Undefined ref. error crt1.o w/ nvidia nwbie please help

[shalperi]

Hello,

I am working my way through an OpenGl programming book doing some simple examples. I just got openGL working with the Nvidia drivers. I just ran into a new error.

/usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/…/…/…/crt1.0: in function ‘_start’:
undefined reference to ‘main’
collect2: ld returned 1 exit status

any ideas.

ALSO:
in general, how do you diagnose these types of undefined reference errors?

Thanks a lot,
Sam

[shalperi]

Nevermind, envoking the compiler with cc instead of gcc seems to solve the problem. Anyone have a reason why?

sh

[rts]

The real problem is that you forgot to link in a “main” function, either because you didn’t write one or you forget to include the object that contains “main” in your link.

On mandrake, cc is just a symlink to gcc, so you probably solved your problem by including the right objects the second time around.