[Boost-build] Boost build tutorial and target-os

Subject: [Boost-build] Boost build tutorial and target-os
From: Edward Diener (eldiener_at_[hidden])
Date: 2015-09-24 20:29:07

In the Boost build tutorial these lines are given:

exe hello : hello.cpp ;
install install-bin : hello : <target-os>windows:<location>"C:/Program 
Files/hello" <target-os>linux:<location>/usr/local/bin ;

followed by the explanation:

The feature <target-os> is another feature with mutually exclusive 
values. It can be set for example to windows or linux but not to both.

This makes no sense since the example given is showing that the feature 
<target-os> is being used for 'windows' and 'linux'. The explanation is 
either that <target-os> is not a feature with mutually exclusive values 
or that the 3rd parameter to the 'install' rule specifies default 
values, but I have no idea from the tutorial which is the case.