samba - Jul 1998 - building 1.9.18 for HPUX 10.20

I have sources for samba 1.9.18p8.

I'm trying to build the package on HPUX 10.20  

I beleive it cann't seem to find the varargs macros.  What linker
options / enviroment variables do I need to turn on?  I'm a little new
to HPUX. 

Thanks for your help.

HERE's my output from make.......

Using CFLAGS = -O -DSYSLOG -DSMBLOGFILE="/opt/utils/samba/var/log.smb"
-DNMBLOGFILE="/opt/utils/samba/var/log.nmb"
-DCONFIGFILE="/opt/utils/samba/lib/smb.conf"
-DLMHOSTSFILE="/opt/utils/samba/lib/lmhosts"
-DWEB_ROOT="/opt/utils/samba"
-DLOCKDIR="/opt/utils/samba/var/locks"
-DSMBRUN="/opt/utils/samba/bin/smbrun"
-DCODEPAGEDIR="/opt/utils/samba/lib/codepages"
-DWORKGROUP="LODGENET"
-DGUEST_ACCOUNT="nobody"
-DDRIVERFILE="/opt/utils/samba/lib/printers.def" -DHPUX -ansi
-D_HPUX_SOURCE -D_POSIX_SOURCE -DHPUX10 -DFAST_SHARE_MODES
-DSMB_PASSWD="/opt/utils/samba/bin/smbpasswd"
-DSMB_PASSWD_FILE="/opt/utils/samba/private/smbpasswd" 
Using LIBS =       
Compiling clientutil.c
Compiling clitar.c
Compiling getsmbpass.c
Compiling rpc_pipes/ntclientpipe.c
Compiling rpc_pipes/ntclientlsa.c
Compiling rpc_pipes/ntclientnet.c
Linking smbclient
ld: Unsatisfied symbols:
   __builtin_va_start (code)
*** Error exit code 1

Stop.