* gcc.jam: Extend the 'toolset' feature with gcc here.
Use flags for linking too and eliminate 'link-options'
rule. Remove empty compile/archive/link/link-dll rules.
* toolset.jam (flags): Document somehow.
(set-target-variables): Call 'actualize' on values
of dependency features.
[SVN r16440]
* new/targets.jam: Check for duplicate 'basic-target::generate()' calls.
Use better logic to tell is source is another main target or file.
(project-target::has-main-target): New rule.
* new/project.jam (lookup): Fixes. (find-target): Implemented.
* new/make.jam: New file, defines the 'make' rule and associated target
class.
* new/build-system.jam: Import 'make'. Generate virtual targets and
actualize them.
* new/utility.jam: Added "MkDir" rule and actions.
* test/project_test3.py: New test.
[SVN r14249]
