maintainer-feedback requested: [Bug 272173] graphics/opencv ATLAS knob cannot depend on cblas and cmake cannot find lapacke for this knob

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 24 Jun 2023 04:13:47 UTC
Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-desktop (Team)
<desktop@FreeBSD.org> for maintainer-feedback:
Bug 272173: graphics/opencv ATLAS knob cannot depend on cblas and cmake cannot
find lapacke for this knob
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272173



--- Description ---
maybe fallout from my 13.2 update that I lost track of, but I thought I had
this package while trying to get blender installed. Anyway, noticed cblas and
atlas-math cannot coexist, cblas says things are broken, they clobber. after
clearing this depend and checking the configure's output I noticed lapack
wasn't being found, actually lapacke, so had to force its path using a CMAKE_ON
with Atlas_CLAPACK_INCLUDE_DIR.

opencv now builds with the ATLAS blas option selected. 

Its possible openblas maybe has this issue? not sure, worth a quick check, but
I have no easy way to do that at the moment. it would def be using a different
cmake variable though. maybe the openblas cmake routines check
/usr/local/include/lapacke by default though too. the variable would seemingly
be OpenBLAS_INCLUDE_DIR based on the OpenCVFindLAPACK.cmake routines that don't
include the full path that was tripping up the Atlas routines in the same file.