[portmidi] update to 235.1; add macOS and Linux support

[Be-ing]

PortMidi has been forked to https://github.com/mixxxdj/portmidi
and the build system rewritten with modern CMake so it works on
Windows, macOS, and Linux without requiring ugly hacks in the
portfile.cmake.

Describe the pull request

• What does your PR fix?

  Fixes portmidi port not building on macOS and Linux

• Which triplets are supported/not supported? Have you updated the CI baseline?

  all except UWP

• Does your PR follow the maintainer guide?

  yes

• If you have added/updated a port: Have you run ./vcpkg x-add-version --all and committed the result?

Yes

If you are still working on the PR, open it as a Draft: https://github.blog/2019-02-14-introducing-draft-pull-requests/

[NancyLi1013]

Hi @Be-ing

Thanks for your PR. Seems the fork https://github.com/mixxxdj/portmidi is owned by you. Vcpkg only supports official repo. So could you please revert the repo from SourceForge?

[Be-ing]

The SourceForge project has been abandoned for years. The last update to SVN was 2018-07-23.

[NancyLi1013]

The SourceForge project has been abandoned for years. The last update to SVN was 2018-07-23.

Thanks for your information. As I said above, vcpkg only supports official repo. The latest version 234 was updated 2020-08-04. And the maintainers are still working on this library. So we suggest to keep this repo.

[Be-ing]

Arch Linux and Alpine Linux packagers have expressed interest in updating their PortMidi packages with this fork. It's not the end of the world if you don't accept a fork of an unmaintained repository as legitimate because it's easy to keep this port in an overlay. However it would be inconvenient for other users if vcpkg fell behind and continued to not support macOS and Linux with this library whose whole purpose is to be cross platform. There may be new features added to this fork in the future and those surely won't be sent to SourceForge. I'm not going to learn to use SVN just to try to contribute to an unmaintained SourceForge project where it may very well be ignored indefinitely.

[NancyLi1013]

@vicroms

Could you please help take a look if we can accept the new repo https://github.com/mixxxdj/portmidi? Thanks.

[Be-ing]

I need to do more testing with this...

[JackBoosY]

Sorry but unless you are officially authorized to continue to maintain the port, we cannot accept this PR.