Implement suggestion by Adrian Johnson to comment out skia in configure.ac to avoid presenting it as an option to users. This was discussed on the Cairo mailing list in September 2017.
Skia is not API stable and is not available in packaged+versioned forms, resulting in it being a continually moving target. I.e. it's pretty much always unusably out of date. The last update to the skia backend was in 2014, and had not been updated very regularly prior to that.
We'll simply disable it for now. If no one complains by the next Cairo snapshot release, we'll assume no one is needing it and will drop the code entirely.
Meanwhile, if anyone does need it, it can be uncommented and used.
(The changes to the win32 build config appear to be automatically generated as a result of disabling the feature in configure. I'm committing them to avoid confusion.)
38806bc3c Disable skia from configure
boilerplate/Makefile.win32.features | 12 -----------
build/Makefile.win32.features | 1 -
build/Makefile.win32.features-h | 3 ---
build/configure.ac.features | 2 +-
configure.ac | 42 ++++++++++++++++++++-----------------
src/Makefile.win32.features | 16 --------------
6 files changed, 24 insertions(+), 52 deletions(-)