On Wed, Jan 23, 2008 at 08:38:25PM +0800, pierric wrote:

I tried to compile it using gcc 4.2.2,but I failed with an linking greencard-nhc98, which has a few symbols cannot be found such as "isnormal","isfinite".

Your operaring system's libc probably doesn't support those functions. I've the same problem on OpenBSD. For a poor emulation of signbit(), isnormal() and isfinite(), you may substitute the following (for doubles): signbit(x) -> copysign(1, x) < 0 isnormal(x) -> x != 0 && !isinf(x) && !isnan(x) isfinite(x) -> !isinf(x) && !isnan(x) For the float equivalents, use copysignf(), isinff() and isnanf() instead. Ciao, Kili -- diffs are better if compilers see them first -- deraadt