CTFE with C functions not possible?

[Shriramana Sharma via Digitalmars-d-learn]

Rikki Cattermole wrote:

> It will make it very hard to split std.math up.

I have no desire to split std.math up. :-)

What I desire to do is be able to call a C library from a D template like 
octal to compute a string at compile time.

Is this possible or not?

-- 
Shriramana Sharma, Penguin #395953