Re: libobjc2 build issue

[David Chisnall]

Hi,

I need to do a new release soon, as this was fixed in trunk ages ago…

If you run cmake with the -DLLVM_OPTS=off flag, then you should avoid this 
error.

David

> On 6 Oct 2017, at 16:36, Laurent Michel <address@hidden> wrote:
> 
> Dear All,
> 
> I just attempted to build the whole GNUstep suite with libobjc2 in a docker 
> container
> based on Ubuntu 16.04 and clang/llvm 3.8 n(also tried with 4.0 with the same 
> result)
> 
> I encounter the following issue when trying to build libobjc2. Namely, cmake 
> really
> does not like the AddLLVM directive it finds. This is with the git version of 
> libobjc2 and
> checking out the 1.8.1 tag. I googled and saw that this “kind” of issues
> has been ongoing for a while, but I couldn’t locate a clear-cut solution.
> 
> Note that this is not the first time I build GNUstep and didn’t have this 
> problem in the past.
> Does that mean that the Ubuntu version of clang is broken and the compiler 
> itself (+llvm) must 
> be build from source to get anywhere?
> 
> Many thanks for relevant pointers!
> 
> Best,
> —
> Laurent
> 
> PS/ Here is the complaint from cmake
> 
> export CC=clang-3.8;export CXX=
> clang++-3.8;cmake ..
> -- The C compiler identification is Clang 3.8.0
> -- The CXX compiler identification is Clang 3.8.0
> -- Check 
> for
>  working C compiler: /usr/bin/clang-3.8
> -- Check 
> for
>  working C compiler: /usr/bin/clang-3.8 -- works
> -- Detecting C compiler ABI info
> -- Detecting C compiler ABI info - 
> done
> 
> -- Detecting C compile features
> -- Detecting C compile features - 
> done
> 
> -- Check 
> for
>  working CXX compiler: /usr/bin/clang++-3.8
> -- Check 
> for
>  working CXX compiler: /usr/bin/clang++-3.8 -- works
> -- Detecting CXX compiler ABI info
> -- Detecting CXX compiler ABI info - 
> done
> 
> -- Detecting CXX compile features
> -- Detecting CXX compile features - 
> done
> 
> -- The ASM compiler identification is Clang
> -- Found assembler: /usr/bin/clang-3.8
> CMake Error at opts/CMakeLists.txt:4 
> (include)
> :
>   include could not find load file:
> 
>     AddLLVM
> 
> 
> CMake Error at opts/CMakeLists.txt:11 
> (add_llvm_loadable_module)
> :
>   Unknown CMake 
> command "add_llvm_loadable_module"
> .
> 
> 
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