Finding a mechanism plugin

[Rick van Rein <rick@xxxxxxxxxxxxxxx>]

Hello,

I am developing a plugin library that is built outside of the Cyrus SASL
package, so using its -dev but not its source.

To test from the build environment (as is typical under CMake) the
system-installed libsasl2.so needs to see my libhaan.so plugin library.
 Is that somehow supported, like with an envvar?

-Rick