Updated devel/ccache 3.2.7 to 3.3
---------------------------------
ccache 3.3
----------
Release date: 2016-08-27

Notes
~~~~~
- A C99-compatible compiler is now required to build ccache.

New features and improvements
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- The configuration option `run_second_cpp` (`CCACHE_CPP2`) now defaults to
  true. This improves ccache's out-of-the-box experience for compilers that
  can't compile their own preprocessed output with the same outcome as if they
  compiled the real source code directly, e.g. newer versions of GCC and Clang.

- The configuration option `hash_dir` (`CCACHE_HASHDIR`) now defaults to true.

- Added a new `ignore_headers_in_manifest` configuration option, which
  specifies headers that should be ignored in the direct mode.

- Added a new `prefix_command_cpp` (`CCACHE_PREFIX_CPP`) configuration option,
  which specifies one or several prefixes to add to the command line ccache
  uses when invoking the preprocessor.

- Added a new `limit_multiple` (`CCACHE_LIMIT_MULTIPLE`) configuration option,
  which specifies how much of the cache to remove when cleaning.

- Added a new `keep_comments_cpp` (`CCACHE_COMMENTS`) configuration option,
  which tells ccache not to discard the comments before hashing preprocessor
  output. This can be used to check documentation with *-Wdocumentation*.

- Added a new sloppiness option `no_system_headers`, which tells ccache not to
  include system headers in manifest files.

- Added a new statistics counter that tracks the number of performed cleanups
  due to the cache size being over the limit. The value is shown in the output
  of ``ccache -s''.

- Added support for relocating debug info directory using `-fdebug-prefix-map`.
  This allows for cache hits even when `hash_dir` is used in combination with
  `base_dir`.

- Added a new ``cache hit rate'' field to the output of ``ccache -s''.

- Added support for caching compilation of assembler code produced by e.g.
  ``gcc -S file.c''.

- Added support for cuda including the -optf/--options-file option.

- Added support for Fortran 77.

- Added support for multiple `-arch` options to produce "fat binaries".

- Multiple identical `-arch` arguments are now handled without bailing.

- The concatenated form of some long compiler options is now recognized, for
  example when using `-isystemPATH` instead of `-isystem PATH`.

- If hard-linking is enabled and but fails (e.g. due to cross-device linking),
  ccache now falls back to copying instead of running the compiler.

- Made the `hash_dir` option only have effect when generating debug info.

- ccache now knows how to convert absolute paths to relative paths inside
  dependency files when using `base_dir`.

- Improved parsing of `-g*` options.

- Made ccache understand `-Wp,-D*` options.

- ccache now understands the undocumented `-coverage` (only one dash) GCC
  option.

- Names of included files are no longer included in the hash of the compiler's
  preprocessed output. This leads to more potential cache hits when not using
  the direct mode.

- Increased buffer size used when reading file data. This improves performance
  slightly.

Bug fixes
~~~~~~~~~
- Bail out on too hard compiler option `-P`.

- Fixed clang test suite when running on Linux.

- Fixed build and test for MinGW32 and Windows.


(mef)