Help with compiling and linking 4gl code

Hello, We are having a problem compiling a 4gl program to a UNIX binary. We are able to make a p-code runner and object code, however, when we link the object code we get a linker error that says that we have an undefined symbol in one of our object codes. I particular, we are doing a square root function is our C code that uses the sqrt function in math.h. math.h is included in our C code, we have tried hard coding the path as well as copying math.h to $INFORMIXDIR/incl. We are using Solaris 2.4 and SPARC Works 3.01 compiler. Any help would be greatly appreciated. Aaron Diehl, SOTAS, Inc