Add a dependency for the VST3 SDK

README.md

@@ -22,6 +22,7 @@ imcomplete list of things that still have to be done before this can be used:
 - Mention that this update will break all existing symlinks and that the old
   `libyabridge.so` file should be removed when upgrading.
 - Update all the AUR packages.
+- Add CMake to the AUR package dependencies and to our Docker images
 
 ![yabridge screenshot](https://raw.githubusercontent.com/robbert-vdh/yabridge/master/screenshot.png)
 
@@ -44,6 +45,7 @@ imcomplete list of things that still have to be done before this can be used:
 - [Performance tuning](#performance-tuning)
 - [Runtime dependencies and known issues](#runtime-dependencies-and-known-issues)
 - [Building](#building)
+  - [Building without VST3 support](#building-without-vst3-support)
   - [32-bit bitbridge](#32-bit-bitbridge)
 - [Debugging](#debugging)
   - [Attaching a debugger](#attaching-a-debugger)
@@ -515,6 +517,7 @@ 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
 
@@ -545,6 +548,18 @@ 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