Messages in this thread |  | | Date | Wed, 1 Nov 2000 10:22:16 -0800 | From | Richard Henderson <> | Subject | Re: 2.4.0-test10-pre6: Use of abs() |
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On Wed, Nov 01, 2000 at 09:46:19AM -0500, tytso@mit.edu wrote: > What versions of gcc produce the built-in functions?
2.95 and previous. In 2.96 somewhere we fixed a bug that automatically prototypes these builtin functions for you; ie with current code you get an undeclared function warning.
> And does it do so for *all* platforms? (i.e., PPC, Alpha, > IA64, etc., etc., etc.)
Yes. The thing about abs, though, is that it's "int abs(int)" which does naughty things with longs on 64-bit targets. You're much better off writing (x < 0 ? -x : x) directly.
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