Yup, that did it. I'm used to borland and ms c on dos and windows that seem to pull in these lib's automagicly. I KNEW there was a linker command to do this but couldn't find it. Where is this documented, and what other lib's do I need to look out for? Thanks for the help.
[EMAIL PROTECTED] wrote: > > > I got the following error with the attached program when attempting to > > compile with "gcc coil1.c". > > > > /tmp/ccc00256: In function `main': > > /tmp/ccc00256<.txt+0x92): undefined reference to `sqrt' > > > > > > I assume that this is a link error and that the required lib is not being > > included. What am I doing wrong? > > When including math.h, you need to use the "-lm" argument to gcc to tell it > to link to the math library. "gcc coil1.c -lm" should do the trick. > > Hope that helps, > > Alan > [EMAIL PROTECTED] > == Amateur Radio, when all else fails! http://www.qsl.net/wa2mze Debian Gnu Linux, Live Free or ..... _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com