Oracle Install - Error /bin/sh: line 2: gcc: command not found / make: *** [ntcontab.o] Error 1

OS: Red Hat Enterprise Linux Server release 6.3Oracle DB: 10.2

I am getting this error while installing Oracle on the VMWare. I believe we are missing some packages but I was not able to find prerequisites to install oracle10.2 on Linux 6. please help.

**********  ERROR
INFO: Start output from spawned process:
INFO: ----------------------------------
INFO:

INFO: rm -f ntcontab.*

INFO: (if [ "compile" = "compile" ] ; then \
          /opt/app/oracle/product/10gR2/db_1/bin/gennttab > ntcontab.c ;\
          gcc  -c ntcontab.c ;\
          rm -f /opt/app/oracle/product/10gR2/db_1/lib/ntcontab.o ;\
          mv ntcontab.o /opt/app/oracle/product/10gR2/db_1/lib/ ;\
          /usr/bin/ar rv /opt/app/oracle/product/10gR2/db_1/lib/libn10.a /opt/app/oracle/product/10gR2/db_1/lib/ntcontab.o ; fi)