libomp @13.0.0_1 fails to build on 10.6

[jmroot (Joshua Root)]

​https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/91774/steps/install-port/logs/stdio

Looks like the fix for #64549 caused it. This is a problem because the default compiler on 10.6 depends on libomp. It has to be built with clang-3.7 there because of that dependency.

[ryandesign (Ryan Carsten Schmidt)]

It fails because:

error: thread-local storage is not supported for the current target

The usual fix would be to add:

compiler.thread_local_storage yes

which would make MacPorts pick a newer compiler. Is that sufficient here or does that introduce a circular dependency?

[kencu (Ken)]

there is at present no easy way to get thread_local_storage with libc++ on 10.6 without manual intervention.

[ryandesign (Ryan Carsten Schmidt)]

Could we make the fix for #64549 only apply on 10.7 and later then?

[eborisch (Eric A. Borisch)]

Absolutely. I don’t have time today, but anyone should feel free to make the change. Sorry for the breakage!

[Eric A. Borisch <borisch.eric@…>]

In 43eecbac9d5ef0805f31855d15103f6055fb4508/macports-ports (master):

libomp: unbreak <= 10.6 (​https://github.com/macports/macports-ports/pull/13821)

Fixes #64558

[eborisch (Eric A. Borisch)]

Success: ​https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/91884