[cairo] compiler warnings in cairo_wideint.h/c

[Leon Woestenberg]

Hello all,

>But, according to C99, "const" is a "type qualifier" and as such
>specifies properties that are "meaningful only for expressions that are
>lvalues" §6.7.3 (3). Even more significant to the current code is:
>
>	"If the specification of a function type includes any type
>	 qualifiers, the behavior is undefined." §6.7.3 (8)
>  
>
To bring in some results from another tool set:


I was test driving the Cairo code on a Analog Devices DSP Blackfin DSP 
the last week, and
the compiler warned me the const type qualifier made no sense on a 
return value.

I also wondered what the const was doing there, but Keith's explanation 
about pure functions
would make sense.

That reminds me of checking the two other warnings I got throughout the 
code...

Regards, Leon.