Add missing libpangocairo dependency

[jonashaag]

Without this, you'll get

OSError: cannot load library pangocairo-1.0: pangocairo-1.0: cannot open shared object file: No such file or directory.
Additionally, ctypes.util.find_library() did not manage to locate a library called 'pangocairo-1.0'

[liZe]

Thank you! PangoCairo seems to be provided by Pango with other distributions / OSes.

[geographika]

Just to note this is also the case on Windows for 0.41

OSError: cannot load library pangocairo-1.0: error 0x7e. Additionally, ctypes.util.find_library() did not manage to locate a library called 'pangocairo-1.0'

Is there an additional step to add to http://weasyprint.readthedocs.io/en/stable/install.html#windows ?

[liZe]

Is there an additional step to add to http://weasyprint.readthedocs.io/en/stable/install.html#windows ?

pangocairo is included in pango and supposed to be compiled when cairo is available. Both gtk2-runtime and gtk3-runtime have pango and cairo included, I don't see why they wouldn't include pangocairo. Could you check that it's included (or not) in your Gtk+ install?

[geographika]

@liZe - it does appear to be there - there is a libpangocairo-1.0-0.dll file in GTK3-Runtime Win64\bin
I'll do a few more tests to check it is not something in my environment. Rolling back to 0.4.0 does work though with the same GTK files.

[geographika]

@liZe - apologies. I ran through the installation on a clean Windows install and it works fine with 0.4.1, please ignore the above!