[Error] Undefined first referenced symbol in file

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I have a cpp in which i am using 2 classes from a hpp and defining the functions declared in the hpp. However when i compile the error comes :

g++ file.cpp
Undefined first referenced
symbol in file
main /auto/gnu/gcc/4.2.1/bin/../lib/gcc/sparc-sun-solaris2.10/4.2.1/crt1.o
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status

Posted 19-Sep-11 21:57pm

typedefcoder

Updated 28-Sep-11 21:01pm

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[no name] 29-Sep-11 4:14am

Is there some additional information here?

1 solution

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Richard MacCutchan · Accepted Answer · 2011-09-19T23:31:00

Solution 1

It would appear that module my570list.cpp does not contain a main() function as required for creating an executable from CPP source code. If you are merely trying to compile into object form then add the -c option to your compile command thus:

g++ -c my570list.cpp

Posted 19-Sep-11 23:31pm

Richard MacCutchan