* Only pass clang-specific -stdlib= to the preprocessor.
* Improved handling of stale NFS handles.
* Made it harder to misinterpret documentation of boolean
environment settings' semantics.
* Corrected "Performance" section in the manual regarding __DATE_,
__TIME__ and __FILE__ macros.
* Don’t (try to) update manifest file in “read-only” and
“read-only direct” modes.
* Fixed a bug in caching of stat system calls in “file_stat_matches
sloppiness mode”.
* Fixed bug in hashing of clang plugins, leading to unnecessary
cache misses.
* Fixed --print-config to show “pch_defines sloppiness”.
OBS-URL: https://build.opensuse.org/package/show/devel:tools:building/ccache?expand=0&rev=43
