Buildworld failure

I blew away /usr/src and /usr/obj and re-cvsuped this morning.  I
attempted to buildworld, only to have the process die in the mkdep step.


CC='clang' mkdep -f .depend -a    -I/usr/src/cddl/usr.bin/ctfmerge/../../../sys/cddl/compat/opensolaris -I/usr/src/cddl/usr.bin/ctfmerge/../../../cddl/compat/opensolaris/include -I/usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris -I/usr/src/cddl/usr.bin/ctfmerge/../../../sys/cddl/contrib/opensolaris -I/usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/head -I/usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/common -I/usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt -I/usr/src/cddl/usr.bin/ctfmerge/../../../sys/cddl/contrib/opensolaris/uts/common -DNEED_SOLARIS_BOOLEAN -I/usr/obj/usr/src/tmp/legacy/usr/include /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/alist.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/ctf.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/ctfmerge.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/fifo.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/hash.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/iidesc.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/input.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/common/list.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/common/memory.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/merge.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/output.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/strtab.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/common/symbol.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/tdata.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/traverse.c /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/util.c
In file included from /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c:46:
/usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h:39:10: fatal error: 'semaphore.h' file not found
#include <semaphore.h>
         ^
1 error generated.
mkdep: compile failed
*** Error code 1

Stop in /usr/src/cddl/usr.bin/ctfmerge.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
-----> End buildworld Wed Dec 22 19:13:13 EST 2010 RC = 0

I don't understand what's happening here, as the same procedure worked
fine last week.  Can anybody tell me what I'm doing wrong here?
-- 
Best regards,
Derek Tattersall
dlt_at_mebtel.net		dlt666_at_yahoo.com		 dtatters_at_gmail.com