[Bug 228007] math/lapack: switch to flang

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228007

robert.ayrapetyan at gmail.com changed:

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--- Comment #3 from robert.ayrapetyan at gmail.com ---
Created attachment 193117
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=193117&action=edit
poudriere log for a patched port

Hi, thanks for a prompt reply!

Globally defined: DEFAULT_VERSIONS+=    fortran=flang
will break all ports using gfortran-specific FFLAGS
(e.g.-ffixed-line-length-none) and not using flang's replacements (e.g.
-Mextend).
In case of a math/lapack there are also incompatibilities with e.g. ETIME
function: 
gfortran requires it to be INTERNAL (default make.inc), flang - EXTERNAL
(requires make.inc patch) etc.
A suggested patch makes math/lapack to build using flang on amd64 only and
passes all tests after that (see attached poudriere log).
Other platforms should be unaffected and will continue to use gfortran.
> devel/flang-clang has been marked broken
hm, thanks, I've missed that somehow... I've just commited a patch for it (see
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222254#c12).
gfortran's FreeBSD issue is really annoying and affects virtually all
scientific packages (e.g. Python's Keras, or recently added math/mlpack).
With FreeBSD's movement from gcc to clang, flang is the only right choice in a
long-term perspective.
To avoid even more issues and incompatibilities in the future I'm encouraging
FreeBSD's ports maintainers to make this switch ASAP.

Thanks!

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