graphics/py-open3d-python: Remove expired port:

2023-03-20 graphics/py-open3d-python: Broken since 2020

graphics/py-open3d-python: deprecate

Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

Drop python 2.7 support from a few ports

With hat:	portmgr

- Upgrade math/eigen3 to 3.3.8;

- Add some dependencies which might be detected by Find_Package but not
registered;

- Bump PORTREVISION of consumers.

PR:		250833
Submitted by:	/me
Approved by:	tcberner@ (KDE / maintainer) + exp-run

graphics/py-open3d-python: mark BROKEN on clang without experimental/optional

graphics/py-open3d-python: fix build on GCC architectures

Builds fine.

graphics/py-open3d-python: Fix path in the check of the header
<experimental/optiona>

graphics/py-open3d-python: Broken when the base C++ compiler is missing the
header <experimental/optional>

Reported by:	fallout

Bump PORTREVISION for ports depending on the canonical version of GCC
as defined in Mk/bsd.default-versions.mk which has moved from GCC 8.3
to GCC 9.1 under most circumstances now after revision 507371.

This includes ports
 - with USE_GCC=yes or USE_GCC=any,
 - with USES=fortran,
 - using Mk/bsd.octave.mk which in turn features USES=fortran, and
 - with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
   c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, everything INDEX-11 shows with a dependency on lang/gcc9 now.

PR:		238330

Related to revision 499061 bump ports with USES=fortran to have them
benefit from the improved situation where libgcc_s is only used when
absolutely necessary.

Suggested by:	tijl

Fix build on gcc-based architectures:

    Unsupported compiler -- pybind11 requires C++11 support!

Approved by:	portmgr (tier-2 blanket)

Update math/eigen3 to 3.3.7

- http://eigen.tuxfamily.org/index.php?title=ChangeLog#Eigen_3.3.6
- http://eigen.tuxfamily.org/index.php?title=ChangeLog#Eigen_3.3.7

Change cmake default behaviour to outsource.

Ports that build out of source now simply can use "USES=cmake"
instead of "USES=cmake:outsource". Ports that fail to build
out of source now need to specify "USES=cmake:insource".

I tried to only set insource where explictely needed.

PR:		232038
Exp-run by:	antoine

Bump PORTREVISION for ports depending on the canonical version of GCC
defined via Mk/bsd.default-versions.mk which has moved from GCC 7.4 t
GCC 8.2 under most circumstances.

This includes ports
 - with USE_GCC=yes or USE_GCC=any,
 - with USES=fortran,
 - using Mk/bsd.octave.mk which in turn features USES=fortran, and
 - with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
   c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, as a double check, everything INDEX-11 showed depending on lang/gcc7.

PR:		231590

graphics/py-open3d-python: Fix build failure on 12

12 has the failure:
/usr/local/bin/ld: /usr/bin/../lib/LLVMgold.so: error loading plugin: Cannot
open "/usr/bin/../lib/LLVMgold.so"
c++: error: linker command failed with exit code 1 (use -v to see invocation)
that is triggered by the -flto argument. It isn't supplied on 11.

Add patch that eliminates -flto altogether.

New port: graphics/py-open3d-python: Modern library for 3D data processing
(Python binding)