building with libpd support

[porres]

Seems there are simple fixes/adjustments to be made so Prototype can be compiled with libpd support for VCV 2.0.

@clwe please let us know here when you get to this. I also hope you could help trying to compile this with some Pd externals (like ELSE/Cyclone).

[dizzisound]

Hi, just a quick report about my test-build. I managed to build VCV-Prototype enabling QuickJS, LuaJit and libPD under Windows 10. A summary of my main steps and edits:

• cloned the VCV-Prototype repo
• checked out the v2 branch
• fixed the line 507 in Prototype.cpp: https://github.com/VCVRack/VCV-Prototype/blob/739c0f5e90f3df8d7910b32fc0f58935f212d17d/src/Prototype.cpp#L507 with this line: std::wstring commandW = string::UTF8toUTF16(command); this fix was also suggested in this issue: https://github.com/VCVRack/VCV-Prototype/issues/63 but no pull-request followed the issue
• run the following command: pacman -S mingw-w64-x86_64-toolchain mingw-w64-x86_64-clang
• did the following in the VCV-Prototype Makefile
  1. enabled the LIBPD flag, i.e. LIBPD ?= 1
  2. in the # LibPD section of the Makefile, added the line: FLAGS += -DPDINSTANCE -DPDTHREADS
  3. in the $(libpd): target of the Makefile, changed the referenced commit to point at libpd 0.13.2: cd dep/libpd && git checkout e3980d2fe45ef9eaaec1d45e4d68637eaf76a8b1

I hope I didn't forget anything. I dropped the installable plugin on my Google drive: https://drive.google.com/drive/folders/1aW9TDz8VCEzb1VRvPtBPfqVH2Y76w09m?usp=sharing

[clwe]

I have been looking briefly into the libpd build yesterday. For Linux all that is needed is a different submodule checkout for libpd as suggested by @dizzisound. Thanks for finding that. The mentioned build flags are there already. I would need to look into windows and Mac builds soon.

[SteveRussell33]

* fixed the line 507 in `Prototype.cpp`:

https://github.com/VCVRack/VCV-Prototype/blob/739c0f5e90f3df8d7910b32fc0f58935f212d17d/src/Prototype.cpp#L507

  with this line:
  `std::wstring commandW = string::UTF8toUTF16(command); `
  this fix was also suggested in this issue:
  [QuickJS exclusive build #63](https://github.com/VCVRack/VCV-Prototype/issues/63)
  but no pull-request followed the issue

Fixed here 96d6305e89af82a39fb96578d2d25ac5d10f9ed1

[clwe]

This issue is fixed in v2-tmp branch and can be closed now. Superfluous build flags can be removed again via the pull request https://github.com/VCVRack/VCV-Prototype/pull/75