If set, this variable overrides the default system configuration directory
($PREFIX/etc). It's used to locate machine.config file.
.TP
+.I "MONO_COM"
+Sets the style of COM interop. If the value of this variable is "MS"
+Mono will use string marhsalling routines from the liboleaut32 for the
+BSTR type library, any other values will use the mono-builtin BSTR
+string marshalling.
+.TP
.I "MONO_CONFIG"
If set, this variable overrides the default runtime configuration file
($PREFIX/etc/mono/config). The --config command line options overrides the
makes it hard to isolate the root of certain problems.
.TP
.I "MONO_GENERIC_SHARING"
+This environment variable is completely unsupported, don't use it.
This controls for which classes to enable generic code sharing in
principle. Permissible values are "all", "corlib" and "none". The
default is "corlib", meaning that sharing can only happen for corlib