677333 Office: +41-61-6666330 Home: +41-61-6666345
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>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
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