- update to 4.6.1:
* Added support for passing a directory to the MSVC `/Fo` option.
* Added knowledge about the `-imsvc` compiler option.
* Added knowledge about the `-z` linker option.
* Improved handling of `.gcno` files in combination with absolute input file
paths.
* Adapted to changes in GCC 9+ `.gcno` files, which contain the current working
directory, by including said directory in the hash. You can opt out of this by
enabling "`gcno_cwd sloppiness`".
* A preexisting object file is no longer considered when using
`-fsyntax-only`.
* Authenticate with Redis before database selection.
* Don't exit with an error on failure reading a cached file.
* Bail out on too hard MSVC environment variables `CL` and `+_CL_+`.
* Only use `/run/user//ccache-tmp` as the temporary directory if it's
writable.
* Fixed handling of the final newline in cached standard output from the
compiler.
* Fixed a bug related to distcc markers in standard error output.
* Paths to `base_dir` are now properly normalized on Windows.
* Fixed handling of MSVC `/Fp` and `/Yu` options with concatenated path.
* Fixed "`Multiple precompiled headers used`" error if MSVC `/Yu` option is used
after `/Fp`.
* Check for short reads when reading strings in result/manifest files.
* Log expanded secondary storage URL in put/remove.
* Fixed logging of statistics counters with value higher than one in debug log
and stats log.
* Avoid incorrect error log message for Redis write operations in `reshare`
mode.
* Support Redis URL without host (meaning localhost).