build distribution fails on sparc64

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

        Hello,

	As I'm unable tu build sparc current distribution on real sparc32 
hardware or on Linux/amd64, I'm building -current on my blade2000. 
Compilation fails with :

#   compile  csu/gcrt0.o
/usr/src/../tooldir/bin/sparc64--netbsd-gcc  -mcpu=ultrasparc3 
-mtune=ultrasparc3   --sysroot=/usr/src/../objdir/destdir.sparc64 
-DELFSIZE=32 -I/usr/src/lib/csu/arch/sparc -I/usr/src/libexec/ld.elf_so 
-I/usr/src/lib/csu/common -I.  -x assembler-with-cpp -c 
/usr/src/lib/csu/arch/sparc/crt0.S -o gcrt0.o.S.o
--- crt0.o ---
#   compile  csu/crt0.o
/usr/src/../tooldir/bin/sparc64--netbsd-gcc  -mcpu=ultrasparc3 
-mtune=ultrasparc3   --sysroot=/usr/src/../objdir/destdir.sparc64 
-DELFSIZE=32 -I/usr/src/lib/csu/arch/sparc -I/usr/src/libexec/ld.elf_so 
-I/usr/src/lib/csu/common -I.  -x assembler-with-cpp -c 
/usr/src/lib/csu/arch/sparc/crt0.S -o crt0.o.S.o
--- gcrt0.o ---
/usr/src/lib/csu/arch/sparc/crt0.S: Assembler messages:
/usr/src/lib/csu/arch/sparc/crt0.S:53: Error: detected global register 
use not covered by .register pseudo-op
...

	Both files come from sparc directory, not from sparc64. I'm suppose 
there is a bug in Makefile.

        Regards,

        JKB