as the first elements of result. Those usage requirements will be combined
with explicitly specified for the main target.
This is yet another step towards making 'main target classes' unnecessary.
* build/generators.jam
(try-one-generator): Check if generator returned usage requirements or not.
(construct): Make sure first element of result is always property set.
(many other methods): Induced changes
* tools/builtin.jam
(exe-target-class, lib-target-class): Remove.
(linking-generator, seached-lib-generator): Compute usage requirements.
(archiving-generator): New class
[SVN r26192]
virtual-target.jam.
- Added the missing explicit imports, now that we don't dump
everything into the global module with qualification
- stopped using the feature-space hack for temporary testing states of
the feature module. Instead we move its global variable definitions
to a temporary module.
- the way feature.action was invoking the rule it was being passed was
evil. Now you pass (even local) rules without qualification and
they are invoked in the source module context.
- module __test__ rules are always executed in a separate module, so
that their import dependencies can be separated from those of the
module being tested.
- better reporting of circular module-loading dependencies
implemented.
- minor changes:
property-set.jam: moved .empty initialization to avert circular
load dependency .
symlink.jam: fixed global variable naming.
[SVN r18407]
