How can I set a variable in Jamfile, that's value would depend on used feature ?
That is, I am using feature library:
import feature : feature ;
feature myoption : A B C : symmetric propagated ;
Now I want to set a global variable depending on value?
constant MY_VARIABLE : >>HERE VALUE DEPENDING ON <myoption> VALUE<< ;
How this can be done ?
In Boost.Build, the expression "<myoption> value" doesn't make much sense unless given a concrete target's context. Different concrete targets can be built with different values for <myoption> during the same build invocation. Those different concrete targets can even come from the same metatarget, yet still have different values for <myoption>. If you can provide an example of what you are trying to do, that includes targets and specifies how MY_CONSTANT is to be used for them, then perhaps I can come up with a solution.
Edit: Here is the relevant FAQ entry: How do I get the current value of feature in Jamfile?
