Table of Contents
- How do I get the current value of feature in Jamfile?
- I'm getting "Duplicate name of actual target" error. What does it mean?
- Accessing environment variables
- How to control properties order?
- How to control the library order on Unix?
- Can I get output of external program as a variable in a Jamfile?
- How to get the project root (a.k.a. Jamroot.jam) location?
- How to change compilation flags for one file?
- Why are the
dll-pathandhardcode-dll-pathsproperties useful? - Targets in site-config.jam
- Header-only libraries
This is not possible, since Jamfile does not have "current" value of any
feature, be it toolset, build variant or anything else. For a single invocation of
bjam, any given main target can be built with several property sets.
For example, user can request two build variants on the command line. Or one library
is built as shared when used from one application, and as static when used from another.
Obviously, Jamfile is read only once, so generally, there's no single value of a feature
you can access in Jamfile.
A feature has a specific value only when building a target, and there are two ways how you can use that value:
- Use conditional requirements or indirect conditional requirements. See the section called “Requirements”.
- Define a custom generator and a custom main target type. The custom generator can do arbitrary processing or properties. See the Chapter 6, Extender Manual.