buildworld failure on 10.1 - Please advise

Hello everyone

I beg to be advised on what I should do to solve why my attempts at
buildworld on 10.1-RELEASE fail as follows:


===> gnu/usr.bin/gperf (obj,depend,all,install)
===> gnu/usr.bin/gperf/doc (obj)
/usr/obj/usr/src/tmp/usr/src/gnu/usr.bin/gperf/doc created for
/usr/src/gnu/usr.bin/gperf/doc
rm -f .depend
CC='clang' mkdep -f .depend -a    -I/usr/obj/usr/src/tmp/legacy/usr/include
-I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib -I/usr/src/gnu/usr
.bin/gperf
 /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/bool-array.cc
/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/hash-table.c
c /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/input.cc
/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/keyword-list.cc
/usr/src/gnu/us
r.bin/gperf/../../../contrib/gperf/src/keyword.cc
/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/main.cc
/usr/src/gnu/usr.bin/gperf/../../../co
ntrib/gperf/src/options.cc
/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/output.cc
/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/posit
ions.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/search.cc
/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/version.cc
/usr/src/gnu/
usr.bin/gperf/../../../contrib/gperf/lib/getline.cc
/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib/hash.cc
echo gperf: /usr/lib/libc.a /usr/obj/usr/src/tmp/legacy/usr/lib/libegacy.a
>> .depend
echo gperf: /usr/lib/libc++.a >> .depend
===> gnu/usr.bin/gperf/doc (depend)
clang++ -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include
 -I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib
-I/usr/src/gnu/usr.bin/gperf -c /
usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/bool-array.cc
clang++ -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include
 -I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib
-I/usr/src/gnu/usr.bin/gperf -c /
usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/hash-table.cc
clang++ -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include
 -I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib
-I/usr/src/gnu/usr.bin/gperf -c /
usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/input.cc
clang++ -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include
 -I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib
-I/usr/src/gnu/usr.bin/gperf -c /
usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/keyword-list.cc
clang++ -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include
 -I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib
-I/usr/src/gnu/usr.bin/gperf -c /
usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/keyword.cc
clang++ -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include
 -I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib
-I/usr/src/gnu/usr.bin/gperf -c /
usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/main.cc
clang++ -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include
 -I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib
-I/usr/src/gnu/usr.bin/gperf -c /
usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/options.cc
*** Error code 1

Stop.
make[3]: stopped in /usr/src/gnu/usr.bin/gperf
*** Error code 1

Stop.
make[2]: stopped in /usr/src
*** Error code 1

Stop.
make[1]: stopped in /usr/src
*** Error code 1

Stop.
make: stopped in /usr/src





-- 
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223
"I can't hear you -- I'm using the scrambler."