Ok, Michael. I did it, but i think it isn't good.
[root@server files]# yum install g++
==============================================================
WARNING: Additional commands may be required after running yum
==============================================================
Loading "fastestmirror" plugin
Loading "smeserver" plugin
Setting up Install Process
Setting up repositories
smeaddons 100% |=========================| 951 B 00:00
updates 100% |=========================| 951 B 00:00
base 100% |=========================| 1.1 kB 00:00
smeos 100% |=========================| 951 B 00:00
smeupdates 100% |=========================| 951 B 00:00
Loading mirror speeds from cached hostfile
Reading repository metadata in from local files
Parsing package install arguments
No Match for argument: g++
Nothing to do
================================================================
No new rpms were installed. No additional commands are required.
================================================================
[root@server files]# make
gcc -Wall -D__KERNEL__ -DMODULE -I/lib/modules/2.6.9-42.0.3.ELsmp/build/include -I/usr/src/linux-2.6.9-42.0.3.ELsmp/drivers/usb/serial/ -O -c -o ftdi_sio.o ftdi_sio.c
make: gcc: Command not found
make: *** [ftdi_sio.o] Error 127