xnu build failure about darwinbuild HOT 3 CLOSED

can't find atom for N_GSYM stabs __dtrace_probe$625___proc____signal__handle in /private/var/tmp/xnu/xnu-1228.9.59.obj/RELEASE_PPC/./bsd/RELEASE/bsd.o
DSYMUTIL mach_kernel.sys
if [ 1  -eq  1 ]; then \
        /usr/bin/dsymutil --arch=ppc /private/var/tmp/xnu/xnu-1228.9.59.obj/RELEASE_PPC/./mach_kernel.sys -o /private/var/tmp/xnu/xnu-1228.9.59.obj/RELEASE_PPC/./mach_kernel.sys.dSYM > /dev/null; \
    fi;
dyld: Library not loaded: /usr/lib/libauto.dylib
  Referenced from: /usr/lib/libobjc.A.dylib
  Reason: image not found


/usr/local/bin/ctfconvert -l xnu -v -o /private/var/tmp/xnu/xnu-1228.9.59.obj/RELEASE_PPC/libkern/RELEASE/OSRuntimeSupport.o.ctf OSRuntimeSupport.o > /dev/null && /usr/local/bin/ctfdump -r `cat /SourceCache/xnu/xnu-1228.9.59/config/DtraceIgnored.symbols` /private/var/tmp/xnu/xnu-1228.9.59.obj/RELEASE_PPC/libkern/RELEASE/OSRuntimeSupport.o.ctf || true;
/bin/sh: /usr/local/bin/ctfconvert: No such file or directory