Missing symbol when loading on macOS 10.12.7

[danngreen]

From LarsBjerregaard on the VCV Rack community forum

https://github.com/4ms/4ms-vcv/releases/download/vcv-v0.20.1/4msCompany-2.0.0-mac-x64.vcvplugin

VCV Rack Pro 2.5.2 macOS x64
Standalone
Mac 10.12.7

[0.834 info src/plugin.cpp:265 extractPackages] Extracting package /Users/lab/Library/Application Support/Rack2/plugins-mac-x64/4msCompany-2.0.0-mac-x64.vcvplugin
[0.879 info src/plugin.cpp:167 loadPlugin] Loading plugin from /Users/lab/Library/Application Support/Rack2/plugins-mac-x64/4msCompany
[0.886 warn src/plugin.cpp:233 loadPlugin] Could not load plugin /Users/lab/Library/Application Support/Rack2/plugins-mac-x64/4msCompany: Failed to load library /Users/lab/Library/Application Support/Rack2/plugins-mac-x64/4msCompany/plugin.dylib: dlopen(/Users/lab/Library/Application Support/Rack2/plugins-mac-x64/4msCompany/plugin.dylib, 6): Symbol not found: __ZNSt19bad_optional_accessD1Ev
  Referenced from: /Users/lab/Library/Application Support/Rack2/plugins-mac-x64/4msCompany/plugin.dylib
  Expected in: /usr/lib/libc++.1.dylib
 in /Users/lab/Library/Application Support/Rack2/plugins-mac-x64/4msCompany/plugin.dylib

[falkTX]

According to https://github.com/4ms/4ms-vcv/blob/main/CMakeLists.txt#L2 the minimum supported version is 10.15

I was hoping to build this myself but the C++20 requirement is an issue, too new, doesn't work on slightly older systems.

[rubyglow]

According to https://github.com/4ms/4ms-vcv/blob/main/CMakeLists.txt#L2 the minimum supported version is 10.15

I was hoping to build this myself but the C++20 requirement is an issue, too new, doesn't work on slightly older systems.

I see that line, however on #6 Dann produced a build for macOS 10.13 using an unrelated change, so don't exactly know how that works.