[R-pkg-devel] flang doesn't support derived types

[Ivan Krylov]

Dear Othman El Hammouchi,

Welcome to R-package-devel!

В Wed, 08 May 2024 16:52:51 +0000
Othman El Hammouchi <othman.el.hammouchi using protonmail.com> пишет:

> However, upon submission I received an automatic reply shortly
> afterwards saying the build had failed on CRAN's servers for Debian.
> The log gives the following error:
> 
> flang/lib/Lower/CallInterface.cpp:949: not yet implemented: support
> for polymorphic types

Your use of contained procedures in class(t_mack_triangle) and
class(t_cl_res) signifies the derived types as being extensible and
thus potentially polymorphic. You'll have to replace class(...) with
type(...) and move the contained procedures out of the type definitions
(and maybe additionally make the types 'sequence' or 'bind(C)' to
signify them being non-extensible) to make the code work with flang-18.
I'm afraid this will also prevent you from defining destructors for
these types.

flang-new can be a very disappointing compiler at times [*], but it's
what people do use in the real world, especially for 64-bit ARM
processors, so in order to keep our packages portable, we have to cater
to its whims.

-- 
Best regards,
Ivan

[*] https://stat.ethz.ch/pipermail/r-package-devel/2023q4/009987.html