On 2018-01-17, at 4:25 AM, David wrote:

> I’m using a version of Apple’s clang that doesn’t support thread local 
> storage (Apple LLVM version 7.0.2 (clang-700.1.81), from 2014). When I tried 
> to install lldb-6.0 it failed because that compiler didn’t support thread 
> local storage.
> 
> Is there a way to force the build for lldb-6.0 to use my installed clang 
> (/opt/local/bin/clang-mp-6.0)? /opt/local/bin/clang points at this version.
> My PATH is set to have /opt/local/bin prior to /usr/bin, so it wasn’t a PATH 
> issue.
> 
>       David
> 

To force a port to build with a compiler that it is not presently defaulting 
to, you do this, for example:

sudo port -v install lldb configure.compiler=macports-clang-6


There are values for configure.compiler in here:

<https://trac.macports.org/wiki/UsingTheRightCompiler>

You must realize that this is heading into "Advanced MacPorting" territory, you 
can break things, things may not work, etc, etc.

But that is what explorers yearn for ....


K

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