math/Imath: ensure PYTHON build with /usr/bin/python[3] links

When /usr/bin/python[3] symlinks are present (which is nonstandard), the
FindPython logic inside cmake will grab it over $PREFIX/bin/python[3],
but still identify (by default) /usr/local/lib/... as the sitelib path,
but goof up when calculating the relative path in case of /usr/bin vs
/usr/local/bin mismatch.

Fix: Provide ${PYTHON_CMD} through the cmake Python_EXECUTABLE
variable to avoid any ambiguities and pin the right executable.

I believe it should be safe to NOT bump PORTREVISION,
but I will fetch far and err on the safe side and bump it, because that
is easier than researching all possible paths how and where
Python paths might find their way into the resulting package.

The detailed report by Seneca helped identify and solve this issue, so:
Thanks to:	Seneca Cunningham <seneca@vybenetworks.com>

PR:		263341
Reported by:	D'Arcy J.M. Cain <darcy@druid.net>
Reported by:	Seneca Cunningham <seneca@vybenetworks.com>
MFH:		2022Q3

math/Imath: bugfix/docfix update to v3.1.5

- [#244] Fix 32-bit x86 build failure with 16c instructions
- [#241] Move numeric_limits specializations into half.h
- [#236] Change references to "master" branch to "main"

Full Changelog:
https://github.com/AcademySoftwareFoundation/Imath/releases/tag/v3.1.5

MFH skipped, we are just two days before 2022Q2.

math/Imath: update to 3.1.4 (bug/doc fixes)

ChangeLog:
https://github.com/AcademySoftwareFoundation/Imath/releases/tag/v3.1.4

MFH:	2022Q1

math/Imath: update to Version 3.1.3

https://github.com/AcademySoftwareFoundation/Imath/releases/tag/v3.1.3

https://github.com/AcademySoftwareFoundation/Imath/blob/v3.1.3/CHANGES.md#version-313-september-2-2021

MFH:		2021Q3

math/Imath: v3.1.2 update improves *intrin.h use

Upstream change: Improve handling of #include <*intrin.h>

math/Imath: update to v3.1.1, waiving local patch

files/patch-eabc884d079d26afcead5128f7b093978d239ada.diff is no longer
needed - it is the sole change from v3.1.0 and I had previously cherry-
picked it from the upstream Git repo.

math/Imath: Update to v3.1.0

Changelog:
https://github.com/AcademySoftwareFoundation/Imath/releases/tag/v3.1.0

This will require some minor changes to ports that depend on it.

math/Imath: update to v3.0.5

Changelog:
https://github.com/AcademySoftwareFoundation/Imath/releases/tag/v3.0.5

math/Imath: update to v3.0.4

Release note:
"Patch release that corrects a problem with the release version number
of v3.0.2."
<https://github.com/AcademySoftwareFoundation/Imath/releases/tag/v3.0.4>

graphics/openexr: math/Imath: update to v3.0.3

Only upstream change is an install-fix that had previously been
cherry-picked by the FreeBSD port already.

Besides the version no., no impact on Imath or OpenEXR code, so
no PORTREVISION bumps of our users this time.

math/Imath: update to 3.0.2

removes patches cherry-picked from post-3.0.1 upstream

Changelog:	https://github.com/AcademySoftwareFoundation/Imath/releases/tag/v3.0.2

math/Imath: relax user to C++11, regression fix

Cherry-pick an upstream fix to relax users to C++11, only the
Imath code itself requires C++14.

Cherry-pick an upstream fix for a regression in succf()/predf().

While here, run tests in parallel and clean up for portclippy.

math/Imath: fix build with PYTHON option

- substitute Python version into pkg-plist
- depend on NumPy

Reported by:	olgeni@

math/Imath: new port (replaces graphics/ilmbase)

Patch series to update OpenEXR and ports that depend on ilmbase/OpenEXR
coming up.
---------------

Imath is a basic, light-weight, and efficient C++ representation of 2D and 3D
vectors and matrices and other simple but useful mathematical objects,
functions, and data types common in computer graphics applications, including
the "half" 16-bit floating-point type.

Imath also includes optional python bindings for all types and functions,
including optimized implementations of vector and matrix arrays.

Imath was originally developed at Industrial Light & Magic in the early 2000's
and was originally distributed as open source as a part of the OpenEXR project.

Imath continues to be maintained as a sub-project of OpenEXR, which is now a
project of the Academy Software Foundation. See the OpenEXR project's
GOVERNANCE.md for more information about how the project operates.

WWW: https://github.com/AcademySoftwareFoundation/Imath/