atomic_or problem - build failure

[Ryo Chiba <deadskin_mask%sky.bbexcite.jp@localhost>]

Hello,

I'm building -current on amd64-current box(4800+/2gb).

sparc64-current building stops here:

#      link  arithmetic/arithmetic
/home/amink/NetBSD-build/src/../tools/sparc64/bin/sparc64--netbsd-gcc 
-Wl,-nostdlib        -o arithmetic 
-Wl,-rpath-link,/home/amink/NetBSD-build/target/dest/sparc64/lib:/home/amink/NetBSD-build/target/dest/sparc64/usr/lib 
 -L/home/amink/NetBSD-build/target/dest/sparc64/lib 
-B/home/amink/NetBSD-build/target/dest/sparc64/usr/lib/ 
-B/home/amink/NetBSD-build/target/dest/sparc64/usr/lib/   arithmetic.o 
     -L/home/amink/NetBSD-build/target/dest/sparc64/usr/lib 
-L/home/amink/NetBSD-build/target/dest/sparc64/usr/lib
/home/amink/NetBSD-build/target/dest/sparc64/lib/libc.so: undefined 
reference to `_atomic_or'
collect2: ld returned 1 exit status
*** [arithmetic] Error code 1
1 error

nbmake: stopped in /home/amink/NetBSD-build/src/games/arithmetic
*** [dependall] Error code 2
1 error

Any idea?
Thanks.

Ryo Chiba