NIC driver install

OK Patrick I did like you said and entered tail rtl8139.c. It gave me some
compile commands and I tried them but all I get is "bash: gcc: command not
found". Am I supposed to be in a certain directory to access the gcc
command? How do I find what directory a file is in without going through
every directory? Just a note here FYI I am using Clarkconnect which is based
on the 7.2 version of Redhat, just in case it makes a difference.Thanks
again, Cliff