yes, just go with manually blacklisting compilers as required...

Might also be useful to submit a github issue against base, to discuss improving things there.

Chris

On 21/11/2019 1:30 pm, Renee Otten wrote:
Thank you Josh.

Unfortunately that doesn’t help as the same compilers are selected on OSX 10.8-10.10 and, therefore, the build still fails. It seems to me that base thinks that Clang 5 and above do support this () .So it makes sense that these compilers are used but it doesn’t seem to work. For now I think I’ll just switch the option off for older OS X versions or try to blacklist Clang < 7 and see it that helps.

Thanks,
Renee


On Nov 20, 2019, at 10:22 PM, Joshua Root <[email protected] <mailto:[email protected]>> wrote:

On 2019-11-21 13:38 , Renee Otten wrote:
dear all,


one of the PRs I just merged
(https://github.com/macports/macports-ports/pull/5848) fails on OS X
10.8, 10.9, and 10.10 with the error "error: thread-local storage is not
supported for the current target” (with AppleClang version 5.1, 6.0, and
7.0, respectively). On 10.7 it works
again because /opt/local/bin/clang++-mp-9.0 is used as compiler, I
assume because of the "compiler.cxx_standard 2011” statement.

Looking at other Portfiles there seem to be two approaches to resolve this:
1. if ${os.major} < 11, disable “thread_local” which is doable for the
port in question, but it will then also be disabled on 10.7 where is
seems to work now
2. blacklists compilers using "compiler.blacklist-append {clang < 700}”

Is there an opinion (or even consensus) about what is the preferred way
of doing this?

You are supposed to be able to set `compiler.thread_local_storage yes`
and have it Just Work, but I don't know how accurate base's idea of
which compilers versions can be used is.

- Josh

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