[collectd] compiling collectd 5.2 on hpux11.31(IA64)

[于明华^-^（奔）]

HI

I am compling collectd 5.2 on HP-UX 11.31(IA64) with gcc, and i'm getting the following errors:
	cc1: warnings being treated as errors
	email.c: In function 'open_connection':
	email.c:433: warning: implicit declaration of function 'getgrnam_r'
 
gcc is   gcc-4.2.3 
I just configure with no options and then a make. Any help would be appreciated. 

                                                                       Thaks!
-Ian