Hi Mark!

> I tried dirty hack of patching meson.build of gtkmm, to refer to latest 

> versions of cairomm, atkmm, pangomm. Though, 'configure phase passes, 
> 'build phase fails with *numerous* errors.
> 
> If I de-propagate those inputs, packages that depends on gtkmm via 
> pkg-config, gonna barf "gtkmm not found".
> 
> Do you have any ideas?

Libsigc++, glibmm, cairomm, pangomm and atkmm; play well with each 
other's latest stable version. The gtkmm is the only outlier.

So I think we can either de-propagate inputs in gtkmm or use the patch 
as-is; and revert changes when new gtkmm version is released.

WDYT?

Regards,
RG.