bind 8.8.2 and solaris 7

[Syunya Yamanaka]

Hi all.
I'm trying to build laters bind under solaris 7 but still troubled.
I did following...

my system has gcc,binutils,flex,bison.
log on as none super user account
copy .tar.gz file to /opt/src/bind822 then run tar zxvf to .tar.gz file.
cd to /opt/src/bind822/src/port/solaris then vi Makefile.set then do
following
   delete "local" part from all DEST*= entrees(ie. /usr/bin instead of
/usr/local/bin)
   'AR=/opt/gnu/bin/ar cru'
   'YACC=/opt/gnu/bin/bison -d'
   'LEX=/opt/gnu/bin/flex'
   'RANLIB=/opt/gnu/bin/ranlib'
cd to /opt/src/bind822/src then run "make depend"
after that run "make all"

At this point,I got following error message.

gcc  -g -O2 -I../../port/solaris/include -I../../include -c noop.c
/opt/gnu/i386-pc-solaris2.7/bin/as: option `-s' is ambiguous
make[2]: *** [noop.o] Error 1
make[2]: Leaving directory `/opt/src/bind822/src/port/solaris'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/opt/src/bind822/src/port'
make: *** [all] Error 2

Anybody know what is "ambiguous" for me in this method?
(btw,it is strange that using /opt/gnu/i386-pc-solaris2.7/bin/as instead of
/opt/gnu/bin/ar but no idea...)

Thank you very much.