Add warning about non-virtual destructors to cpp compiler

Author: SolarLiner

meson.build

@@ -1,7 +1,7 @@
-project('libsass', 'c', 'cpp', version: '3.6.4', default_options: ['cpp_std=c++11'])
-
+project('libsass', 'c', 'cpp', version: '3.6.4', meson_version: '>=0.48', default_options: ['c_std=c11','cpp_std=c++11'])
+cpp = meson.get_compiler('cpp')
 if target_machine.system() == 'windows'
-  add_project_arguments('-D_WIN32', language: 'cpp')
+  add_project_arguments('-D_WIN32', cpp.get_supported_arguments('-Wno-non-virtual-dtor'), language: 'cpp')
 endif
 
 deps = [