llvm dev - May 2019 - Managing two versions of LLVM on the computer?

I wanted to try installing both LLVM 8 and 9 on the same machine and managing
them with a version control system, but is this possible?  And if so, would Git
be a good version control system to use?  How do LLVM developers use it for that
(if they do)?
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I haven't heard of anyone doing that - I'd personally build and install
them with different suffixes (so you'd have "clang-8" and
"clang-7" or the
like).

On Sat, May 18, 2019 at 5:23 PM Osman Zakir via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> I wanted to try installing both LLVM 8 and 9 on the same machine and
> managing them with a version control system, but is this possible?  And if
> so, would Git be a good version control system to use?  How do LLVM
> developers use it for that (if they do)?
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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Hi Osman,

Not sure if I understood correctly, what is the role of Git in this scenario?
For my use cases I just copy a number of precompiled versions[1] of LLVM and put
them under /opt/llvm/. Here is how it looks like on my machine:
> ls /opt/llvm/
3.8.0  3.9.0  4.0.0  5.0.0  6.0.0  7.0.0  8.0.0  monorepo

Then ,when I need to use a different version to compile something I usually
override compiler using environment variables, e.g.:
> export CC=/opt/llvm/3.9.0/bin/clang
> export CXX=/opt/llvm/3.9.0/bin/clang++
> cmake or whatever else is needed
I hope it helps.
> On 19. May 2019, at 02:23, Osman Zakir via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> I wanted to try installing both LLVM 8 and 9 on the same machine and
managing them with a version control system, but is this possible?  And if so,
would Git be a good version control system to use?  How do LLVM developers use
it for that (if they do)?
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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