Log Message:
ccache: updated to 3.6

ccache 3.6

ccache now has an opt-in “depend mode”. When enabled, ccache never executes \ 
the preprocessor, which results in much lower cache miss overhead at the expense \ 
of a lower potential cache hit rate. The depend mode is only possible to use \ 
when the compiler option -MD or -MMD is used.

Added support for GCC’s -ffile-prefix-map option. The -fmacro-prefix-map \ 
option is now also skipped from the hash.

Added support for multiple -fsanitize-blacklist arguments.

ccache now includes the environment variables LANG, LC_ALL, LC_CTYPE and \ 
LC_MESSAGES in the hash since they may affect localization of compiler warning \ 
messages. Set sloppiness to locale to opt out of this.

Fixed a problem due to Clang overwriting the output file when compiling an \ 
assembler file.

Clarified the manual to explain the reasoning behind the “file_macro” \ 
sloppiness setting in a better way.

ccache now handles several levels of nonexistent directories when rewriting \ 
absolute paths to relative.

A new sloppiness setting clang_index_store makes ccache skip the Clang compiler \ 
option -index-store-path and its argument when computing the manifest hash. This \ 
is useful if you use Xcode, which uses an index store path derived from the \ 
local project path. Note that the index store won’t be updated correctly on \ 
cache hits if you enable this option.

Rename sloppiness no_system_headers to system_headers for consistency with other \ 
options. no_system_headers can still be used as an (undocumented) alias.

The GCC variables “DEPENDENCIES_OUTPUT” and “SUNPRO_DEPENDENCIES” are \ 
now supported correctly.

The algorithm that scans for __DATE_ and __TIME__ tokens in the hashed source \ 
code now doesn’t produce false positives for tokens where __DATE__ or __TIME__ \ 
is a substring.