devel/llvm*: Consistently use python:3.7+

llvm12 was inappropriately constrained to 3.6-3.9 breaking the ability
to set 3.10 as the default.  llvm11 just specified "python", but there's
no need to keep 2.7 support around.  The rest had obsolete 3.6+ entries.

No functional change: This is not expected to change the version of
python used.

PR:		270978
MFH:		2023Q2
Reported by:	michael.osipov@siemens.com
Sponsored by:	DARPA

devel/llvm15: Fix build with swig 4.1.1

PR:		270720

devel/llvm15: add a lite FLAVOR

The lite flavor is for when you just need a FreeBSD compiler (e.g., in
CI).  By default it includes CLANG and LLD as well as backends required
for FreeBSD and FreeBSD ports (BE_NATIVE, BE_AMDGPU, and BE_WASM).

The lite install is ~350GiB on amd64 vs ~1.7GiB for default and it has
only a single dependency (zstandard).  (The goal was no dependencies,
but libzstd is a private lib in base.)

Bump PORT_REVISION due to removal of clang libxml2 dependency.

Sponsored by:	DARPA

devel/llvm15: add a STATIC_LIBS option

When enabled (default) assorted LLVM componant static libraries are
included in the package.  Disabling this option reduces the installed
size by ~1GiB.

Sponsored by:	DARPA

devel/llvm15: enable ARM backend on aarch64

When BE_NATIVE is specified on aarch64, include the ARM (32-bit)
backend.

Sponsored by:	DARPA

devel/llvm15: disable FLANG option

The compiler produced doesn't work due to missing FreeBSD support added
after the release branch so disable it.  I've not completely disabled it
as I suspect it isn't hard to fix should someone want to do that rather
than moving to devel/llvm16.

By default this will also disable MLIR.

devel/llvm15: fix packaging with debug python

The actual suffix if python extensions (at least as built by the LLVM
infrastructure) is ${PYTHON_EXT_SUFFIX}${PYTHON_ABIVER} not merely the
former.

PR:		268437
Sponsored by:	DARPA

devel/llvm15: update to 15.0.7

Please see the release annoucment for changes:
  https://discourse.llvm.org/t/llvm-15-0-7-release

devel/llvm*: Fix CONFLICT on cmark

If the user has the textproc/cmark package installed, the py*-CommonMark
package will fail to install.  This in turn leads to build failures down
the line when sphinx tries to load commonmark.  The result is confusing
and potentially wastes a lot of build time so just conflict upfront.
The previous code attempted to do this, but I'd listed the conflict
incorrectly in 2019. :(

PR:		239636
Reported by:	Stephen Roznowski <sjrbulk@verizon.net>

devel/llvm15: add dependency on zstd

While here, slightly improve portlint compatability of MASTER_SITE.

PR:		268211
Reported by:	amdmi3

devel/llvm1[2345]: fix build with clang 15

When building llvm12 through llvm15 with clang 15 as host compiler, and
when compiler-rt is enabled, there will be errors due to float16
support, similar to:

    In file included from
/wrkdirs/usr/ports/devel/llvm15/work/llvm-project-15.0.6.src/compiler-rt/lib/builtins/extendhfsf2.c:11:
    In file included from
/wrkdirs/usr/ports/devel/llvm15/work/llvm-project-15.0.6.src/compiler-rt/lib/builtins/fp_extend_impl.inc:38:
   
/wrkdirs/usr/ports/devel/llvm15/work/llvm-project-15.0.6.src/compiler-rt/lib/builtins/fp_extend.h:44:9:
error: _Float16 is not supported on this target
    typedef _Float16 src_t;
            ^

This is because compiler-rt's CMake infrastructure detects float16
support at configure time, while targeting 'pure' x86_64, but then
builds parts of its tree also targeting i386.

devel/llvm15: Update to 15.0.6

See changes at: https://discourse.llvm.org/t/llvm-15-0-6-released

devel/llvm15: Update to 15.0.5

For a list of changes since 15.0.4, see
https://discourse.llvm.org/t/llvm-15-0-5-release

devel/llvm15: update to 15.0.4

See https://discourse.llvm.org/t/llvm-15-0-4-released for included
changes.

devel/llvm15: Update to 15.0.3

See the release annoucement for included changes:
https://discourse.llvm.org/t/llvm-15-0-3-released

This is expected to be the last point release of LLVM 15.

devel/llvm15: Update to 15.0.2 release

For a list of changes, see:
	https://discourse.llvm.org/t/llvm-15-0-2-tagged

MFH:		2022Q4

devel/llvm15: Fix plist without EXTRAS

With CLANG enabled and EXTRAS disabled, packaging would fail due some
clang-extras files being listed as clang files.

Reported by:	naddy

devel/llvm15: Update to 15.0.1

Of note: -Wimplicit-function-declaration and -Wimplicit-int have been
downgraded to warn by default rather than error to allow more time for
configure scripts to be updated to avoid spurious errors.  They are
expected to switch back to error in Clang 16.

For a complete list of changes see:
https://discourse.llvm.org/t/llvm-15-0-1-released/65380

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.

devel/llvm15: 15.0.0 Release

See the announcment and release notes for information on changes since
14.0.0: https://discourse.llvm.org/t/llvm-15-0-0-release/65099

devel/llvm15: update to RC3

Sponsored by:	DARPA, AFRL

devel/llvm15: Update to 15.0.0rc2

devel/llvm15: Add LLVM 15

Modify the llvm14-derived build for 15.0.0rc1, the first LLVM 15
release candidate.

Disble OPENMP by default on i386. It's clearly not being tested on
32-bit upstream.

Don't enable MLIR by default. Instead, rely on FLANG's dependency
on it to turn it on for architectures that support FLANG. This removes
MLIR from default packages on 32-bit system.

devel/llvm15: boostrap from devel/llvm14

Make an as-is copy of llvm14 as devel/llvm15. It will be updated to
LLVM 15 and connected to the build in the next commit.  This makes it
easier to see what has changed.