Manal Helal wrote: > > I am trying to compile some unix code on cygwin, using gcc version: > and I get these errors: > > ***************************************** > /home/user/proj/main.c:907: undefined reference to `_sqrtl' > /home/user/proj/main.c:1743: undefined reference to `_powl' > /home/user/proj/main.c:2006: undefined reference to `_ceill' > /home/user/proj/main.c:2035: undefined reference to `_floorl' > ***************************************** > > > > Can you please help me find what is missing? But you're not going to tell us the command line you used to link, right? Is it secret? I'm guessing you missed "-lm". Andrew.