- Imported frameworks have the FRAMEWORK property set
  - Added cmTarget::IsFrameworkOnApple method to simplify checks
  - Also remove separate IMPORTED_ENABLE_EXPORTS property and just use ENABLE_EXPORTS since, like FRAMEWORK, it just represents the target type.
  - Document FRAMEWORK keyword in INSTALL command.
  - Updated IMPORTED_LOCATION property documentation for Frameworks

COMP: Add virtual destructor to cmExportFileGenerator to avoid warnings about other virtual functions.

  - Created cmExportFileGenerator hierarchy to implement export file generation
  - Installed exports use per-config import files loaded by a central one.
  - Include soname of shared libraries in import information
  - Renamed PREFIX to NAMESPACE in INSTALL(EXPORT) and EXPORT() commands
  - Move addition of CMAKE_INSTALL_PREFIX to destinations to install generators
  - Import files compute the installation prefix relative to their location when loaded
  - Add mapping of importer configurations to importee configurations
  - Rename IMPORT targets to IMPORTED targets to distinguish from windows import libraries
  - Scope IMPORTED targets within directories to isolate them
  - Place all properties created by import files in the IMPORTED namespace
  - Document INSTALL(EXPORT) and EXPORT() commands.
  - Document IMPORTED signature of add_executable and add_library
  - Enable finding of imported targets in cmComputeLinkDepends

  - This will be useful for imported library dependencies
  - Replaces old cmTarget analyze-lib-depends stuff for linking
  - Formalizes graph construction and dump
  - Explicitly represents dependency inferral sets
  - Use BFS of initial dependencies to preserve order

ENH: Apply new implicit link directory find_library policy when loading a cache from an earlier CMake.

ENH: Added cmMakefile::NeedCacheCompatibility method and support for it in cmCacheManager.  This will allow commands to modify their behavior when running with a cache loaded from an earlier CMake version.

Alex

ENH: Remove sparcv9 architecture subdir added earlier.  The new implicit link directory policy takes care of the problem.

BUG: CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG should get its default value from CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG, not CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG.

ENH: Teach find_library to avoid returning library paths in system directories that may be converted to architecture-specific directories by the compiler when it invokes the linker.

  - Work-around bug in Watcom command line parsing for spaces in paths.
  - Add 'library' option before libraries specified by file path.

ENH: add return and break support to cmake, also change basic command invocation signature to be able to return extra informaiton via the cmExecutionStatus class

BUG: Be less aggressive about finding conflicts in the runtime path when the real soname is not known.