DHCP 4.1.0 Solaris 9 compile errors

[Nicholas F Miller]

I am trying to compile DHCP 4.1.0 on a Solaris 9 machine and am having  
problems when I disable IPv6. If I use:

./configure --prefix=/usr/local/dhcp-4.1.0 --localstatedir=/usr/local/ 
dhcp-4.1.0/etc --disable-dhcpv6

I get these errors when I run make:

if gcc -DHAVE_CONFIG_H -I. -I. -I../includes  -DLOCALSTATEDIR='"/usr/ 
local/dhcp-4.1.0/etc"'   -g -O2 -D_XOPEN_SOURCE - 
D_XOPEN_SOURCE_EXTENDED=1 -D__EXTENSIONS__  -Wall -Werror -fno-strict- 
aliasing -MT dhcrelay.o -MD -MP -MF ".deps/dhcrelay.Tpo" -c -o  
dhcrelay.o dhcrelay.c; \
then mv -f ".deps/dhcrelay.Tpo" ".deps/dhcrelay.Po"; else rm -f ".deps/ 
dhcrelay.Tpo"; exit 1; fi
cc1: warnings being treated as errors
dhcrelay.c: In function 'main':
dhcrelay.c:165: warning: 'port_remote' may be used uninitialized in  
this function
dhcrelay.c:165: warning: 'port_local' may be used uninitialized in  
this function
dhcrelay.c:164: warning: 'service_remote' may be used uninitialized in  
this function
dhcrelay.c:164: warning: 'service_local' may be used uninitialized in  
this function
make[1]: *** [dhcrelay.o] Error 1

If I configure without disabling IPv6 then it compiles fine. WHY?
________________________________________________________
Nicholas Miller, ITS, University of Colorado at Boulder