[cairo] Making configure error message more clear

[Behdad Esfahbod]

On 03/26/2010 09:43 AM, Benjamin Otte wrote:

> I like the idea.
> And I remembered that pkg-config is a freedesktop project, so it made a
> lot of sense to fix this in pkg-config instead of doing custom hacks in
> configure files everywhere.
> The result is here:
> http://lists.freedesktop.org/archives/pkg-config/2010-March/000502.html

Sounds good.  Lets follow up there instead of cluttering our build infra.

b

> Benjamin
> 
>