diy asks for Clang on 10.6.8 Rosetta

[barracuda156]

diy asks for Clang on 10.6.8 Rosetta, where Clang is unavailable (as on PPC generally):

macmini: svacchanda$ sudo port -v install diy
--->  Computing dependencies for diy......
The following dependencies will be installed: 
 clang-11
 clang_select
 libomp
 llvm-11
 mpich-clang11
Continue? [Y/n]: n

If diy is known not to work with GCC libgomp, it should be restricted to systems having Clang or otherwise to non-PPC archs. Otherwise, I guess, it should choose GCC and libgomp when cxx_stdlib eq "libstdc++".

[kencu (Ken)]

this is a header-only no arch port….

so must be the mpi PortGroup doing that… that does it’s own thing with compiler selection, and would need some kind of spaghetti coding to handle something like rosetta on 10.6…

[barracuda156]

Replying to kencu:

this is a header-only no arch port….

so must be the mpi PortGroup doing that… that does it’s own thing with compiler selection, and would need some kind of spaghetti coding to handle something like rosetta on 10.6…

Yes, I have seen it is header-only. I borrowed some fixes from this port to my submission: ​https://github.com/macports/macports-ports/pull/16536

It may make sense to add known_fail if it does not – for sure – work with GCC though. (No strong opinion here.) If no known_fail, then we want it not to call for Clang on anything PPC.

What would you recommend? Fixing mpi PG or adding a fix to the portfile?