Manal Helal wrote: > Thank you all for the replies, very appreciated, > > yes I did of course include -lm. I use other math functions and it is > alright, only long double functions are missing. So, are they not > included on cygwin entirely, or should I download a newer libc? I just > downloaded and installed from the nearest mirror thinking the latest > will come any way I'm guessing they're absent altogether, but this is no longer a gcc question, but one for Cygwin. Andrew.