Christos Zoulas wrote:

> Yes, clearly the long cast is not correct. There is a comment in libkern.h
> about ffs being part of gcc-3.0. What's the signature of that?

It seems that it's been a builtin for a while - egcs 1.1.2 and gcc
2.95.2 have it too.  The info page for egcs says:

     The `ffs' built-in function of C always uses the mode which
     corresponds to the C data type `int'.

I _think_ that means it operates on an int, and a comment in the gcc
source shows that:

	/* The ffs function operates on `int'.  */

Simon.
--
Simon Burge                            <simonb@wasabisystems.com>
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