fontconfig commit db64c71408636e2d0ac3c39682ac1b6c8f317ac4

[Colin Walters <walters verbum org>]

http://cgit.freedesktop.org/fontconfig/commit/?id=db64c71408636e2d0ac3c39682ac1b6c8f317ac4
breaks gnome-continuous, which calls fc-cache unconditionally, even if the buildroot contains no fonts.

It's much more convenient to not have to carry the duplicative bits in most packaging systems that say "this 
package contains fonts, so run fc-cache".

Why did you make this change?  Can it be a new opt-in argument like "--error-if-empty"?

In the meantime,  I've tagged fontconfig:
https://git.gnome.org/browse/gnome-continuous/commit/?id=ad0b18f4d0ebc77b5d641f52b5e7231b544c1f39