Various restructure of test framework handling of paths to avoid duplicate path editing which caused failed tests. Adjust many tests to deal with added subdirectories in build outputs now that toolset requirements are active.
Related changes:
* BoostBuild.Tester & TestCmd.TestCmd interfaces now accept external process parameters as a list of strings, thus avoiding problems with parsing arguments containing spaces.
* Avoided a potential process hang in case an external process being run prints out enough output to fill up the OS's pipe buffer (OS would pause the process until someone read the data from the pipe but the testing framework would not do this until the process in question had terminated).
[SVN r79448]
to direct dependents. The previous behaviour can be confusing and
there are no use cases where the new behaviour will be bad.
It will add more include paths in some cases, but who cares?
[SVN r26528]
* new/targets.jam
(generate-dependencies): New argument 'extra-properties.
Add it to properties used for building dependencies.
(basic-target.generate): Use the above change.
[SVN r16611]
* new/targets.jam
(basic-target.generate): Use 'generate-dependencies'
for use requirements on this target.
* test/use_requirements.py: More tests.
[SVN r16580]
* new/virtual-target.jam
(virtual-target.use-requirements): New rule.
(virtual-target.set-use-requirements): New rule.
* new/generators.jam (construct): Use 'use-requirements' of sources.
* new/targets.jam (basic-target.generate): Store use requirements for
generated targets.
(main-target-alternative): Process use requirements.
* new/project.jam: Support 'use-requirements' project attribute.
[SVN r15821]
