Compatibility with Ubuntu 18.04?

[Benjamin Gilbert]

On Tue, Jul 17, 2018 at 01:35:33PM +0000, Zarella,Mark wrote:
> Has anyone run into difficulty using Openslide with Ubuntu 18.04 LTS?  I
> upgraded from an earlier version, where openslide worked fine, and now
> it’s throwing an error from libcairo.  When I call from within Matlab:
> 
> Error using loadlibrary
> There was an error loading the library
> "/usr/lib/x86_64-linux-gnu/libopenslide.so.0"
> /usr/lib/x86_64-linux-gnu/libcairo.so.2: undefined symbol:
> FT_Get_Var_Design_Coordinates

Cairo is failing to resolve a symbol from FreeType.  It's likely that MATLAB
ships with a private copy of FreeType which doesn't contain that symbol.  If
the OpenSlide command-line tools run properly (e.g. 
openslide-quickhash1sum), the problem is not in OpenSlide.

--Benjamin Gilbert