How to obtain error log for gcc

[Sedat Sengul]

Hi;
I have Red Hat 6.2 dist. with kernel 2.2.14-5.0   
I tried to compile ethernet driver for 3com 3c90x.c file. I have a lot
of compile errors. How can I get the whole error log from gcc?

Note: compiling driver source is the only option for me, I guess,
because I could not find any related .o file with my kernel version.

Thanks