Compiler error problem

Dear team ,

My name is Aneesh from Kerala, India. I have using Domjudge server version 5.0.3 and its functioning very well also its deployed in Amazon web server, now my problem is some of the code is compilation is unsuccessful the description is

Compiling failed with exitcode 1, compiler output: collect2: error: ld returned 1 exit status

So please help me ....asap

Regards Aneesh