CentOS 5 Can't Install Portsentry

Just downloaded & tried to compile Portsentry (~~[http://sourceforge.net/project/showfiles.php?groupid=80573" target="blank">](http://sourceforge.net/project/showfile … p_id=80573">http://sourceforge.net/project/showfiles.php?group_id=80573](), but ran into a dead end. After figuring out that gcc wasn't installed, did a yum install gcc just fine. But make is still failing:

[root@----- portsentry_beta]# make linux                                                         
SYSTYPE=linux                                                                                       
Making                                                                                              
gcc  -O -Wall -DLINUX -DSUPPORT_STEALTH -o ./portsentry ./portsentry.c \                            
                ./portsentry_io.c ./portsentry_util.c                                               
./portsentry.c: In function â??PortSentryModeTCPâ??:                                                
./portsentry.c:1187: warning: pointer targets in passing argument 3 of â??acceptâ?? differ in signedness                                                                                                
./portsentry.c: In function â?? PortSentryModeUDPâ??:                                                
./portsentry.c:1384: warning: pointer targets in passing argument 6 of â??recvfromâ?? differ in signedness                                                                                        [root@----- portsentry_beta]#

Is this fatal, or can I press? Any suggestions?