It was incorrect because it was following symlinks. That means that a
build system wouldn't detect is a symlink changed. It's probably best
not to do any normalization at all and leave it to the build system.
I think that the dependencies should just be files that were loaded, so
I changed it to do that, but added an extra (hidden for now) option to
list all paths that were checked, staring with a `+` for files that are
present, and `-` for files that are absent.
Also fixed a bug with the path resolver.
[SVN r77973]
- Include relevant locations on path where file wasn't found.
- Improve `include_search` while I'm at it.
- Normalize paths for non-existent files.
- Tests, not integrated with Boost.Build yet. Needs to check that
python is available then run the script with the location of the
quickbook executable.
[SVN r77598]
