[preprocessor] Appveyor weirdness

From: Edward Diener (eldiener_at_[hidden])
Date: 2020-09-14 04:28:51

In my appveyor.yml file for preprocessor one of the b2 command lines for 
a test run uses an explicit alias for the target. When run in 
appveyor.yml I get the messages:

notice: could not find main target preprocessor_limits
notice: assuming it is a name of file to create .

and

don't know how to make <e>preprocessor_limits

Yet when I run the same test locally using the preprocessor_limits 
target, everything works fine. Is Appveyor somehow different when 
running Boost Build tests than when I run it locally ?