samba - Sep 2003 - DG/UX compile error "Warning: invalid option '-O' ignored"

I am running DG/UX (version R4.20MU06) on a Pentium Pro Aviion
Trying to instal 2.2.8a
While running the make command I get the following:

root@darkstar# make
Using FLAGS =  -O  -I./popt -Iinclude -I./include -I./ubiqx
-I./smbwrapper  -DLO
/usr/local/samba/var"
-DCONFIGFILE="/usr/local/samba/lib/smb.conf"
-DLMHOSTSFILE
l/samba/lib/lmhosts"   -DSWATDIR="/usr/local/samba/swat"
-DSBINDIR="/usr/local/s
DLOCKDIR="/usr/local/samba/var/locks"
-DCODEPAGEDIR="/usr/local/samba/lib/codepa
ERFILE="/usr/local/samba/lib/printers.def"
-DBINDIR="/usr/local/samba/bin" -DPID
ocal/samba/var/locks" -DLIBDIR="/usr/local/samba/lib"
-DHAVE_INCLUDES_H
-DPASSWD
sbin/passwd"
-DSMB_PASSWD_FILE="/usr/local/samba/private/smbpasswd"
-DTDB_PASSWD
/local/samba/private/smbpasswd.tdb"
Using FLAGS32 =  -O  -I./popt -Iinclude -I./include -I./ubiqx
-I./smbwrapper  -D
="/usr/local/samba/var"
-DCONFIGFILE="/usr/local/samba/lib/smb.conf"
-DLMHOSTSFI
cal/samba/lib/lmhosts"   -DSWATDIR="/usr/local/samba/swat"
-DSBINDIR="/usr/local
 -DLOCKDIR="/usr/local/samba/var/locks"
-DCODEPAGEDIR="/usr/local/samba/lib/code
IVERFILE="/usr/local/samba/lib/printers.def"
-DBINDIR="/usr/local/samba/bin" -DP
/local/samba/var/locks" -DLIBDIR="/usr/local/samba/lib"
-DHAVE_INCLUDES_H -DPASS
"/sbin/passwd"
-DSMB_PASSWD_FILE="/usr/local/samba/private/smbpasswd"
-DTDB_PASS
sr/local/samba/private/smbpasswd.tdb"
Using LIBS = -lgen -lsocket -lnsl
Compiling smbd/mangle_hash.c
Warning: invalid option '-O' ignored
smbd/mangle_hash.c:467: syntax error before `int'
smbd/mangle_hash.c: In function `cache_mangled_name':
smbd/mangle_hash.c:592: warning: assignment from incompatible pointer
type
Fatal error in /lib/cc1
Child exit status 041
*** Error code 1

Stop.
root@darkstar#

In the previous step, during the configure, it clearly detects that the
-O option is accepted, so I am confused. 
(I can post the results of the configure if helpful)
I have installed the same version of samba successfully on Solaris8 and
AIX4.3 and cannot find any previous 
postings or help specific to this error.
Is there something specific to DG/UX I should be doing to the Makefile
after running the configure command?



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