prevents complining the same source twice with the same properties.
Also allow generators to change source names using patterns.
* new/generators.jam (generator): Accept name patterns together with
target types.
(generator.generated-targets): Use name patterns. Transform generated
targets with 'virtual-targets.register', to eliminate duplicate
virtual targets.
[SVN r15302]
* new/sequence.jam (max-element): New rule.
(select-highest-ranked): New rule.
* new/numers.jam (__test__): Temporary disable all try/catch, since
errors.jam can't handle recursive try/catch yet, and loads
sequence, which in turns load numbers, in "catch" implementation.
[SVN r14922]
* new/targets.jam (make-target-alternative): New rule, which handles
applying project requirements and default build, when needed.
* new/make.jam (make): Use the above rule.
[SVN r14894]
* new/targets.jam: Use 'common' instead of 'utility'.
* test/project_test3.py: Test that 'clean' works.
* test/svn_tree.py: Sync with upstream revision 2944. Fix a bug
which caused empty directory to be treated as file.
[SVN r14886]
* new/modules.jam (import) Use the directory of the calling module
as additional search path element.
* examples-v2/make/project-root.jam: Remove workaround.
[SVN r14879]
* boost_build_v2.html: Extend feature description. Change wordings in
some places.
* new/feature.jam: Remove comments that are now in boost_build_v2.html.
[SVN r14782]
* new/targets.jam (main-target.generate) Add extra path component to
virtual target which free properties are not equal to project's.
(basic-target.generate): Pass refined properties to 'construct'.
(virtual-target.extra-path): New rule.
(virtual-target.actualize): Make use of extra path.
* new/property.jam (take-free): New rule.
[SVN r14396]
* new/target.jam (main-target.generate): Give a more detailed error
message when no alternative is found. (basic-target.generate):
Don't exit with error when requirements can't be satisfied. Just
return an error string.
[SVN r14393]
* new/targets.jam (main-target.generate): Select the alternative
based on the list of non-free requirements.
* new/property.jam (remove-free): New rule, removes free property from
a property set.
[SVN r14391]
* new/property.jam (make): New rule, constructs property set from
what the user gives. Handles implicit features.
* new/project.jam, new/targets.jam: Use 'property.make'.
[SVN r14370]
* new/project.jam (project-attributes): New class to keep all the
project related data. (attritutes, attribute): New rules to access
the project attributes. (target): New rule to access the project
target for a jamfile module.
(initialize): Store attribute in project-attributes instance.
(project): Moved to jamfile module.
(assign-option): Moved with modifications to project-attributes.get.
* new/targets.jam, new/project-root.jam, new/make.jam,
new/build-system.jam: Induced changes.
[SVN r14362]
* new/project.jam (lookup): Bugfixes. (find-target): Attempt to load
project specified by project id.
Project module rules:
project: Allow empty id.
use-project: New rule.
* new/targets.jam: (basic-target.generate-source): Correct a bug in
separating target id from extra properties.
[SVN r14341]
* new/os.path.jam (join-imp): Bugfixes. (all-parents): Simplified.
(glob-in-parents): New rule.
* new/project-root.jam (load): Use 'glob-in-parent' instread of
'find-to-root', so that "project-root.load ." always work.
* new/project.jam (find-jamfile): Make use of the 'glob-in-parents'
rule.
[SVN r14339]
* new/build-request.jam (expand-with-defaults): New rule
* new/build-system.jam, new/targets.jam: Use 'expand-with-defaults' instead
of 'expand'.
* new/builtin.jam: Define new feature 'threading'.
* test/project_test3.py: Test that feature defaults are applied.
[SVN r14307]
