[chimerax-users] Question about libLLVM

[Greg Couch]

For CentOS 8, there should be no difference between the ChimeraX 1.1 and 
ChimeraX 1.2 dependency on LLVM.  There is no direct dependency on 
LLVM.  The dependency comes from ChimeraX's dependency on CentOS 8's 
mesa-libOSMesa.  No version number is given for mesa-libOSMesa, so any 
version your system provides should work.  The version of LLVM needed by 
mesa-libOSMesa varies depending on which version of CentOS 8 you have 
installed.  On our CentOS 8 build VM, it happens to be LLVM version 10.  
On a CentOS Stream 8 machine I have access to, it is LLVM version 12.  
The CentOS 8 ChimeraX 1.2 rpm installs on both.

So I believe the problem is something to do with your particular setup.  
I hope I have given you enough clues to figure it out .

     -- Greg

On 7/5/2021 3:10 AM, Zhe Wang via ChimeraX-users wrote:
> Hi,
>
> We were trying to install ChimerX 1.2 on our Centos 8 system.
> It seems like ChimeraX 1.2 asks for libLLVM with version 10 which is 
> not a default package that built in the rpm. The default one for 
> CentOS 8 is version 9. Centos 7 does not provide and not available in 
> EPEL either. Could ChimeraX provide the corresponding library for 
> centos 8 and 7?
> Another question that I have is if the following is correct for 
> ChimeraX 1.1: ChimeraX 1.1 is using the default libLLVM3.9-mesa.so 
> <http://libLLVM3.9-mesa.so> for centos 8. And for centos 7, you have 
> ChimeraX 1,1 using the libOSMesa.so.8.0.0 which ChimeraX provided, as 
> I see ChimeraX 1.1 works fine one both, but not 1.2.
> Best,
> Zhe
>
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