How to tell the compiler NOT to assume cpu provides atomic instructions

Hello All,

I'm trying to compile the latest Asterisk release 1.8.3 on a V240 Sparc running Debian Squeeze. However, during make, it crashes with the following:

Generating embedded module rules ...

[LD] abstract_jb.o acl.o alaw.o aoc.o app.o ast_expr2.o ast_expr2f.o asterisk.o astfd.o astmm.o astobj2.o audiohook.o autochan.o autoservice.o bridging.o callerid.o ccss.o cdr.o cel.o channel.o chanvars.o cli.o config.o data.o datastore.o db.o devicestate.o dial.o dns.o dnsmgr.o dsp.o enum.o event.o features.o file.o fixedjitterbuf.o frame.o framehook.o fskmodem.o global_datastores.o hashtab.o heap.o http.o image.o indications.o io.o jitterbuf.o loader.o lock.o logger.o manager.o md5.o netsock.o netsock2.o pbx.o plc.o poll.o privacy.o rtp_engine.o say.o sched.o security_events.o sha1.o slinfactory.o srv.o ssl.o stdtime/localtime.o strcompat.o strings.o stun.o syslog.o taskprocessor.o tcptls.o tdd.o term.o test.o threadstorage.o timing.o translate.o udptl.o ulaw.o utils.o version.o xml.o xmldoc.o editline/libedit.a db1-ast/libdb1.a -> asterisk

astobj2.o: In function `ast_atomic_fetchadd_int':

/usr/src/asterisk-1.8.3/include/asterisk/lock.h:589: undefined reference to `__sync_fetch_and_add_4'

astobj2.o:/usr/src/asterisk-1.8.3/include/asterisk/lock.h:589: more undefined references to `__sync_fetch_and_add_4' follow

utils.o: In function `ast_atomic_dec_and_test':

/usr/src/asterisk-1.8.3/include/asterisk/lock.h:635: undefined reference to `__sync_sub_and_fetch_4'

utils.o: In function `ast_atomic_fetchadd_int':

/usr/src/asterisk-1.8.3/include/asterisk/lock.h:589: undefined reference to `__sync_fetch_and_add_4'

collect2: ld returned 1 exit status

make[1]: *** [asterisk] Error 1

make: *** [main] Error 2

Credible people in the Asterisk list believe that it's because the configure script is somehow determining that my CPU provides atomic instructions but it fails to find it when it tries to link. Does anyone know what options can be provided to the "configure" script via CFLAGS or CXXFLAGS etc to tell make/compiler about this or to fix this?

Thanks so much

\RR