Don't use CMake for the VST3 SDK

This can't work yet.

CHANGELOG.md

@@ -29,9 +29,6 @@ Versioning](https://semver.org/spec/v2.0.0.html).
   be logged. This makes recognizing misbheaving plugins a bit easier.
 - Symbols in all `libyabridge.so` and all Winelib `.so` files are now hidden by
   default.
-- Building from source now requires CMake since this is required to build the
-  VST3 SDK. You can disable VST3 support to remove this requirement by setting
-  the `with-vst3` meson build option to `false`.
 
 ## [2.1.0] - 2020-11-20
 

README.md

@@ -517,7 +517,6 @@ the following dependencies:
 - A Wine installation with `winegcc` and the development headers. The latest
   commits contain a workaround for a winelib [compilation
   issue](https://bugs.winehq.org/show_bug.cgi?id=49138) with Wine 5.7+.
-- CMake for VST3 support[\*](#building-without-vst3-support)
 - Boost version 1.66 or higher[\*](#building-ubuntu-18.04)
 - libxcb
 
@@ -549,18 +548,6 @@ After you've finished building you can follow the instructions under the
   would need to be installed to compile on Ubuntu 18.04.
 </sup>
 
-### Building without VST3 support
-
-As mentioned above, building the VST3 SDK requires CMake. We might be able to
-easily replace the default build definitions for the SDK with a simple
-`meson.build` file in the future, but for now if you wish to build yabridge
-without VST3 support then you can disable it as follows:
-
-```shell
-# Disable VST3 support, removing the dependency on CMake
-meson configure build -Dwith-vst3=false
-```
-
 ### 32-bit bitbridge
 
 It is also possible to compile a host application for yabridge that's compatible

meson.build

@@ -70,21 +70,7 @@ tomlplusplus_dep = subproject('tomlplusplus', version : '2.1.0').get_variable('t
 wine_threads_dep = declare_dependency(link_args : '-lpthread')
 xcb_dep = dependency('xcb')
 if with_vst3
-  # TODO: Assert version '3.7.1', somehow
-
-  cmake = import('cmake')
-  vst3_sdk_options = cmake.subproject_options()
-  vst3_sdk_options.add_cmake_defines({
-    'SMTG_ADD_VST3_HOSTING_SAMPLES': 'OFF',
-    'SMTG_ADD_VST3_PLUGINS_SAMPLES': 'OFF',
-    'SMTG_ADD_VSTGUI': 'OFF',
-  })
-  vst3_sdk = cmake.subproject('vst3', options : vst3_sdk_options)
-  # TODO: This is not going to work due to
-  #       https://github.com/mesonbuild/meson/issues/8043
-  #       We'll have to replace this with a Meson subproject for the time being
-  #       and remove all references to cmake
-  # vst3_pluginterfaces_dep = vst3_sdk.dependency('pluginterfaces', native : true)
+  vst3_pluginterfaces_dep = subproject('vst3', version : '3.7.1').get_variable('pluginterfaces_dep')
 else
   message('VST3 support has been disabled')
 endif

meson_options.txt

@@ -12,6 +12,13 @@ option(
   description : 'Enable static linking for Boost. Needed when distributing the binaries to other systems.'
 )
 
+# NOTE: Right now this does not actually require CMake. Because of a limitation
+#       in Meson we can't use the original build definitions just yet. For the
+#       time being we have just written our own meson.build to replace the SDK's
+#       CMake project. Once Meson allows mixing native and cross compiled CMake
+#       subprojects the commit that added this notice can be reverted.
+#
+#       https://github.com/mesonbuild/meson/issues/8043
 option(
   'with-vst3',
   type : 'boolean',